In this Presentation, we have discussed SAS vs SATA. If you are interested in knowing the differences between SAS vs SATA, then it is very helpful to you.
Class lecture by Prof. Raj Jain on Storage Virtualization. The talk covers Disk Arrays, Data Access Methods, SCSI (Small Computer System Interface), Advanced Technology Attachment (ATA), ESCON and FICON, Fibre Chanel, Fibre Channel Devices, Fibre Channel Protocol Layers, Fibre Channel Flow Control, Fibre Channel Classes of Service, What is Storage Virtualization?, Benefits of Storage Virtualization, Virtualizing Storage, RAID Levels, Nested RAIDs, Synchronous vs. Asynchronous Replication, Virtual Storage Area Network (VSAN), Physical Storage Network, Virtual Storage Network, SAN vs. NAS, iSCSI (Internet Small Computer System Interface), iFCP (Internet Fiber Channel Protocol), FCIP (Fibre Channel over IP), FCoE (Fibre Channel over Ethernet), Virtual File Systems. Video recording available in YouTube.
iSCSI allows storage devices to be accessed over IP networks rather than direct attaching via SCSI cables. It works by encapsulating SCSI commands and data within TCP packets. Key points:
- iSCSI targets export storage as logical units (LUNs) over iSCSI. Initiators can then access these LUNs remotely over IP networks.
- This allows centralized storage consolidation and disaster recovery mirroring between data centers connected via IP.
- Security features include CHAP authentication of initiators and targets as well as logical/physical network isolation of iSCSI traffic.
- Challenges include the different performance characteristics of SCSI versus TCP/IP networks, such as higher delays over WAN
This document discusses the history and technical details of Serial ATA (SATA) storage interfaces. It covers:
- The evolution of parallel ATA standards over time and their limitations that led to SATA.
- The key benefits of SATA including smaller connectors, higher speeds, and support for multiple devices via point-to-point connections.
- An overview of the SATA architecture and protocol stack, including the physical, link, and transport layers.
- Details of the physical layer such as connectors, cabling, and out-of-band signaling.
- How the link layer implements 8b/10b encoding, scrambling, frame structure, and flow control primitives.
This document provides an overview of storage area network (SAN) concepts, including definitions of different types of storage (DAS, NAS, SAN), storage vendors, disk types, RAID technology, SAN switches, hardware components, technical terms, and zoning. It defines key SAN concepts such as arrays, LUNs, provisioning, cache, hot spares, WWNs, and the difference between hard and soft zoning. The document is intended to explain fundamental SAN concepts.
This document provides an overview of various data storage technologies including RAID, DAS, NAS, and SAN. It discusses RAID levels like RAID 0, 1, 5 which provide data striping and redundancy. Direct attached storage (DAS) connects directly to servers but cannot be shared, while network attached storage (NAS) uses file sharing protocols over IP networks. Storage area networks (SAN) use dedicated storage networks like Fibre Channel and iSCSI to provide block-level access to consolidated storage. The key is choosing the right solution based on capacity, performance, scalability, availability, data protection needs, and budget.
Storage systems include disks, disk shelves, controllers, and switches. Servers connect to storage using host bus adapters (HBAs) and software initiators to access disks over Fibre Channel (FCP) or iSCSI. NetApp uses its DataOntap operating system to manage disks aggregated into RAID groups and provisioned into volumes that provide file-level access over protocols like NFS, CIFS, iSCSI, and FC. Volumes contain file systems and can be accessed by servers over dedicated block storage devices called LUNs.
Basic knowledge of Storage technology and complete understanding on DAS, NAS & SAN with advantages and disadvantages. A quick understanding on storage will help you make the best decision in terms of cost and need.
Class lecture by Prof. Raj Jain on Storage Virtualization. The talk covers Disk Arrays, Data Access Methods, SCSI (Small Computer System Interface), Advanced Technology Attachment (ATA), ESCON and FICON, Fibre Chanel, Fibre Channel Devices, Fibre Channel Protocol Layers, Fibre Channel Flow Control, Fibre Channel Classes of Service, What is Storage Virtualization?, Benefits of Storage Virtualization, Virtualizing Storage, RAID Levels, Nested RAIDs, Synchronous vs. Asynchronous Replication, Virtual Storage Area Network (VSAN), Physical Storage Network, Virtual Storage Network, SAN vs. NAS, iSCSI (Internet Small Computer System Interface), iFCP (Internet Fiber Channel Protocol), FCIP (Fibre Channel over IP), FCoE (Fibre Channel over Ethernet), Virtual File Systems. Video recording available in YouTube.
iSCSI allows storage devices to be accessed over IP networks rather than direct attaching via SCSI cables. It works by encapsulating SCSI commands and data within TCP packets. Key points:
- iSCSI targets export storage as logical units (LUNs) over iSCSI. Initiators can then access these LUNs remotely over IP networks.
- This allows centralized storage consolidation and disaster recovery mirroring between data centers connected via IP.
- Security features include CHAP authentication of initiators and targets as well as logical/physical network isolation of iSCSI traffic.
- Challenges include the different performance characteristics of SCSI versus TCP/IP networks, such as higher delays over WAN
This document discusses the history and technical details of Serial ATA (SATA) storage interfaces. It covers:
- The evolution of parallel ATA standards over time and their limitations that led to SATA.
- The key benefits of SATA including smaller connectors, higher speeds, and support for multiple devices via point-to-point connections.
- An overview of the SATA architecture and protocol stack, including the physical, link, and transport layers.
- Details of the physical layer such as connectors, cabling, and out-of-band signaling.
- How the link layer implements 8b/10b encoding, scrambling, frame structure, and flow control primitives.
This document provides an overview of storage area network (SAN) concepts, including definitions of different types of storage (DAS, NAS, SAN), storage vendors, disk types, RAID technology, SAN switches, hardware components, technical terms, and zoning. It defines key SAN concepts such as arrays, LUNs, provisioning, cache, hot spares, WWNs, and the difference between hard and soft zoning. The document is intended to explain fundamental SAN concepts.
This document provides an overview of various data storage technologies including RAID, DAS, NAS, and SAN. It discusses RAID levels like RAID 0, 1, 5 which provide data striping and redundancy. Direct attached storage (DAS) connects directly to servers but cannot be shared, while network attached storage (NAS) uses file sharing protocols over IP networks. Storage area networks (SAN) use dedicated storage networks like Fibre Channel and iSCSI to provide block-level access to consolidated storage. The key is choosing the right solution based on capacity, performance, scalability, availability, data protection needs, and budget.
Storage systems include disks, disk shelves, controllers, and switches. Servers connect to storage using host bus adapters (HBAs) and software initiators to access disks over Fibre Channel (FCP) or iSCSI. NetApp uses its DataOntap operating system to manage disks aggregated into RAID groups and provisioned into volumes that provide file-level access over protocols like NFS, CIFS, iSCSI, and FC. Volumes contain file systems and can be accessed by servers over dedicated block storage devices called LUNs.
Basic knowledge of Storage technology and complete understanding on DAS, NAS & SAN with advantages and disadvantages. A quick understanding on storage will help you make the best decision in terms of cost and need.
The document discusses the differences between network attached storage (NAS) and storage area network (SAN) solutions for small businesses. It outlines the key benefits and use cases of each technology. NAS is best for file sharing and backup, while SAN provides faster performance for databases and applications. The document also notes that a combination of NAS and SAN can provide the best of both worlds.
The document discusses storage area networks (SANs) and fiber channel technology. It provides background on SANs and how they function as a separate high-speed network connecting storage resources like RAID systems directly to servers. It then covers SAN topologies using fiber channel, including point-to-point, arbitrated loop, and fabric switch configurations. Finally, it discusses planning, managing and the management perspective of SANs in the data center.
The document provides information about SCSI (Small Computer System Interface) domains, components, protocols, and concepts. It describes the SCSI bus model including initiators, targets, logical units, and phases like arbitration, selection, command, data transfer, status, and message. It explains SCSI commands, CDBs, status values, sense data, and error recovery. It also covers logical unit resets, unit attention conditions, contingent allegiance, auto contingent allegiance, and task management functions. The document is a technical reference for SCSI specifications, protocols, and error handling.
This document provides an introduction to storage concepts and the history of disk and tape storage. It discusses how storage has evolved from the earliest mainframes using punched cards and magnetic tape, to the introduction of disk drives and disk arrays. The key developments covered include the transition from tape to disk drives for faster direct access storage, the benefits of RAID technology for performance and redundancy, and how storage architectures continue advancing with higher capacity and faster disks.
The document provides an overview of storage technology options including network attached storage (NAS), storage area networks (SANs), and discusses specific NAS and SAN products. It highlights the key features of an iSCSI SAN brick platform including software for snapshots, replication, and continuous data protection. Appliance strategies and partnerships are also summarized.
This presentation gives an overview of physical storage technologies and the various ways of accessing storage on a computer or a server. Presented at School of Engineering and Applied Science, Ahmedabad University as a part of Software Engineering course.
This document discusses tuning HBase and HDFS for performance and correctness. Some key recommendations include:
- Enable HDFS sync on close and sync behind writes for correctness on power failures.
- Tune HBase compaction settings like blockingStoreFiles and compactionThreshold based on whether the workload is read-heavy or write-heavy.
- Size RegionServer machines based on disk size, heap size, and number of cores to optimize for the workload.
- Set client and server RPC chunk sizes like hbase.client.write.buffer to 2MB to maximize network throughput.
- Configure various garbage collection settings in HBase like -Xmn512m and -XX:+UseCMSInit
The document describes the specifications and operations of Double Data Rate (DDR) SDRAM memory. It details features like double data rate architecture, burst lengths, CAS latencies, commands like read, write, refresh, and initialization procedures. It provides timing diagrams for different memory operations.
Learn to setup Samba and NFS in ubuntu server - ubuntu client and ubuntu server - windows client environment. Also, comparison of NAS vs DAS, NAS vs SAN, samba vs NFS. The question of why NAS is required and what challanges we faced can be learned through this slide.
SCSI (Small Computer System Interface) is a hardware interface and protocol standard that allows multiple peripheral devices to be connected to a host computer. Some key points:
- SCSI originated from SASI and was later standardized. It defines connections, commands, and protocols for devices to communicate.
- Devices have roles as initiators that request operations or targets that perform operations. A host adapter connects the SCSI bus to the computer.
- SCSI supports various bus widths, speeds, and signaling methods over several generations to improve performance and reliability over longer distances.
- Features like command queuing and tagging allow efficient handling of multiple concurrent requests between devices.
This document provides an overview of SCSI drives and file systems. It describes SCSI interfaces and cables, how SCSI devices are connected in a daisy chain configuration, and SCSI standards including SCSI-1, SCSI-2, and SCSI-3. It also summarizes the FAT and NTFS file systems used in Windows, how they allocate disk space and store file information differently, and the advantages of NTFS. The document concludes with a brief explanation of how disk compression works to save space.
Storage devices are used to store data outside of a computer's main memory. There are different types of storage including primary storage like RAM and cache that is directly accessible by the CPU. Secondary storage like hard disks requires accessing through input/output channels. Tertiary storage uses robotic mechanisms to store data offline. Linux uses disk partitioning to organize storage across physical disks using schemes like MBR and GPT. Logical volumes and RAID provide additional abstraction and redundancy. Network storage solutions like NAS export file systems over a network while SANs export block storage using protocols like Fibre Channel and iSCSI.
Introduction to san ( storage area networks )sagaroceanic11
This document provides an introduction and overview of different types of storage networks, including DAS, NAS, and SAN. It defines each type of storage network and compares their key features such as interface technologies, file systems, capacity, speed, management, and more. The document also outlines some core technologies and major players involved in networking solutions, storage solutions, backup technologies, SAN management, high availability, and disaster recovery. It concludes by discussing emerging technologies and future focus areas for storage networks.
Instaclustr has a diverse customer base including Ad Tech, IoT and messaging applications ranging from small start ups to large enterprises. In this presentation we share our experiences, common issues, diagnosis methods, and some tips and tricks for managing your Cassandra cluster.
About the Speaker
Brooke Jensen VP Technical Operations & Customer Services, Instaclustr
Instaclustr is the only provider of fully managed Cassandra as a Service in the world. Brooke Jensen manages our team of Engineers that maintain the operational performance of our diverse fleet clusters, as well as providing 24/7 advice and support to our customers. Brooke has over 10 years' experience as a Software Engineer, specializing in performance optimization of large systems and has extensive experience managing and resolving major system incidents.
This document provides an overview of Virtual SAN design and architecture. It discusses Virtual SAN components such as disk groups, datastores, and objects. It describes how data is distributed across disks groups and hosts using techniques like striping and mirroring. It also covers storage policies and how they determine the layout and number of components for distributed objects. Use cases like all-flash configurations, ROBO solutions, and stretched clusters are explained at a high level.
Storage Area Network (SAN) is a dedicated, high-speed network that connects servers to storage devices like disks, disk arrays, and tapes. A SAN provides centralized storage that can be accessed by multiple servers, providing high capacity, high availability, and scalability compared to Direct Attached Storage. Fiber Channel is commonly used as the networking technology for SANs, allowing blocks of data to be accessed by servers over the high-speed SAN fabric.
Linux provide facilities to expose emulated LUNs to initiators using Linux-IO (LIO) scsi target implementation . LIO not only support exposing conventional block devices but also supports other storage interfaces like file or memory based LUNs. Also it supports multiple fabric interfaces - FC, FCoE, iscsi and many more.
LIO can be used in SAN environments with minimal storage resources.
Native support for LIO in linux hypervisors and in Openstack make it a good storage option for cloud deployments.
SSD vs SAS vs SATA which is better for a dedicated serverCasperLAWRENCE
We hope this article has cleared up any confusion you may have had regarding the different types of hard drives (SSD vs SAS vs SATA) and which hard drives you should choose for your dedicated server. So, choose the best decision for your server's performance and lifespan.
The document discusses the differences between network attached storage (NAS) and storage area network (SAN) solutions for small businesses. It outlines the key benefits and use cases of each technology. NAS is best for file sharing and backup, while SAN provides faster performance for databases and applications. The document also notes that a combination of NAS and SAN can provide the best of both worlds.
The document discusses storage area networks (SANs) and fiber channel technology. It provides background on SANs and how they function as a separate high-speed network connecting storage resources like RAID systems directly to servers. It then covers SAN topologies using fiber channel, including point-to-point, arbitrated loop, and fabric switch configurations. Finally, it discusses planning, managing and the management perspective of SANs in the data center.
The document provides information about SCSI (Small Computer System Interface) domains, components, protocols, and concepts. It describes the SCSI bus model including initiators, targets, logical units, and phases like arbitration, selection, command, data transfer, status, and message. It explains SCSI commands, CDBs, status values, sense data, and error recovery. It also covers logical unit resets, unit attention conditions, contingent allegiance, auto contingent allegiance, and task management functions. The document is a technical reference for SCSI specifications, protocols, and error handling.
This document provides an introduction to storage concepts and the history of disk and tape storage. It discusses how storage has evolved from the earliest mainframes using punched cards and magnetic tape, to the introduction of disk drives and disk arrays. The key developments covered include the transition from tape to disk drives for faster direct access storage, the benefits of RAID technology for performance and redundancy, and how storage architectures continue advancing with higher capacity and faster disks.
The document provides an overview of storage technology options including network attached storage (NAS), storage area networks (SANs), and discusses specific NAS and SAN products. It highlights the key features of an iSCSI SAN brick platform including software for snapshots, replication, and continuous data protection. Appliance strategies and partnerships are also summarized.
This presentation gives an overview of physical storage technologies and the various ways of accessing storage on a computer or a server. Presented at School of Engineering and Applied Science, Ahmedabad University as a part of Software Engineering course.
This document discusses tuning HBase and HDFS for performance and correctness. Some key recommendations include:
- Enable HDFS sync on close and sync behind writes for correctness on power failures.
- Tune HBase compaction settings like blockingStoreFiles and compactionThreshold based on whether the workload is read-heavy or write-heavy.
- Size RegionServer machines based on disk size, heap size, and number of cores to optimize for the workload.
- Set client and server RPC chunk sizes like hbase.client.write.buffer to 2MB to maximize network throughput.
- Configure various garbage collection settings in HBase like -Xmn512m and -XX:+UseCMSInit
The document describes the specifications and operations of Double Data Rate (DDR) SDRAM memory. It details features like double data rate architecture, burst lengths, CAS latencies, commands like read, write, refresh, and initialization procedures. It provides timing diagrams for different memory operations.
Learn to setup Samba and NFS in ubuntu server - ubuntu client and ubuntu server - windows client environment. Also, comparison of NAS vs DAS, NAS vs SAN, samba vs NFS. The question of why NAS is required and what challanges we faced can be learned through this slide.
SCSI (Small Computer System Interface) is a hardware interface and protocol standard that allows multiple peripheral devices to be connected to a host computer. Some key points:
- SCSI originated from SASI and was later standardized. It defines connections, commands, and protocols for devices to communicate.
- Devices have roles as initiators that request operations or targets that perform operations. A host adapter connects the SCSI bus to the computer.
- SCSI supports various bus widths, speeds, and signaling methods over several generations to improve performance and reliability over longer distances.
- Features like command queuing and tagging allow efficient handling of multiple concurrent requests between devices.
This document provides an overview of SCSI drives and file systems. It describes SCSI interfaces and cables, how SCSI devices are connected in a daisy chain configuration, and SCSI standards including SCSI-1, SCSI-2, and SCSI-3. It also summarizes the FAT and NTFS file systems used in Windows, how they allocate disk space and store file information differently, and the advantages of NTFS. The document concludes with a brief explanation of how disk compression works to save space.
Storage devices are used to store data outside of a computer's main memory. There are different types of storage including primary storage like RAM and cache that is directly accessible by the CPU. Secondary storage like hard disks requires accessing through input/output channels. Tertiary storage uses robotic mechanisms to store data offline. Linux uses disk partitioning to organize storage across physical disks using schemes like MBR and GPT. Logical volumes and RAID provide additional abstraction and redundancy. Network storage solutions like NAS export file systems over a network while SANs export block storage using protocols like Fibre Channel and iSCSI.
Introduction to san ( storage area networks )sagaroceanic11
This document provides an introduction and overview of different types of storage networks, including DAS, NAS, and SAN. It defines each type of storage network and compares their key features such as interface technologies, file systems, capacity, speed, management, and more. The document also outlines some core technologies and major players involved in networking solutions, storage solutions, backup technologies, SAN management, high availability, and disaster recovery. It concludes by discussing emerging technologies and future focus areas for storage networks.
Instaclustr has a diverse customer base including Ad Tech, IoT and messaging applications ranging from small start ups to large enterprises. In this presentation we share our experiences, common issues, diagnosis methods, and some tips and tricks for managing your Cassandra cluster.
About the Speaker
Brooke Jensen VP Technical Operations & Customer Services, Instaclustr
Instaclustr is the only provider of fully managed Cassandra as a Service in the world. Brooke Jensen manages our team of Engineers that maintain the operational performance of our diverse fleet clusters, as well as providing 24/7 advice and support to our customers. Brooke has over 10 years' experience as a Software Engineer, specializing in performance optimization of large systems and has extensive experience managing and resolving major system incidents.
This document provides an overview of Virtual SAN design and architecture. It discusses Virtual SAN components such as disk groups, datastores, and objects. It describes how data is distributed across disks groups and hosts using techniques like striping and mirroring. It also covers storage policies and how they determine the layout and number of components for distributed objects. Use cases like all-flash configurations, ROBO solutions, and stretched clusters are explained at a high level.
Storage Area Network (SAN) is a dedicated, high-speed network that connects servers to storage devices like disks, disk arrays, and tapes. A SAN provides centralized storage that can be accessed by multiple servers, providing high capacity, high availability, and scalability compared to Direct Attached Storage. Fiber Channel is commonly used as the networking technology for SANs, allowing blocks of data to be accessed by servers over the high-speed SAN fabric.
Linux provide facilities to expose emulated LUNs to initiators using Linux-IO (LIO) scsi target implementation . LIO not only support exposing conventional block devices but also supports other storage interfaces like file or memory based LUNs. Also it supports multiple fabric interfaces - FC, FCoE, iscsi and many more.
LIO can be used in SAN environments with minimal storage resources.
Native support for LIO in linux hypervisors and in Openstack make it a good storage option for cloud deployments.
SSD vs SAS vs SATA which is better for a dedicated serverCasperLAWRENCE
We hope this article has cleared up any confusion you may have had regarding the different types of hard drives (SSD vs SAS vs SATA) and which hard drives you should choose for your dedicated server. So, choose the best decision for your server's performance and lifespan.
This document discusses various computer storage technologies including:
- FIFO and LRU caching algorithms.
- Hard disk drives including cylinders, tracks, sectors, and clusters. Latency is discussed in relation to rotational speed.
- Solid state drives and their advantages over hard disk drives like speed and lack of moving parts.
- SATA vs ATA interfaces and performance comparisons.
- RAID disk arrays and their use of redundancy to increase reliability.
- NTFS and FAT16 file systems. NTFS supports long filenames and compression while FAT16 has limitations like a 2GB size limit.
Nachos 2
The document discusses various data storage technologies including FIFO, LRU, cache memory, hard disk drives, solid state drives, SATA vs ATA interfaces, and RAID disk arrays. It provides details on the characteristics and implementations of each technology, such as how FIFO and LRU ordering techniques work, the components and operation of hard disks, performance comparisons of SATA and ATA interfaces, and the use of redundancy in RAID arrays.
IT Engineer are high-level IT personnel who design, install, and maintain a company's computer systems. They are responsible for testing, configuring, and troubleshooting hardware, software, and networking systems to meet the needs of the employer.
The document discusses storage area networks (SANs) for database administrators. It covers SAN components like fiber optic cards, switches, and disk arrays. RAID levels like 0, 1, 5, and 10 are explained along with their benefits and drawbacks. Solid state drives offer faster performance but at a higher cost. The document recommends placing tempdb and log files on separate high-performance disks. SANs provide benefits like easy capacity expansion, high availability, and disaster recovery through replication. DBAs should work with their SAN administrators to test performance and isolate databases and their files.
1. The document discusses various factors that impact hard drive performance, including platter diameter and count, recording technology, rotation speed, and interface. Higher data densities and faster rotation speeds allow drives to transfer more data in a given time period but also increase complexity and energy usage.
2. Key parameters discussed include spindle speed, which has the largest impact on performance; higher speeds mean more data passes the read/write heads per minute. Recording technology also influences density - perpendicular magnetic recording currently allows highest densities but heat-assisted magnetic recording may further increase capacity.
3. While similar on paper, drives can still vary in performance due to differences in cache sizes, capacities, and interface types even within a model family. The largest
This white paper discusses system storage reliability. It begins by defining key reliability metrics like MTBF and MTBI and how they apply to non-redundant and redundant storage configurations. It then analyzes the reliability impacts of different RAID levels and drive types. RAID 6 is recommended for use with SATA drives to protect against double failures during rebuild. The paper also calculates reliability statistics for various hypothetical storage systems to illustrate these concepts.
SAN vs NAS vs DAS: Decoding Data Storage SolutionsMaryJWilliams2
Discover the advantages and differences of SAN, NAS, and DAS storage solutions. With our detailed comparison and insights, you'll be able to determine which data storage system suits your needs best.
For more information visit: https://stonefly.com/blog/san-vs-nas-vs-das-a-closer-look/
Demystifying Storage - Building large SANsDirecti Group
From http://wiki.directi.com/x/hQAa - This is a fairly detailed presentation I made at BarCamp Mumbai on building large storage networks and different SAN topologies. It covers fundamentals of selecting harddrives, RAID levels and performance of various storage architectures. This is Part I of a 3-part series
This document provides advice on choosing the right server hardware based on application needs. It discusses factors like processor, RAM, storage, and manageability for different server roles like web, file, database, compute-intensive, and virtualization. The document also covers important considerations like expandability, redundancy, performance testing methodology, and support services.
Building Data Pipelines with SMACK: Designing Storage Strategies for Scale an...DataStax
Learn how to build an effective storage layer for a variety of workloads. With changing trends in system and storage hardware, understanding design trade-offs can be a challenge. This webinar will focus on cutting through the noise and diving into the choices that matter when designing for scale and performance.
Video: https://youtu.be/uEL8vyVSIis
From http://wiki.directi.com/x/hQAa - This is a fairly detailed presentation I made at BarCamp Mumbai on building large storage networks and different SAN topologies. It covers fundamentals of selecting harddrives, RAID levels and performance of various storage architectures. This is Part I of a 3-part series.
1) SSD provides significantly higher performance than spinning disks by using flash memory instead of spinning platters to store data.
2) There are several form factors for SSD including drives that replace spinning disks, PCIe cards, and memory appliances with SSD DIMMs.
3) The best locations to implement SSD are where they can provide global acceleration benefits across many applications, such as in a storage array controller or memory appliance connected to a storage controller.
Fulcrum Group Storage And Storage Virtualization PresentationSteve Meek
The document discusses storage solutions and SANs. Exponential data growth is expected to continue challenging data protection efforts. Different storage types fit different business needs. By understanding storage design and an organization's needs, storage virtualization may be a good fit. SANs can help with general server needs, virtualization, and disaster recovery/backup needs. Planning is key to deploying storage in a centralized way.
Solid Access Technologies is a privately held company based in Massachusetts that develops solid state disk (SSD) technology using standard interfaces like Fibre Channel and SAS. Their SSD products have outperformed other storage technologies in customer benchmarks. With headquarters in Boston and offices in Prague, Solid Access focuses on global opportunities through direct sales and partners. Their SSD products eliminate hard disk drive bottlenecks and accelerate applications by providing over 300,000 random IOPS and 3.6GB/s bandwidth while integrating with existing storage infrastructures.
This document provides guidance on practical issues that may be encountered when attempting to perform do-it-yourself (DIY) RAID recovery. It discusses system requirements, including both software requirements like sufficient memory and CPU as well as hardware requirements such as ensuring the power supply can support additional disks. It also covers best practices such as avoiding system reboots during recovery and connecting disks directly via SATA for maximum performance rather than through USB, which can significantly slow recovery times.
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SAS vs SATA_ The Key Differences That You Should Know.pptx
1. SAS vs SATA: The
Key Differences That
You Should Know
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2. Introduction
SAS is an acronym for Serial Attached SCSI or Serial Attached Small Computer System
Interface. And SATA is an acronym for Serial ATA or Serial Advanced Technology
Attachment.
SAS and SATA connectors are used for connecting the components of the computer to
motherboards, like hard drives and media drives. However, hard drives which are based
on SAS are quicker as well as more reliable than the hard drives which are based on
SATA. But, SATA drives offer significantly higher storage capacity. SAS drives are utilized
for servers because they are fast and dependable, whereas SATA drives are utilized for
personal computing and are less expensive.
In this blog, we will discuss about some differences between SAS vs SATA that are
essential ones.
3. What Is SAS Storage?
SAS (Serial Attached SCSI) is the recent evolution of the SCSI interface
drives that are utilized in higher-end workstations and servers. Most
current servers use HDD or SSD drives, just like consumer computers,
but they’re quicker and more reliable.
5. 1. Faster Throughput
SAS drives can read/write and process data in a fraction of the time it takes SATA
drives, especially for random reads/writes and with the newest 12 Gbps disks and
RAID hardware controllers. And at sequential data, SATA is a good one, but it is
terrible at random IOPS.
2. Better suited to 24/7 workloads
For servers, SAS is designed and frequently has 100% duty cycles. SAS is
designed to read/write data every day, unlike SATA drives for your home desktop,
which have 20-30% duty cycles.
6. Disadvantages Of SAS
Storage
1. SAS drives have a higher cost
SAS drives are around four times more costly than SATA drives.
And the cost for the SAS enterprise starts at $1/GB, it’s simple
to see why most hosts only provide SATA as a default option
for dedicated servers.
2. Higher electricity consumption
SAS consumes more electricity than SATA. In comparison to a
SATA or ATA disc, a SAS drive can need at least twice as much
signaling voltage.
7. What Is SATA Storage?
SATA (Serial ATA) is the recent evolution of the ATA hard drive. It is
done in the 1990s and early 2000s and moreover, it is utilized in the PC
desktop computers. Today’s PCs always come with SATA-II or SATA-III
ports, and SSDs are becoming more common.
9. 1. Cheaper than SAS
As compared to SAS drives, SATA drives are 75% less expensive. As a result,
hosting companies provide more storage space at cheaper prices – or at a bigger
profit margin.Customers that have a dedicated server can take benefit of
additional storage, such as backup drives.
2. Sequentially fast
SATA is excellent at writing in sequential order and it has a throughput of 6 Gbps
and can write at that rate if no random reads/writes are present.
10. Disadvantages of SATA
Storage
1. Bad random read/write performance:
Random read/write seek and storage delay are comparable to
a racing car’s cornering abilities on a track.Taking the bend is
more difficult than going straight (sequential). And random
read/write requests cause a SATA drive to crawl.
2. Uses the CPU
SAS has an enterprise-class data management system,
whereas SATA does not. Data flow management is delegated
to the CPU through SATA. As a result, disc I/O spikes have a
significant influence on the system load average.
11. SAS Vs SATA: The Key
Differences
1. Speed
The quantity of data that can be transferred, processed, or read and written in a certain
length of time is referred to as throughput. Drive throughput is benchmarked or measured
to determine drive speeds. SAS drives often have better throughput than SATA drives
since there are fewer delays in general. However, in the slower SAS and faster SATA
drives, there is some overlap between them.
12. 2. Storage Capacity
SAS gives priority to speed over storage. As a result, the majority of SAS drives on the
market have less than 500GB of hard disk space. Those with more than 500GB of storage
capacity might be rather costly.
On the other hand, SATA emphasizes storage; therefore, finding a cheap SATA drive with
1TB or more capacity is simple.
13. 3. Reliability
SAS is built for 24/7 use in companies, such as data centers, which is a key distinction
between SAS and SATA. While SATA drive is used technically in the same way as a SAS
drive and it would be slower and more likely to fail. Organizations that rely on trustworthy
hard drives this is an expensive problem. A SAS drive’s MTBF (mean time between
failures) is 1.2 to 1.6 million hours of use at 45 °C, whereas a SATA drive’s MTBF is
700,000 to 1.2 million hours at 25 °C.
14. Conclusion: SAS Vs SATA
Here, we have discussed SAS vs SATA. And, for the students to understand the essential
differences between the terms SAS vs SATA is very useful. And we hope that now you
have got all the information related to SAS vs SATA.
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