This document provides an overview of different types of networked storage solutions, including Direct Attached Storage (DAS), Network Attached Storage (NAS), and Storage Area Networks (SANs). It describes the key components, connectivity options, management considerations, and use cases for each solution. The document is divided into sections on DAS, NAS, Fibre Channel SANs, IP SANs, and Content Addressed Storage.

1. Section 3 – Networked Storage Introduction

4. Direct Attached Storage (DAS) Module 3.1

11. Internal DAS Application Example Hard Drive 40 Pin Ribbon Cable Motherboard

12. External DAS Application Example ESCON HBA Cable for external DAS connectivity

17. Network Attached Storage (NAS) Module 3.2

21. NAS Evolution Network Attached Storage (NAS) Stand Alone PC Networked File Sharing Networked PCs Portable Media for File Sharing

23. General Purpose Servers vs. NAS Devices Network Operating System I/O File System Print Drivers Applications General Purpose Server (NT or Unix Server) Network Operating System File System Single Function Device (NAS Server)

25. NAS Device Components NAS Device CIFS NFS Network Interface Storage Interface NAS Device OS SCSI, FC, or ATA IP Network

26. NAS File Services Protocols: NFS and CIFS NAS Device Network Interface Storage Interface NAS Device OS SCSI, FC, or ATA CIFS NFS IP Network Windows Unix NFS CIFS

30. Integrated vs. Gateway NAS Integrated NAS NAS Gateway IP Network IP Network FC Fabric NAS Head NAS Head

31. Integrated NAS System Integrated NAS System NAS Head Storage Direct Attach IP Network

32. Gateway NAS System Clients Application Servers Storage NAS Gateway FC Switch IP Network

34. Fibre Channel Storage Area Networks (SAN) Module 3.3

40. Evolution of Fibre Channel SAN SAN Islands FC Arbitrated Loop Interconnected SANs FC Switched Fabric Enterprise SANs FC Switched Fabric HUB

45. Nodes, Ports, & Links Node HBA Port 0 Port 0 Port 1 Port 1 Port n Port n Link Port 0 Port 0 Rx Tx

47. Connectivity Single Mode Fiber Storage Multimode Fiber Host

56. World Wide Names: Example World Wide Name - HBA 1 0 0 0 0 0 0 0 c 9 2 0 d c 4 0 Reserved 12 bits Company OUI 24 bits Company Specific 24 bits World Wide Name – Array 5 0 0 6 0 1 6 0 0 0 6 0 0 1 B 2 0101 0000 0000 0110 0000 0001 0110 0000 0000 0000 0110 0000 0000 0001 1011 0010 Company ID 24 bits Port Model seed 32 bits

70. Fabric Management: Zoning

71. Zoning Components Zone Zone Zone Zones (Library) Zone Set Zones Sets (Library) Members (WWN’s) Member Member Member Member Member Member

76. Internet Protocol Storage Area Networks (IP SAN) Module 3.4

82. IP Storage Approaches iSCSI FC FC FC FC FC IP Network IP Network IP Network IP Network iFCP FCIP iFCP Switch iFCPSwitch FCIP Router FCIP Router iSCSI/FC Gateway

94. iSCSI Model Layers IP Header TCP Header iSCSI Header SCSI Data SCSI Command Descriptor IP Datagram Storage IP Payload IP Payload SCSI CDB encapsulation

96. Content Addressed Storage (CAS) Module 3.5

112. How CAS Stores a Data Object Application Server Client CAS API Object ID Client presents data to API to be archived 1 Unique Content Address is calculated 2 Object is sent to CAS via CAS API over IP 3 CAS authenticates the Content Address and stores the object 4 Acknowledgement returned to application 5 Object-ID is retained and stored for future use 6

113. How CAS Retrieves a Data Object Application Server Client CAS Object is needed by an application 1 CAS authenticates the request and delivers the object 4 Application finds Content Address of object to be retrieved 2 Retrieval request is sent to the CAS via CAS API over IP 3 API Object ID