Watch the full webinar here: http://bit.ly/1TUuUCK When considering flash storage, there are many misconceptions and outright myths. Especially when equating consumer-grade flash (USB sticks) to enterprise-grade SSDs. In this webinar SanDisk Chief Architect, Adam Roberts, will discuss 5 myths of flash storage and highlight what you need to look out for when choosing a storage device to accelerate your data center storage. This webinar will cover: 1.Data Protection 2.Power Fail Protection 3.Temperature Throttling/Overheating 4.QoS for Performance 5.SSD Endurance Stay tuned for future webinars which will look at the benefits of flash beyond performance…busting a few more myths on flash.

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Adam Roberts
5 Things You Need to Know About Enterprise Flash
Chief Architect, SanDisk
May 2016

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Forward-Looking Statements
During our meeting today we will make forward-looking statements.
Any statement that refers to expectations, projections or other characterizations of future events or circumstances
is a forward-looking statement, including those relating to market growth, industry trends, future products, product
performance and product capabilities. This presentation also contains forward-looking statements attributed to third
parties, which reflect their projections as of the date of issuance.
Actual results may differ materially from those expressed in these forward-looking statements due to a number of risks
and uncertainties, including the factors detailed under the caption “Risk Factors” and elsewhere in the documents we
file from time to time with the SEC, including our annual and quarterly reports.
We undertake no obligation to update these forward-looking statements, which speak only as of the date hereof or
as of the date of issuance by a third party, as the case may be.

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Simple answer:
It is a different class of…
 Data protection
 Device protection
 Performance expectation
The Question we will ask ourselves:
How is an Enterprise device different from a client device?

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End-to-End Data Protection
While “In Flight”

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RAM
RAM
 Data moves in lots of directions:
‒ To the flash media from the
controller
‒ To SRRAM/DRAM from the
controller
‒ Between the SRAM/DRAM and
the Flash media via controller
 Client SSDs may protect some,
or none of the data paths
 Enterprise SSDs per SanDisk®
definition will provide end to end
“in flight” data protection
There are a Lot of Data Paths Inside an SSD
NAND Controller
NAND
NAND
NAND
NAND
NAND
= any data path inside of a drive

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Power Failure Protection

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 RAM allows for quick writes commits
– Data is committed to fast RAM so
application can move forward quickly
– Data moves to persistent storage
in background
– RAM is volatile
Storage Devices Utilize SRAM/DRAM to Speed Up Writes
When write data is committed to RAM, the application assumes it is at rest. If the
device fails or power is disrupted prior to data actually being moved to final media,
the data is lost, or worse the customer accesses a stale copy of the data. Power fail
protection on an Enterprise drive will prevent this.

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 Good Engineering!
– We understand ratio of power and time
needed per specific capacity and drive
types to ensure writes in flight to final media
actually get there
– Power fail or interruption to drive or system
results in a RAM flush to persistent media
How Do We Do This?
Ultimately SanDisk® Enterprise drives not only provide additional performance
acceleration with RAM, but also ensures the acceleration mechanism doesn’t lose
or corrupt data. Client drives as a class will not provide this protection.

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Temperature Throttling and
General Protection from Itself

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 NAND is sensitive to heat
– SSDs produce their own heat
– SSDs are exposed to heat produced by other devices in the server
– SSDs are exposed to high ambient temperatures in some cases
 SanDisk Enterprise Drives monitor environmental conditions
the drive endures
– If the drive media is too hot, the device is throttled
– Preventing the media from overheating can save data
Drives Produce Heat, Especially When Writing

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Guardian Technology™ Platform –
Enhances Flash Endurance utilizing “in house” NAND knowledge
Endurance Data Retention Read Disturb
Adaptive Algorithms to Minimize Wear Intelligent Temperature-Aware Recycling Proactive Monitoring of Localized Reads
 Closed loop algorithms to optimize
the flash settings for each die
 Minimizes cell damage over the
product life
 Maximize operating retention by
recycling only when needed
 Refresh interval is adjusted as a function
of temperature
 Minimize performance degradation
in read intensive localized work-loads
 Adaptive algorithms to optimize read
thresholds
● ● ●
● ● ●

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Quality of Service (QoS)

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 QoS is a specification that SanDisk assigns to it’s Enterprise devices to help ensure the
customer can guarantee a certain level of performance
 An example of how SanDisk specifies QoS on one specific drive:
– Max read latency <50usec 99.99% of the time (QD1)
– Max write latency <100usec 99.99% of the time (QD1)
 Client devices do not typically offer a specification for QoS. The 99.99% specification
here is Enterprise quality and is actually better than a large number of Enterprise
SSD competitors.
 Performance stability allows solutions to be designed in which the user has confidence
in when the data will be delivered to the application. QoS provides levels of expected
performance that prevent over-margin in a design.
Quality of Service (QoS):
What is it and why does it matter?

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Our drives behave the same at the end of life
as they did when you installed them!

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0
50
100
150
200
250
300
350
0/100
W/R - 4
10/90
W/R
20/80
W/R
30/70
W/R
40/60
W/R
50/50
W/R
60/40
W/R
70/30
W/R
80/20
W/R
90/10
W/R
100/0
W/R
0/100
W/R - 4
10/90
W/R
20/80
W/R
30/70
W/R
40/60
W/R
50/50
W/R
60/40
W/R
70/30
W/R
80/20
W/R
90/10
W/R
100/0
W/R
Measurement for Read Data to Host Measurement for Write Data from Host
BOL EOL
19nm CloudSpeed 1000 Performance Over Life
 2 drives were short stroked to 1/8th capacity
 PE’s were applied rapidly over several weeks beyond end of life bit error rate
 Performance on 2 new drives is shown for comparison.
Performance profile is similar from beginning to end of life.
512bytetransfersizeIOPS

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Guardian brings other values to the customer
such as write amplification benefits

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WA for Different Workloads
1.5
1.7
1.9
2.1
2.3
2.5
2.7
2.9
3.1
3.3
3.5
0 10 20 30 40 50 60 70 80 90 100
WriteAmplification
Fraction of Address Space Receiving 90% of Writes
Competitor WA
SanDisk WA
SanDisk has developed special technology that dynamically identifies the “temperature” of write
data and minimizes write amplification for workloads with mixed hot and cold data. Device
performance can be used for the application and not to offset unneeded write amplification.
UniformMixed Hot / Cold

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Uncorrectable Bit Error Rate (UBER)

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Model Optimus Eco™ Optimus Ascend™ Optimus Ultra™ Optimus Extreme™ Optimus MAX™
Capacities1 400GB, 800GB,
1.6TB, 2TB
200GB, 400GB,
800GB, 1.6TB
150GB, 300GB,
600GB, 1.2TB
100GB, 200GB,
400GB, 800GB
4TB
Sequential Read/Write
MB/s3 Up to 530/530
200GB:
Up to 550/380
400GB - 1.6TB:
Up to 550/540
150GB:
Up to 550/380
300GB - 1.2TB:
Up to 550/540
100GB:
Up to 550/380
200GB - 800GB:
Up to 550/540
Up to 500/500
Random Read/Write
IOPS (4K)5 Up to 90K/35K Up to 95K/40K Up to 95K/40K Up to 95K/40K Up to 85K/11K
Interface 6Gb/s SAS 6Gb/s SAS 6Gb/s SAS 6Gb/s SAS 6Gb/s SAS
Interface Ports Dual
Form Factor 2.5” 2.5” 2.5” 2.5” 2.5”
Unrecovered Bit Error
Rate (UBER)
<1 sector in
1018 bits read
<1 sector in
1018 bits read
<1 sector in
1018 bits read
<1 sector in
1018 bits read
<1 sector in
1018 bits read
Endurance DWPD6 3 DWPD 10 DWPD 25 DWPD 45 DWPD 0.5
MTBF 2.5 Million Hours
Enterprise SSDs Take UBER to a Higher Level

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Model Lightning Eco™ Gen. II SSD Lightning Ascend™ Gen. II SSD Lightning Ultra™ Gen. II SSD
Capacities3 800GB, 1.6TB 200GB, 400GB, 800GB, 1.6TB 200GB, 400GB, 800GB
Sequential Read/Write MB/s4 Up to 980/6001 Up to 980/6001 Up to 980/7401
Random Read/Write IOPS Up to 195K/80K1 Up to 195K/100K1 Up to 199K/115K1
Interface 12Gb/s SAS 12Gb/s SAS 12Gb/s SAS
Interface Ports Dual (x2 wide) full-duplex Dual (x2 wide) full-duplex Dual (x2 wide) full-duplex
Form Factor 2.5" 2.5" 2.5"
Unrecovered Bit Error Rate (UBER) <1 sector in 1018 bits read <1 sector in 1018 bits read <1 sector in 1019 bits read
MTBF 2.5 Million Hours
Endurance Random Workload DWPD5 3 10 25
Enterprise SSDs Take UBER to a Higher Level

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Model Number PX600-1000 PX600-1300 PX600-2600 PX600-5200
Capacities1 1TB 1.3TB 2.6TB 5.2TB
Read Bandwidth (GB/s)2 2.7 2.7 2.7 2.7
Write Bandwidth (GB/s)2 1.5 1.7 2.2 2.1
Random Read IOPS (4K) 196,000 235,000 350,000 285,000
Random Write IOPS (4K) 330,000 375,000 385,000 385,000
Read Access Latency 92μs 92μs 92μs 92μs
Write Access Latency 15μs 15μs 15μs 15μs
Bus Interface Gen. 2, x8 Gen. 2, x8 Gen. 2, x8 Gen. 2, x8
Endurance (PBW)3 12 16 32 64
Reliability (UBER) 10-20
Fusion ioMemory™ PCIe Flash Cards
Take UBER to an Even Higher Level

22. Differentiated Data Reliability
(The story of an Enterprise drive’s drive)
 Google study1
– 20–63% of drives experience at least
one uncorrectable error during their
first four years in the field
– 2-7% develop at least one bad chip
 Facebook study2
– 4.2% and 34.1% of the SSDs…
reporting uncorrectable errors
 SanDisk Guardian Technology™
– Actively manages each flash cell
to minimize unrecovered errors
– Handles expected error modes
proactively
– Reduces the stress on each flash
cell with adaptive techniques for
gentle erases
– Reduces hard errors by optimal
placement of charge distributions
1. Shroeder et al, Flash Reliability in Production: The Expected and the Unexpected
2. Meza et al, A Large-Scale Study of Flash Memory Failures in the Field

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 Does your use case involve valuable data that can’t be lost?
– End to end data protection, coupled with published UBER ratings can allow for informed decisions on
redundancy decisions, and the need for things like UPS protection etc..
 Does your use case involve heavy compute or storage write access or require devices to
protect data even in warm ambient conditions?
– SSD writes produce power as does heavy CPU use while ambient temperatures can stress flash media.
Enterprise devices can help prevent media damage and save data
 Does your use case require performance predictability?
– Enterprise devices will typically provide some QoS to guide the users, while Enterprise will rarely if ever
provide this data.
– Knowing what you need with respect to performance and knowing what a device will deliver can prevent
wasting resources on performance margining used to prevent unacceptable performance drops
Let’s think thru what we discussed..

24. Thanks!
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