120 GB 240 GB 480 GB 120 GB 240 GB 480 GB 120 GB 240 GB 480 GB 960 GB 100 GB 200 GB 400 GB 800 GB
207 TB 415 TB 830 TB 1 PB 2 PB 4 PB 2 PB 4 PB 8 PB 16 PB 4 PB 8 PB 16 PB 24 PB
52 TB
2)
105TB 210TB
250 TB
2)
500 TB 1 PB
500 TB
2)
1 PB 2 PB 4 PB
1.8 PB
3)
3.5 PB 7 PB 10 PB
Seq. Write @ 64KB 207 GB 415 GB 830 GB 1 TB 2 TB 4 TB 2 TB 4 TB 8 TB 16 TB 4 TB 8 TB 16 TB 24 TB
Ran. Write @ 4KB 52 GB 100 GB 210 GB 250 GB 500 GB 1 TB 500 GB 1 TB 2 TB 4 TB
Ran. Write @ 8KB 1.8 TB 3.5 TB 7 TB 10 TB
A TBW figures are prelimianry, and will be updated by the end of the year 2012, subject of change, please ask your Samsung sales representative for the latest information
B sustained (after pre-conditioning) 100% 4KB random write IOPS 24 hrs x 7 days x 365 days
C the higher the SSD density the higher the the write performance, the "up to" value refers to this aspect and reflects the performance of the highest density
D
Number of time that SSD capacity could be writteb in Random Writes per day for the specified period time given till TBW is consumed
Ver 13/ March 13 all data are subject to changes without notice, please conatct Samsung channel partner in your region for latest update © Samsung Semiconductor Europe
@4KB: Single / Dual Port : 30 KIOPS / 60KIOPS
@8KB: 90 / 150 KIOPS
@ 128KB: Single Port : 497 / 435 MB/s
Dual Port : 902 / 740 MB/s
@4KB: Single Port : 72 KIOPS Dual Port : 101.5 KIOPS
8KB: Single Port: 50 KIOPS Dual Port: 81 KIOPS
estimated allowed TBW per day
for a life time of 3 years:
TBW (Total Bytes Written) allowed
1) 100% 64KB Seq. Write
2) 100% 4KB Rand. Write
2)
3) 100% 8KB Rand. Write
Retention
virgin SSD / by guaranteed endurance
Latency Random Read/ write
WPD random / Sequencial write
(work load per day)
D
Samsung Enterprise SSD 2013
SSD vs. HDD: Smart ID & Life cycle The key advantage of SSD is its feature of having a forecastable life cycle. Lacking mechanical parts,
its life cycle depends strongly on writing of data which can be tracked by electrical commands, the so-called SMART IDs. Our Magicin
Tool for both windows and Linux platforms support you to track the amouth of data you write on SSD. If you track this over a period of
time in your environment, the extrapolation will provide you with an exact figure of the life cycle of your SSD. the TBW figures should
provide you an overview of expected life cycle.
Over-provisioning: The amount of the data intented to be written on SSD is not the same amount of data written on SSD. The
background is mainly the basic characteristics of Flash. Writing is done page-wise, but deleting happens on a block. Any SSD needs free
blocks to be able to write effectively. A designated physical area of the SSD which is not used for logical data allocations, called over-
provisioning, helps the controller to allow for a broader write bandwidth. the higher the over-provisioning the better the write
perfromance, witha trade-off of losing blocks for physical data.
Retention: Retention refers to the time that the cells in SSD are capable of
keeping the data before a refresh needs to take place. virgin SSD has up to 10
years retention based on the behavior of Flash cell built upon. The more the
Flash cell are written, the higher the cell wears off and and the leakage
current increases.by the consumption of TBW the retention declines to ~3
months.
Virgin SSD / Preconditioning: a virgin SSD has a very high write bandwidth. As
soon as all cells are written to once, the bandwidth decreases partially
dramatically. Hence, before testing and evaluating SSD performance, make
sure to have written to all cells once. This is called preconditioning of an SSD
to get sustained results.
Endurance / life cycle: SSD is based on NAND Flash cells. The writting of cells is
a destructive process. The more the cell is written the more the cell is damged.
The leakage current increases, retention decreases. If the SSD and so the cells
are connected to power 24/7 as in the case of server implementation could be
assumed, the firware of SSD could be adjusted on increasing endurance, while
the refresh of cells can be adjusted.
SSD as HDD replacement? SSD is not a direct HDD replacement. The writing
behavior of your application is key to a right choice of SSD. Check the TBW
figures and the calculated total GB per Day values to a get a feeling on each SSD
capabilities. The bandwidth and perfromance is the 2nd aspect to look into, and
last the latency.
Power Target
Typ. (Active Write) / Min. (idle)
Smart ID read out and setting
Magician Tool Windows & Linux
40-50% write
extensive read and Write cache , Data warehousing, high edurance
optimized
a perfect trade-off between cost and edurance;
MLC based SSD with Storage Firmware
SSD approach recommendation:
1) Pre-selection based on needs on TBW and
GB writes per day and targte application
guide
2) Perform a proof of concept
3) Implement concept in bigger scale
4) Keep monitoring the smart IDs
TBW: Total Bytes Written is a key parameter for SSD. The
data is provided above for the life cycle and a guidance of
total GB per day. Nothing is more critical to SSD than the
write behavior of your application.
high Endurance and high performance
RDX (SAS Dual Port: 12.0G)
60-70% write
Tier 0, Storage servers
relative price ball park per GB
20-30% write
Boot Drive / Scratch Drive, Meta data (HPC), Web
server, Random read perfromance
Read intensive, <10% Write
content & Streaming Servers, Low cost, Sequential
Read Performance
perferct cost sensitive, entry level, Low endurance,
High rentention
Mid range endurance, High rentention, low latency
recommendations
for design-in