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SSD Selection Guide
Example
A general assessment based on requirements to determine the most suitable SSD device. When these factors are
known or specified in detail, we can calculate and conclude which SSD device is most suitable (see bottom of page).
Question
We need to know how much data is written to disk
(worst case) during a known time period (per second,
minute, hour etc.) and the nature of this data?
How much space is used on as fixed for your
application?
How long time shall this disk work with no problems?
Example Calculation and Conclusion
Calculation / Estimation of data rate:
Step
Factors
1
Chart Data: 2GB /Week
Log data and User Data: 10kB /Sec
Swap Data: 100kB /Sec
2
Required lifetime:
3
Calculate total amount of data
written to the SSD during its whole
lifetime:
4
Select Disk Using Table
Measure of number of write cycles (Intel® Solid-State Drive Toolbox software)
Download Software from:
Appendix
IND100077-130
Formula
2GB * 52
10kB * 60 * 60 * 24 * 365
100kB * 60 * 60 * 24 * 365
5 years
3.57TB * 5
https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18455
Client Answer
Chart Data
: 2GB /Week
Log/User Data: : 10kB /Sec
Swap Data
: 100kB /Sec
40GB over
: Chart Data Area (typical Chart size is 30GB)
1GB
: Log Data and User Data area
4GB
: Swap Area
5 years
Result
= 104 GB /Year
= 315 GB /Year
= 3.15 TB /Year
Total = 3.57 TB/Year
= 17.8 TB
Conclusion = 300GB SSD Device shall be used.
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