write&read-back iops for DC S3500

[SStev8]

I am testing my DC S3500 SSD. I found the write iops and read iops are all OK.

AS SSD:

4K bytes read 7K iops,

4K bytes write: 15K iops

512 bytes read 18K iops

512 bytes write 18K iops

Mixed read /write still alright:

Diskspd:

random 4k bytes 50% read, 50% write: 6k iops.

But when I tried write & read-back, i.e. random write but immediate read back from same position, I got terrible figure:

random 4k bytes write then read-back: 1000 iops only.

Is there anything wrong for write&read-back?

Regards

Steve

[SStev8]

BTW, though SSD has data integrity internally, I still need keep around the codes to detect data corruption, as required by regulator. That's why I am testing the read-back. Thanks.

Regards

Steve

[idata]

steveau,

Could you please try this tool called http://www.iometer.org/doc/downloads.html IOmeterhttp://www.iometer.org/doc/downloads.html you can find the information on how to run this tool from page 10 on this http://www.intel.com/content/dam/support/us/en/documents/ssdc/hpssd/ssd-750/sb/intel_ssd_750_series_... guide Also, could you please use http://crystalmark.info/software/CrystalDiskMark/index-e.html Crystal Disk Mark as well and provide us a screenshot of the results of both tests?Best regards,Aleki

[idata]

steveau,

We're following up on your thread since we have not heard back from you.If you're still interested in continuing with the support, or you issue has been resolved, please let us know. Best regards,Carlos A.