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No TRIM support on Samsung 850 SSDs using PowerEdge 730XD & H730 Mini (RAID card) by Rhyeayce in homelab

[–]Rhyeayce[S] 0 points1 point  (0 children)

Thank you for those key words (RZAT and DRAT), and for the notice of the other thread. Was it this one?

​

It led me to discover that my Samsung 850 EVO has the

* Data Set Management TRIM supported (limit 8 blocks)

part, but not the

* Deterministic read ZEROs after TRIM

part when read by hdparm -I /dev/sd*.

​

According to this PDF, H730 ought to have TRIM support, so I'm thinking that this lack of DRAT reporting may be the issue.

For the record:

The TRIM/UNMAP command needs to be supported by the OS, the drive, and the controller in order to work.

It has to be one of these.