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Re: mdraid on SSD - use scterc?




On 06/16/18 22:22, Richard Hector wrote:
I've got a new server with 2 mdraid RAID 1 arrays - one on spinning disks, the other on SSDs. The spinners are set by default to use
ERC; the SSDs are not, but appear to support it.

Should I enable it on the SSDs?

Enabling SCT Error Recovery Control seems to be conventional and recommended for RAID, regardless of drive type (HDD or SSD) [1]. I have it enabled on the HDD's in my md array.


Or are they not prone to failure in
such a way that it would be useful?

On 06/17/18 05:42, Richard Hector wrote:
INTEL SSDSC2KW256G8 (545s series)
That looks like a high-end consumer SSD [2]. I don't see anything obvious in the specifications summary that would preclude enabling SCT Error Recovery Control.


David


References:

[1] https://forums.freenas.org/index.php?threads/checking-for-tler-erc-etc-support-on-a-drive.27126/

[2] https://ark.intel.com/products/125020/Intel-SSD-545s-Series-256GB-2_5in-SATA-6Gbs-3D2-TLC