On 11/10/2015 12:00 PM, Christer Solskogen wrote:
This is the first I found.
http://linux.slashdot.org/story/15/07/30/1814200/samsung-finds-fixes-bug-in-linux-trim-code
That bug isn't specific to Samsung drives. It affected all SSDs used in
raid0 and raid10 configurations.
and https://bugs.launchpad.net/ubuntu/+source/fstrim/+bug/1449005
That's a different bug, entirely. The bug above was a Linux bug, where
this is a drive firmware bug. It's worked around in Linux by
blacklisting NCQ TRIM for Samsung's drives.
The ATA_HORKAGE_NO_NCQ_TRIM flag was introduced in 3.13. I don't see it
in CentOS 7's kernel, so it's almost certainly not in C6 either.
You're probably better off disabling NCQ or just testing to see if you
need TRIM at all. Particularly if you leave some space unallocated on
the drive (TRIM it if you were previously using it), many newer drives
manage free blocks very well, and see little or no performance hit for
systems that don't use TRIM.
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
https://lists.centos.org/mailman/listinfo/centos
