[Bug 172841] New: aacraid does not support TRIM in Raw (Pass Through) devices

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https://bugzilla.kernel.org/show_bug.cgi?id=172841

            Bug ID: 172841
           Summary: aacraid does not support TRIM in Raw (Pass Through)
                    devices
           Product: SCSI Drivers
           Version: 2.5
    Kernel Version: 4.7.4-1.el7.elrepo.x86_64
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: DC395X
          Assignee: scsi_drivers-dc395x@xxxxxxxxxxxxxxxxxxxx
          Reporter: v.badalyan@xxxxxxxxxx
        Regression: No

Created attachment 239601
  --> https://bugzilla.kernel.org/attachment.cgi?id=239601&action=edit
AACRAID get config 1

Have SW raid 10. 8 x Intel SSD

Can't do fstrim.
mount -o discard does not add discard flag to mount point

[root@nas ~]# fstrim -v /mnt/SSD/
fstrim: /mnt/SSD/: the discard operation is not supported

[root@nas ~]# hdparm -I /dev/sdm | grep -i trim
           *    Data Set Management TRIM supported (limit 1 block)
           *    Deterministic read data after TRIM

[root@nas ~]# mount | grep SSD
/dev/md127 on /mnt/SSD type xfs
(rw,relatime,attr2,inode64,sunit=1024,swidth=4096,noquota)

[root@nas ~]# cat /proc/mdstat
Personalities : [raid10]
md127 : active raid10 sdp1[0] sdr1[7] sdn1[6] sdm1[5] sdk1[4] sdl1[3] sdq1[2]
sdo1[1]
      937195520 blocks super 1.2 512K chunks 2 near-copies [8/8] [UUUUUUUU]
      bitmap: 7/7 pages [28KB], 65536KB chunk

unused devices: <none>

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