Storage Setup

The storage array needs to be configured.

Install the sg3_utils and multipath packages:

Rocky Linux 8 and 9

dnf -y install sg3_utils device-mapper-multipath

Run the following command:

rescan-scsi-bus.sh

To use multipath copy the multipath.conf file into /etc:

cp /usr/share/doc/device-mapper-multipath/multipath.conf /etc

Add the following changes:

devices {
        device {
                vendor COMPELNT
                product "Compellent Vol"
                path_checker tur
                prio alua
                path_selector "service-time 0"
                path_grouping_policy group_by_prio
                no_path_retry 24
                hardware_handler "1 alua"
                failback immediate
                rr_weight priorities
        }
}

Enable multipath at boot and start it:

systemctl enable multipathd
systemctl start multipathd

Now run the following to check the Compellant is visible:

multipath -ll
mpatha (36000d31003828e000000000000000005) dm-3 COMPELNT,Compellent Vol
size=250T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 8:0:1:1 sde 8:64 active ready running
| `- 1:0:1:1 sdc 8:32 active ready running
`-+- policy='service-time 0' prio=1 status=enabled
  |- 8:0:0:1 sdd 8:48 active ready running
  `- 1:0:0:1 sdb 8:16 active ready running

In our case, the file system showed up as /dev/mapper/mpatha so we should create an xfs file system and add a label to that with the following:

mkfs.xfs -L RAID -f /dev/mapper/mpatha

Now we can edit the /etc/fstab and add the following line:

LABEL=RAID /raid xfs defaults,discard,prjquota 0 0

Rocky Linux 8 and 9

You need to run the following to reload the fstab changes:

systemctl daemon-reload

Finally, mkdir the mount point and then mount the file system

mkdir /raid
mount /raid

That should be it.

Issues after a reboot

After a reboot it may be that the storage just mounts as a normal SCSI device. To fix this, unmount it, rerun the rescan-scsi-bus.sh command and restart the multipathd. Once that is done, remount the raid and it should show as /dev/mapper/mpatha again and multipath -ll will return the correct output.

Next Step

Go to the XFS-User-and-Project-Quotas page.