Hitachi XP P9500 User Manual page 330

3. Creating an HDLM Environment
Calling ioctl() to re-read partition table.
Syncing disks.
Also perform the above operation for
12. Execute the following command to activate the md device:
# mdadm -As /dev/md0
mdadm: /dev/md0 has been started with 2 drives.
13. Make sure that the md device has been activated.
In the following example, RAID1 (mirroring) is used for the md device:
# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdh1[0] sdi1[1]
5238528 blocks [2/2] [UU]
unused devices: <none>
Make sure that
14. If you need to mount the file systems on the md device, mount them.
(2) Migrating to md Devices for which the MULTIPATH Function Is Used
This section describes the procedure for migrating an environment where md devices
were created on an HDLM device to an environment where the md devices were
created on a SCSI device. The example below describes how to migrate the md devices
created on the HDLM device for which the LINEAR function is used to the md devices
created on the SCSI device for which the MULTIPATH function is used.
In this procedure, the device
on
/dev/md0
Figure 3-40: Device Configuration When an md Device on an HDLM Device Is
Moved to a SCSI Device (An Environment that Uses the md Device's MULTIPATH
Functionality), carry out the procedure below. To uninstall HDLM, carry out the steps
before the uninstallation.
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and the SCSI devices are displayed.
md0 : active
/dev/md0
and
/dev/sdh1 /dev/sdo1
.
/dev/sddlmab
on is migrated to the device
/dev/sddlmaa1
. To create the environment shown in