Hitachi Dynamic Link Manager, User Manual

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3. Creating an HDLM Environment
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Calling ioctl() to re-read partition table.
Syncing disks.
Also perform the above operation for
/dev/sddlmab
.
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
md0 : active
and the SCSI devices are displayed.
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
/dev/md0
on
/dev/sddlmaa1
is migrated to the device
/dev/md0
on
/dev/sdh1
and
/dev/sdo1
. To create the environment shown in
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.