Migrating To Md Devices For Which The Multipath Function Is Used - Hitachi XP P9500 User Manual

Disk /dev/sddlmaa: 5368 MB, 5368709120 bytes
166 heads, 62 sectors/track, 1018 cylinders
Units = cylinders of 10292 * 512 = 5269504 bytes
Device Boot
/dev/sddlmaa1
autodetect
Command (m for help): w
The partition table has been altered!
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]
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.
.

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
Device Is Moved to a SCSI Device (An Environment that Uses the md Device's
MULTIPATH Functionality) on page
uninstall HDLM, carry out the steps before the uninstallation.
3-212
Start
1
5238528 blocks [2/2] [UU]
Figure 3-40 Device Configuration When an md Device on an HDLM
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide (for Linux(R))
End Blocks
1018 5238597
3-213, carry out the procedure below. To
Id System
fd Linux raid