Hitachi Dynamic Link Manager Software Users Guide for Linux

to a SCSI Device (An Environment that Uses the md Device's RAID
Functionality) on page 3-217, carry out the procedure below.
To remove HDLM, carry out the steps before the removal.
Figure 3-25 Device Configuration When an md Device on an HDLM Device
Is Moved to a SCSI Device (An Environment that Uses the md Device's
RAID Functionality)
To migrate /dev/md0:
1. Stop the host and change the multi-path configuration to a single-path
configuration.
2. Start the host.
3. Stop all applications that are using the existing md device.
4. If necessary, back up the application data residing on the md device.
5. If file systems have been mounted on the md device, unmount them.
6. Check the status of the md device.
Execute the following command to check the configuration of the md
device:
# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sddlmaa1[0] sddlmab1[1]
5238528 blocks [2/2] [UU]
unused devices: <none>
Make sure that md0 : active and the HDLM devices are displayed:
7. Execute the following command to deactivate the md device:
# mdadm -Ss /dev/md0
8. Make sure that the md device has been deactivated.
In the following example, RAID1 (mirroring) is used for the md device:
# cat /proc/mdstat
Personalities : [raid1]
Creating an HDLM Environment
3-217
Hitachi Dynamic Link Manager (for Linux®) User Guide