HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 236)

Figure 3-12 Device Configuration Where an md Device on a SCSI Device Is
Migrated to an HDLM Device (An Environment that Uses the md Device's
RAID Functionality)
To migrate /dev/md0:
1
.
Stop all applications that are using the existing md device.
2
.
If necessary, back up the application data residing on the md device.
3
.
If file systems have been mounted on the md device, unmount them.
4
.
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 sdh1[0] sdi1[1]
5238528 blocks [2/2] [UU]
unused devices:
Make sure that md0 : active and that SCSI devices are displayed.
If md0 : active is not displayed, activate the md device.
5
.
If you have already used a configuration file (/etc/mdadm.conf), back up
that file.
Execute the following command to back up that configuration file:
# cp -pr /etc/mdadm.conf /etc/mdadm.conf.backup
6
.
Execute the following command to create a configuration file:
Even if a configuration file had already been used in step 5, you still need
to create a configuration file so that the md device will be managed by
HDLM.
# echo "DEVICE /dev/sdh1 /dev/sdi1" >> /etc/mdadm.conf
3-164
Creating an HDLM Environment
Hitachi Dynamic Link Manager (for Linux®) User Guide