HP Hitachi Dynamic Link Manager Software - Manual (Page 328)

3. Creating an HDLM Environment
304
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]
unused devices: <none>
Make sure that
md0 : active
is not displayed.
9. Check the correspondence between the HDLM devices and SCSI devices.
Execute the HDLM-configuration definition utility
dlmcfgmgr
with the
-v
parameter specified:
# dlmcfgmgr -v
HDevName Management Device Host Channel Target Lun
/dev/sddlmaa configured /dev/sdh 1 0 0 0
/dev/sddlmab configured /dev/sdi 1 0 0 1
KAPL10302-I /sbin/dlmcfgmgr completed normally.
The
HDevName
and
Device
columns display HDLM devices and SCSI devices,
respectively.
10. Edit the configuration file.
Based on the correspondence between the HDLM devices and SCSI devices