HP XP P9500 Storage - Manual (Page 225)

/dev/sddlmaa1 1 1018 5238597 83 Linux
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.
2
.
Create an md device.
In the following example, RAID1 (mirroring) is used for the md device:
# mdadm -C /dev/md0 -l1 -n2 /dev/sddlmaa1 /dev/sddlmab1
mdadm: /dev/sddlmaa1 appears to contain an ext2fs file system
size=5238592K mtime=Fri Jan 25 19:26:25 2008
mdadm: /dev/sddlmab1 appears to contain an ext2fs file system
size=5238592K mtime=Fri Jan 25 19:27:07 2008
Continue creating array? y
mdadm: array /dev/md0 started.
3
.
Make sure that the md device has been installed in HDLM.
In the following example, RAID1 (mirroring) is used for the md device:
# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sddlmaa1[0] sddlmab1[1]
5238528 blocks [2/2] [UU]
unused devices:
Make sure that md0 : active and the HDLM devices are displayed.
4
.
If necessary, back up the configuration file.
If the configuration file /etc/mdadm.conf has already been created,
execute the following command to create a backup:
# cp -pr /etc/mdadm.conf /etc/mdadm.conf.backup
5
.
Execute the following command to create a configuration file:
# echo “DEVICE /dev/sddlmaa1 /dev/sddlmab1” >> /etc/mdadm.conf
# mdadm --detail --scan | grep -w “/dev/md0” >> /etc/mdadm.conf
For sddlmaa1 and sddlmab1, specify the HDLM devices corresponding to
md0, which was displayed in step 3.
The following example shows the contents of the created configuration
file:
# cat /etc/mdadm.conf
DEVICE /dev/sddlmaa1 /dev/sddlmab1
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=e39a6b15:32e48a5d:ca05f4db:25bc8af9
For details about the contents of the configuration file, see the Linux
documentation or use the man command.
Creating an HDLM Environment
3-157
Hitachi Dynamic Link Manager User Guide (for Linux(R))