HP Hitachi Dynamic Link Manager Software User Manual

Page 260

3. Creating an HDLM Environment

236

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

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.

Edit the configuration file created in step 5.
Edit the

/etc/mdadm.conf

file to add

auto=yes

to the

ARRAY

line:

DEVICE /dev/sddlmaa1 /dev/sddlmab1
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=e39a6b15:32e48a5d:ca05f4db:25bc8af9 auto=yes

Restart the host.

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 sddlmaa1[0] sddlmab1[1]
5238528 blocks [2/2] [UU]
unused devices:

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