SVM soft partition mirroring in a sun cluster setup

Saturday, August 8, 2009 at 4:52 AM
Cannot do the mirror directly. Can be created soft partitions on a
non-mirror device. This device cannot be mirrored

Step1:

Save the soft partition information

metastat -p -s setname | grep d100 > d100.conf

setname = your setname

d100 = the device you want to mirror

remove the line which creates d100 itself from the file

Step2:

delete all soft partitions on d100

metaclear -s setname d240 d230 d220

Step3

Create a mirror device

metarename -s setname d100 d101

metainit -s setname d100 -m d101

Step4:

Recreate the soft partitions

mv d100.conf /etc/lvm/md.tab

metainit -a

Step5:

Attach a second mirror to d100:

Step6:

create a metadevice d102 of at least the same size than d101

Step7:

Attach it to d100:

metattach -s setname d100 d102

Just wait to complete the sync

Step8:

Detach the old one:

metadetach -s setname d100 d101

Step9:

If the new device was larger, enlarge d100 also

metainit -s setname d100

Step10:

Get rid of d101

metaclear -s setname d101

Note:It is always a good practise to first create a (one way) mirror on a simple or striped metadevice and use same for creating soft partitions.

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