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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