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07-28-2015 12:09 AM
07-28-2015 12:09 AM
Move LUNs a disk array to another with LVM mirror
My technical background is HP-UX systems. When we migrate systems to another storage cabinet we do it using LVM mirroring. We only stop the services to reconfigure the cluster lock disk.
I don’t have much experience with Linux RedHat and I’d like to know if there is a similar method available. If possible please indicate the general procedure and commands (as they are slightly different). In our environment we have multipath and Service Guard.
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07-31-2015 09:01 AM
07-31-2015 09:01 AM
Re: Move LUNs a disk array to another with LVM mirror
hello,
unfortuanately , there is nothing as practical on RHEL than HP-UX 's "lvextend -m 2 mylv mynewpvs"
To transfer our VGs from one array to another on RHEL servers, we used the "pvmove" command, that move the PEs one by one from one regular PV to another.
it doesn't care about the LVs above it , just make sure the destination is big enough..
the general syntax is
pvmove -i 120 /dev/mpath/mpath42OLD /dev/mpath/mpath144NEW
( the -i 120 is for displaying completion rate every 2 minute)
That's no true 3-way mirroring, but it is the closest for an online migration.
regarding MC/SG quorum disk migration with it, I have no experience whether it works or not.
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07-31-2015 09:18 AM
07-31-2015 09:18 AM
Re: Move LUNs a disk array to another with LVM mirror
Here is some information mirroring in RHEL:
Hopefully this helps.
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09-08-2015 12:17 PM
09-08-2015 12:17 PM
Re: Move LUNs a disk array to another with LVM mirror
If you know HPUX LVM well, I don't believe you'll have any troubles. The only thing I've found missing is PVGs, and I've not seen lots of people using that to begin with.