[CentOS] Disc Cloning Question
John R Pierce
pierce at hogranch.com
Tue Apr 6 22:08:08 UTC 2010
Joseph L. Casale wrote:
>> If I were doing it, I'd forget lvm on the new drive and just make the md
>> devices, mkfs them, mount them somewhere temporarily, copy stuff over
>> with 'cp -a', 'tar | tar', 'dump | restor', 'rsync -av', etc.,
>> edit fstab to mount the new md devices for / and /boot, fix grub and
>> swap the drives. If you have to worry about growing files, do an rsync
>> once live, then go to single user mode and repeat (the second run will
>> fix anything that changed and will go pretty quickly).
> I'm sold, it really doesn't need lvm. I presume after editing fstab the
> nonexistent lvm config can be ignored? Never done that...
you can use the dump ... | restore thing with lvm, it doesn't care.
What _I_ do, anyways is...
* build new storage however I like,
* reboot to single user
* temp mount new filesystems as /new/.... (eg, / is /new, /var is
/new/var, /new/home, etc)
* for each file system,
dump -0uf - /dev/mapper/VolGroup..... | (cd /new/... ;
restore -rvf - )
* manually fix up boot stuff, manually edit /new/etc/fstab
* umount new stuff, shut down, juggle disks, pray it works...
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