[DRBD-user] I need help

Lars Ellenberg Lars.Ellenberg at linbit.com
Wed Feb 11 19:01:22 CET 2004


/ 2004-02-10 16:55:26 -0800
\ Laurel Johnson:
>   
> I want to implement drbd  on  2 Linux machines.  One of the Linux
> machines already has the file system on it.  It is also running a RAID.
> My questions are: Can I run drbd with a RAID on one machine but not on
> the other?  Can  I implement drbd  as is or do I have to backup all my
> files and start from scratch?

PLEASE, no html mail, at least not on this list.

drbd [mostly] does not care whether you stack it on top of
IDE, SCSI, software RAID, hardware RAID or whatever.

You should have a backup allways, anyways ;).
Using RAID does not mean you no longer need to backup your data.

But since DRBD is "transparent", you can leave your data in place. 
No need for an extra backup/restore cycle, you just
umount /dev/where/it/is/now,
configure drbd to use /dev/where/it/is/now as its lower level device,
edit fstab to no longer reference the old location, but either
delete that line (and configure heartbeat if you want the
Filesystem resource to mount it) or replace it with the /dev/nbX
it is now supposed to be.

Then start drbd, make it primary, and mount /dev/nbX .

	Lars

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