Mirroring 2 drives

PAarcher · 01-28-2005, 09:10 AM

I've got a server with 2 - 36 drives. /dev/sda and /dev/sdb.

/dev/sda has sda1-sda8 already partitioned off. I want to mirror that drive to /dev/sdb.

Can I do that without re-installing?

Thanks for your help.
Trevor

JaseP · 01-28-2005, 10:46 AM

Like a software raid or a backup???

PAarcher · 01-28-2005, 10:59 AM

Just for disk redundancy in case of crash.

verzonnen · 01-28-2005, 11:10 AM

You can try to clone the drive with "dd" like so dd if=/dev/hda of=/dev/hdb
You might need to format the drive first and do all partitions seperate.

There is also a linux tool around that does something like "ghost" just google for it.

Or you can just cp (-Rp i guess) everything from drive 1 to drive 2 (or even use tar)

Have fun

PAarcher · 01-28-2005, 12:00 PM

I'm looking more to set up a raid mirroring to keep the drives in sync. That way if one fails, the other can be brought up and take over.

verzonnen · 01-28-2005, 12:16 PM

mirroring is a good idea, but that would probably require you to to do a reinstall, since I think you have to use logical volumes. Also both drives will be simulltaniously online and a hard drive failure would not crash the system, but you will have to power down to rplace the drive at some point...

PAarcher · 01-28-2005, 02:28 PM

Thanks everyone. I reinstalled and setup RAID 1.