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Have multiple drives on the server. I'm booting up to rescue mode and seems like the /dev/sd* do not map in the same sequence as normal.

What is the best way to figure out which drive is which? Perhaps just giving me the manufacture information or by connection?

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There are a lot of different approaches. First you can try mounting the various /dev/sd* devices and looking at their contents.

If you're using LVM, the volumes should appear in /dev/vgname/lvname no matter what /dev/sd* devices they come up as. Same for software raid devices (MD).

If your disks have labels, there is probably a map in /dev/disk/by-label.

If you keep your fstab by UUID (not a bad idea), there's a map in /dev/disk/by-uuid/.

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  • Hm, I don't seem to have by-label on my box (Fedora 13). Dec 19 '10 at 5:21
  • I just found parted -l and like that option better but thanks! Dec 22 '10 at 10:44
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Look at the symlinks in /dev/disk/by-id.

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I use the command: df -a

It shows the name of each device /dev/sd* and where its mounted, it also gives some filesystem usage statistics.

Also you could look at the contents of /etc/fstab but if your devices aren't mapping as usual, then maybe this file won't be correct.

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