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I have a five 4TB usb drives. I want to setup a mount point, /mnt/backups so that when I plug in any of those drives, they get automatically mounted to /mnt/backups.

The problem is that when the drive path changes all the time for the drives even though I put them in the same usb slot. I've seen /dev/sde1 through /dev/sdh1...

OS is Ubuntu.

migrated from serverfault.com Jul 3 '13 at 13:08

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  • What version of Ubuntu are you using? Is it the server or desktop version? – Ernie Jul 2 '13 at 15:37
  • It's the server version. – Chris G. Jul 2 '13 at 15:40
  • And the version number? – Ernie Jul 2 '13 at 15:45
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Have a look at /dev/disk. There are some other ways to access the devices. by-path may suit your needs, dependent from the usb controllers in your drives. If this does not work you might just label (e2label(8)) your partitions and use by-label.

  • How do I mount a drive by its path? I'm assuming if I can mount a drive by-path then I can plug a different drive into the same usb slot and it will work. – Chris G. Jul 2 '13 at 15:40
  • in the by-path folder are symlinks to e.g. /dev/sde1. So you can just mount /dev/disk/by-path/pci-0000:01:00.0-scsi-0:0:0:0-part1 /mnt/backups. Some for by-path – krissi Jul 3 '13 at 7:45
  • And in laymens terms that path references the usb slot? – Chris G. Jul 3 '13 at 12:05
  • That depends on your drives usb controller. Just plug in your devices and check if the path changes. If you want to be sure use the by-label way. – krissi Jul 3 '13 at 12:35
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My understanding is that you can use udev to define the disk locations as static as well.

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I don't know about your Ubuntu version, but 12.04 LTS will automatically mount USB devices and put them in /media/disklabel, where 'disklabel' is the actual name of the disk according to the partition metadata. This makes the path of the disk consistent across each mounting.

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