How do you determine which physical device is 'under' a given mount point?

Question

Is there a command that tells you the device name (ie. "/dev/sda1"), when you give it a mount point (ie. "/home")?

I'm running Ubuntu Server 9.04.

wfaulk · Accepted Answer · 2009-09-25 22:14:16Z

2

df -k /home

and

mount

answered Sep 25, 2009 at 22:14

wfaulk

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Matt · Accepted Answer · 2009-09-25 22:17:53Z

4

df, mount, or just cat /etc/fstab.

If the actual physical device is hidden behind software RAID (eg, you see /dev/md), then cat /proc/mdstat will uncover that layer.

And if there's a blanket of LVM (eg, you see something like /dev/LogVol00), use pvdisplay.

answered Sep 25, 2009 at 22:17

Matt

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when you use cat though, doesn't it just tell you what's supposed to be mounted, not what actually is? If you had a typo in /etc/fstab, the entry would be there, but the device might not actually be mounted due to the error.
– Nick
Sep 25, 2009 at 22:33
For /etc/fstab, you're exactly correct.
– Matt
Sep 25, 2009 at 22:34

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2 Answers 2