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amulet_linux
n00b
Joined: 26 Apr 2014
Posts: 65
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 Posted: Mon Mar 09, 2015 11:51 pm Post subject: LVM snapshot mounted instead root partition |
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Recently I started using the snapshot features of LVM just for testing, I have a snapshot partition and my usual root (/) partition
I was surprised when noticed Gentoo mounted the wrong partition even my fstab is perfect
I guess I have to use UUID from now on fstab
I don't know what happened
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frostschutz
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Joined: 22 Feb 2005
Posts: 2977
Location: Germany
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| Posted: Tue Mar 10, 2015 12:21 am Post subject: |
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if the snapshot represents a 1:1 copy of the block device with your filesystem on, then you have 2 block devices with the same UUID, so if you mount by UUID, it could pick the wrong one if you're unlucky.
since LVM also provides unique device name ( /dev/vgname/lvname or /dev/mapper/vg-lv ) those might be preferrable if you're going to have such snapshot copies around.
alternatively you could change the UUID of the snapshot as you create it... |
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amulet_linux
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Joined: 26 Apr 2014
Posts: 65
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| Posted: Tue Mar 10, 2015 12:52 am Post subject: |
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| frostschutz wrote: | if the snapshot represents a 1:1 copy of the block device with your filesystem on, then you have 2 block devices with the same UUID, so if you mount by UUID, it could pick the wrong one if you're unlucky.
since LVM also provides unique device name ( /dev/vgname/lvname or /dev/mapper/vg-lv ) those might be preferrable if you're going to have such snapshot copies around.
alternatively you could change the UUID of the snapshot as you create it... |
I see, that is the problem, I was already using UUID, I forgot completely
Thank you
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