Ubuntu
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  1. Bug #706795
  2. Comment #3

Comment 3 for bug 706795

Revision history for this message
Eugene San (eugenesan) wrote : Re: [All releases] Suspending with rootfs on USB, causes silent corruptions, kernel panic on mount attempt, data loss and leaving system unbootable.

Hi all,

Update:
1) Corruptions are always there when suspending rootfs on USB.
2) Corruptions are silent, FS marked as clean, that's what causes Kernel panic when it tries to mount corrupted FS marked as clean.
3) Issue caused probably by partially synced disk cache.
4) All tested Kernels affected (Lucid, Maverick, Natty, Natty-Mainline-Daily, Fedora14, Redhat6).
5) Kernels above 2.6.38 manages to mark FS as dirty during failed mount attempt, so virtually corruption got fixed after 2 reboots but loss is there.
6) Bug affects all filesystems, but severe for EXT4(data loss but fixable with another system without automount) and BTRFS (unfixable due to failed mounttime fixes and there is no way to fix manually).