Unfortunately XFS also repeatedly swallowed a number of my volumes. I
found it to be more unstable than any filesystem I have used (save
VxFS). When using XFS, one must not read from the underlying device, or
one risks corruption.
In Linux, doing this on *any* filesystem will potentially cause corruption.
This is why e2dump/e2restore are *unsafe* and not to be used.
Raw I/O operations bypass the buffer cache, so of course it'd be corrupted.
If you're dicking with device access while a partition is mounted and you lose data, you deserve what you get. This behavior has been a no-no forever.
This leads one to believe that using XFS on LVM,
md, or enbd would be somewhat risky.I dunno what 'enbd' is, but XFS on LVM or md is perfectly safe. They're kernel drivers for starters, so they can coordinate block I/O operations. They also sit below XFS in the I/O layer, XFS just sees them as another partition.
I dunno how you came across this conclusion at all.
ADam
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