On 2016-07-07 20:58, Chris Murphy wrote:
> I get all kinds of damn strange behaviors in GNOME
> with Btrfs multiple device volumes: volume names appearing twice in
> the UI, unmounting one causes umount errors with the other.
> https://fedoraproject.org/wiki/Changes/Replace_UDisks2_by_Storaged
> http://storaged.org/
Unfortunately BTRFS is a mess from this point of view. Some btrfs subcommand
query the system inspecting directly the data stored on the disks; others use
the ioctl(2) syscall, which provides what the kernel think. Unfortunately, due
to the cache, these two kind of source of information are out of sync.
Often, when some command output don't convince me, I do some "sync"; then
repeating the command the output is better ("btrfs fi show" is one of these
commands).
BR
G.Baroncelli
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