On Mon, Oct 25, 2010 at 6:31 AM, Jérôme Poulin <jeromepou...@gmail.com> wrote:
> On Sun, Oct 24, 2010 at 5:32 PM, Jérôme Poulin <jeromepou...@gmail.com> wrote:
> ...
>> p4 jerome # btrfs device scan /dev/dm-22
>> Scanning for Btrfs filesystems in '/dev/dm-22'
>> p4 jerome # echo $?
>> 0
> This is OK.
>
>> p4 jerome # btrfs device scan /dev/sda
>> Scanning for Btrfs filesystems in '/dev/sda'
>> ERROR: unable to scan the device '/dev/sda'
>> p4 jerome # echo $?
>> 11
> ...
> But isn't that error misleading, btrfs scan was succesfully able to
> scan /dev/sda, but, it doesn't contain btrfs, right?
imo, the best way is:
# root must be btrfs else silent return
[ "$(blkid -s TYPE -o value ${root})" = btrfs ] || return 0
at least that the way i do it in my initramfs hook; seems to be reliable.
C Anthony
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