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296218
2009 Nov 18
1
To loop or not to loop with btrfs
Hi,
This left me puzzled for a while:
22:29 borg:/ # losetup /dev/loop1 /.B.disk
22:29 borg:/ # mount /dev/loop1 /B
mount: /dev/loop1: can''t read superblock
22:29 borg:/ # blkid /dev/loop1
/dev/loop1: UUID="e19fe89b-cde3-4ccc-bc70-b759a57bd1c9"
UUID_SUB="f29c6218-d040-4546-a227-4dd2d2142817" TYPE="btrfs"
22:29 borg:/ # losetup -d /dev/loop1
22:29 borg:/ # losetup /dev/loop2 /.B.disk
22:29 borg:/ # mount /dev/loop2 /B
(success)
So the btrfs volume is tied to loop2? That certainly is not good.
Even real disks (/dev/sd*) can move around, the...