Last week I was curious to just see how btrfs is faring with RAID5 in xfstests, so I set it up for a quick run with devices configured as: TEST_DEV=/dev/sdb1 # <--- this was a 3-disk "-d raid5" filesystem SCRATCH_DEV_POOL="/dev/sdb2 /dev/sdb3 /dev/sdb4 /dev/sdb5 /dev/sdb6" and fired off ./check -g auto Every test after btrfs/124 fails, because that test btrfs/124 does this: # un-scan the btrfs devices _btrfs_forget_or_module_reload and nothing re-scans devices after that, so every attempt to mount TEST_DEV will fail: > devid 2 uuid e42cd5b8-2de6-4c85-ae51-74b61172051e is missing" Other btrfs tests seeme to have the same problem. If xfstest coverage on multi-device btrfs volumes is desired, it might be a good idea for someone who understands the btrfs framework in xfstests to fix this. Thanks, -Eric
