On Mon, Mar 28, 2016 at 08:42:37PM +0200, Marc Haber wrote: > On Mon, Mar 28, 2016 at 04:37:14PM +0200, Marc Haber wrote: > > I have a btrfs which btrfs check --repair doesn't fix: > > > > # btrfs check --repair /dev/mapper/fanbtr > > bad metadata [4425377054720, 4425377071104) crossing stripe boundary > > bad metadata [4425380134912, 4425380151296) crossing stripe boundary > > bad metadata [4427532795904, 4427532812288) crossing stripe boundary > > bad metadata [4568321753088, 4568321769472) crossing stripe boundary > > bad metadata [4568489656320, 4568489672704) crossing stripe boundary > > bad metadata [4571474493440, 4571474509824) crossing stripe boundary > > bad metadata [4571946811392, 4571946827776) crossing stripe boundary > > bad metadata [4572782919680, 4572782936064) crossing stripe boundary > > bad metadata [4573086351360, 4573086367744) crossing stripe boundary > > bad metadata [4574221041664, 4574221058048) crossing stripe boundary > > bad metadata [4574373412864, 4574373429248) crossing stripe boundary > > bad metadata [4574958649344, 4574958665728) crossing stripe boundary > > bad metadata [4575996018688, 4575996035072) crossing stripe boundary > > bad metadata [4580376772608, 4580376788992) crossing stripe boundary > > repaired damaged extent references > > Fixed 0 roots. > > checking free space cache > > checking fs roots > > checking csums > > checking root refs > > enabling repair mode > > Checking filesystem on /dev/mapper/fanbtr > > UUID: 90f8d728-6bae-4fca-8cda-b368ba2c008e > > cache and super generation don't match, space cache will be invalidated > > found 97171628230 bytes used err is 0 > > total csum bytes: 91734220 > > total tree bytes: 3021848576 > > total fs tree bytes: 2762784768 > > total extent tree bytes: 148570112 > > btree space waste bytes: 545440822 > > file data blocks allocated: 308328280064 > > referenced 177314340864 > > Mounting this filesystem gives: > Mar 28 20:25:18 fan kernel: [ 20.979673] BTRFS error (device dm-16): could > not find root 8 > Mar 28 20:25:18 fan kernel: [ 20.979739] BTRFS error (device dm-16): could > not find root 8 > Mar 28 20:25:18 fan kernel: [ 20.980900] BTRFS error (device dm-16): could > not find root 8 > Mar 28 20:25:18 fan kernel: [ 20.980948] BTRFS error (device dm-16): could > not find root 8 > Mar 28 20:25:18 fan kernel: [ 20.981428] BTRFS error (device dm-16): could > not find root 8 > Mar 28 20:25:18 fan kernel: [ 20.981472] BTRFS error (device dm-16): could > not find root 8 > > which is not detected by btrfs check. > > What is going on here?
"Could not find root 8" is harmless (and will be going away as a message soon). It just means that systemd is probing the FS for quotas, and you don't have quotas enabled. Hugo. -- Hugo Mills | Hey, Virtual Memory! Now I can have a *really big* hugo@... carfax.org.uk | ramdisk! http://carfax.org.uk/ | PGP: E2AB1DE4 |
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