Hi,
Wondering if anyone can help me.
I've got a readynas which uses btrfs - and the meta data is full.
root@ReadyNAS:~# uname -a
Linux ReadyNAS 3.0.101.RN_ARM.4 #1 Mon Jun 29 19:02:35 PDT 2015 armv7l GNU/Linux
root@ReadyNAS:~# btrfs --version
Btrfs v3.17.3
root@ReadyNAS:~# btrfs fi show
Label: '0e36d290:data' uuid: e75a9856-d9e5-4d02-92e6-a217056c69b7
Total devices 3 FS bytes used 5.88TiB
devid 1 size 2.71TiB used 2.71TiB path /dev/md127
devid 2 size 1.82TiB used 1.82TiB path /dev/md126
devid 3 size 1.82TiB used 1.82TiB path /dev/md125
Btrfs v3.17.3
root@ReadyNAS:~# btrfs fi df /data
Data, single: total=6.33TiB, used=5.87TiB
System, RAID1: total=32.00MiB, used=768.00KiB
System, single: total=4.00MiB, used=0.00B
Metadata, RAID1: total=9.00GiB, used=8.98GiB
Metadata, DUP: total=3.00GiB, used=2.12GiB
At some point (I dont know if its btrfs, or some Readynas process) -
the filesystem goes readyonly.
This seems to scupper most attempts at fixing things.
I've tried all sorts,I've tried deleting off files - but - when the
machine reboots they re-appear, various different "btrfs balance" type
commands - they seem to exit because of lack of free space - eg
# btrfs balance start /data -dlimit=3 -v
Dumping filters: flags 0x1, state 0x0, force is off
DATA (flags 0x20): balancing, limit=3
ERROR: error during balancing '/data' - No space left on device
There may be more info in syslog - try dmesg | tail
# dmesg | tail
BTRFS error (device md125) in __btrfs_free_extent:5648: errno=-28 No space left
BTRFS info (device md125): forced readonly
BTRFS debug (device md125): run_one_delayed_ref returned -28
BTRFS error (device md125) in btrfs_run_delayed_refs:2688: errno=-28
No space left
BTRFS error (device md125) in __btrfs_free_extent:5648: errno=-28 No space left
BTRFS debug (device md125): run_one_delayed_ref returned -28
BTRFS error (device md125) in btrfs_run_delayed_refs:2688: errno=-28
No space left
BTRFS error (device md125) in __btrfs_free_extent:5648: errno=-28 No space left
BTRFS debug (device md125): run_one_delayed_ref returned -28
BTRFS error (device md125) in btrfs_run_delayed_refs:2688: errno=-28
No space left
Nothing seems to fix it, every time I reboot - I get the same 8.98GB
used out of 9GB
I tried the readynas forum - the advice seemed to be wipe the device
and start again...
Any suggestion before I just wipe the /data and start again ?
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