I have a file system that I can show, check, but not rebalance:
1 [4/3420]mh@fan:~ $ sudo btrfs fi show /dev/mapper/banana-root
Label: none uuid: b2906231-70a9-46d9-9830-38a13cb73171
Total devices 1 FS bytes used 1.82GiB
devid 1 size 6.00GiB used 3.69GiB path /dev/mapper/banana-root
1 [10/3426]mh@fan:~ $ sudo btrfs check /dev/mapper/banana-root
Checking filesystem on /dev/mapper/banana-root
UUID: b2906231-70a9-46d9-9830-38a13cb73171
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
found 1954635785 bytes used err is 0
total csum bytes: 1833964
total tree bytes: 75907072
total fs tree bytes: 64241664
total extent tree bytes: 7843840
btree space waste bytes: 21224578
file data blocks allocated: 2168119296
referenced 2088648704
[11/3427]mh@fan:~ $ sudo btrfs balance /dev/mapper/banana-root
ERROR: not a btrfs filesystem: /dev/mapper/banana-root
1 [12/3428]mh@fan:~ $
The filesystem is on a logical volume which is on a PV which is in a
loop device that is on a disk file:
[12/3428]mh@fan:~ $ sudo lvs
LV VG Attr LSize
root banana -wi-a---p- 6,00g
[13/3429]mh@fan:~ $ sudo vgs
VG #PV #LV #SN Attr VSize VFree
banana 1 2 0 wz-pn- 7,16g 164,00m
[14/3430]mh@fan:~ $ sudo pvs
PV VG Fmt Attr PSize PFree
[unknown] banana lvm2 a-m 7,16g 164,00m
(no idea why this says "unknown" here, it is
[15/3431]mh@fan:~ $ ls -al /dev/mapper/loop0p2
lrwxrwxrwx 1 root root 8 Jan 21 14:40 /dev/mapper/loop0p2 -> ../dm-39
[16/3432]mh@fan:~ $ ls -al /dev/dm-39
brw-rw---- 1 root disk 254, 39 Jan 21 14:40 /dev/dm-39
[24/3440]mh@fan:~ $ sudo kpartx -l banana.sdcard
loop0p1 : 0 497664 /dev/loop0 2048
loop0p2 : 0 15024128 /dev/loop0 499712
[25/3441]mh@fan:~ $ sudo losetup --list
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE DIO
/dev/loop0 0 0 0 0 /home/mh/banana.sdcard 0
[26/3442]mh@fan:~ $
Can a btrfs be so broken that btrfs balance doesn't recognize it any
more? What is going on with this file system?
Greetings
Marc
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Marc Haber | "I don't trust Computers. They | Mailadresse im Header
Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402
Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600421
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