Hallo,
I've added a fourth device (/dev/sdf1; connected via USB) to my 3-disks-
btrfs bundle (data raid0, metadata raid1), and then I run "balance".
That needed (for about 6 TByte data) about 17 hours.
It finished with
ERROR: error during balancing '/srv/MM' - No space left on device
There may be more info in syslog - try dmesg | tail
The last lines of "dmesg":
btrfs: found 227973 extents
btrfs: relocating block group 26872905728 flags 20
btrfs: found 217765 extents
btrfs: relocating block group 22577938432 flags 20
usb 1-1: reset high-speed USB device number 3 using ehci-pci
usb 1-1: reset high-speed USB device number 3 using ehci-pci
usb 1-1: reset high-speed USB device number 3 using ehci-pci
usb 1-1: reset high-speed USB device number 3 using ehci-pci
usb 1-1: reset high-speed USB device number 3 using ehci-pci
usb 1-1: reset high-speed USB device number 3 using ehci-pci
usb 1-1: reset high-speed USB device number 3 using ehci-pci
btrfs: found 226454 extents
btrfs: relocating block group 21504196608 flags 20
btrfs: found 229068 extents
btrfs: relocating block group 4324327424 flags 20
btrfs: found 214531 extents
btrfs: relocating block group 20971520 flags 18
btrfs: found 92 extents
btrfs: relocating block group 4194304 flags 4
btrfs: 1 enospc errors during balance
What does the last line mean? Is there 1 error during the 17 hours of
balancing? Or has balance ended with "enospc"?
The actual state:
Commands
btrfs fi show
df
Label: 'MM' uuid: 7e94022a-76e7-47f8-954d-1ad69a872bef
Total devices 4 FS bytes used 6.10TB
devid 4 size 1.82TB used 650.03GB path /dev/sdf1
devid 3 size 2.73TB used 1.91TB path /dev/sdd
devid 2 size 1.82TB used 1.68TB path /dev/sdc
devid 1 size 2.73TB used 1.91TB path /dev/sdb
Btrfs Btrfs v0.19
Filesystem 1K-blocks Used Available Use% Mounted on
[...]
/dev/sdb 9767561292 6554878088 2815565072 70% /srv/MM
Viele Gruesse!
Helmut
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