Hello Hugo,
thanks for your ultrafast reply.
Unfortunately, it does not work for me:
[root@homeserver mnt2]# btrfs filesystem resize 80G /mnt2/Data_Store/ &&
btrfs replace start /dev/sdb4 /dev/sda4 /mnt2/Data_Store/ -f && btrfs
filesystem resize max /mnt2/Data_Store/
Resize '/mnt2/Data_Store/' of '80G'
ERROR: target device smaller than source device (required 119121379328
bytes)
[root@homeserver mnt2]# btrfs filesystem show /mnt2/Data_Store/
Label: 'Data_Store' uuid: 0ccc1e24-090d-42e2-9e61-d0a1b3101f93
Total devices 1 FS bytes used 47.95GiB
devid 1 size 80.00GiB used 66.03GiB path /dev/sdb4
[root@homeserver mnt2]# lsblk | grep sda4
└─sda4 8:4 0 103.5G 0 part
Greetings,
Hendrik
On 09.03.2016 22:50, Hugo Mills wrote:
On Wed, Mar 09, 2016 at 10:46:09PM +0100, Hendrik Friedel wrote:
Hello,
I intend to move this subvolume to a new device.
btrfs fi show /mnt2/Data_Store/
Label: 'Data_Store' uuid: 0ccc1e24-090d-42e2-9e61-d0a1b3101f93
Total devices 1 FS bytes used 47.93GiB
devid 1 size 102.94GiB used 76.03GiB path /dev/sdb4
(fi usage at the bottom of this message)
The new device (sda4) is 8G smaller unfortunately.
sda 8:0 0 111.8G 0 disk
└─sda4 8:4 0 103.5G 0 part
sdb 8:16 0 119.2G 0 disk
└─sdb4 8:20 0 111G 0 part /mnt2/Data_Store
Thus, btrfs replace does not work
What would you suggest now to move the FS (it does contain many subvolumes)?
btrfs dev resize to shrink it to (slightly smaller than) the
replacement device, then btrfs replace should work. Then btrfs dev
resize max to fill up the replacement device completely.
Hugo.
I tried btrfs send /mnt2/Data_Store/read_only_snapshot/ | btrfs
receive /mnt/sda4/
but this only created an empty subvolume /mnt/sda4/read_only_snapshot/
So, then
btrfs device add /dev/sda4 /mnt/Data_Store
btrfs balance start /mnt/Data_Store
btrfs device remove /dev/sdb4 /mnt/Data_Store
?
Or is there a better option?
Regards,
Hendrik
btrfs fi usage /mnt2/Data_Store/
Overall:
Device size: 102.94GiB
Device allocated: 74.03GiB
Device unallocated: 28.91GiB
Device missing: 0.00B
Used: 47.96GiB
Free (estimated): 53.24GiB (min: 53.24GiB)
Data ratio: 1.00
Metadata ratio: 1.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:69.00GiB, Used:44.67GiB
/dev/sdb4 69.00GiB
Metadata,single: Size:5.00GiB, Used:3.29GiB
/dev/sdb4 5.00GiB
System,single: Size:32.00MiB, Used:16.00KiB
/dev/sdb4 32.00MiB
Unallocated:
/dev/sdb4 28.91GiB
---
Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft.
https://www.avast.com/antivirus
---
Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft.
https://www.avast.com/antivirus
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
