Hi, I was trying to remove a 'missing' drive from a raid1 setup. It was suggested on this list that I update to HEAD. I updated my kernel to Ubuntu-lts-2.6.37-2.9, which appears to have the latest BTRFS code in it. I then tried to remove my missing drive again: root@willvo:~# btrfs filesystem show failed to read /dev/sr0 Label: none uuid: f929c413-01c8-443f-b4f2-86f36702f519 Total devices 3 FS bytes used 594.71GB devid 1 size 931.51GB used 604.00GB path /dev/sdb1 devid 2 size 931.51GB used 604.00GB path /dev/sdc1 *** Some devices missing Btrfs v0.19-36-gcbc979b-dirty root@willvo:~# btrfs device delete missing /data root@willvo:~# tail -1 /var/log/syslog Nov 6 13:36:29 willvo kernel: [ 1227.711276] btrfs: no missing devices found to remove root@willvo:~# btrfs filesystem show failed to read /dev/sr0 Label: none uuid: f929c413-01c8-443f-b4f2-86f36702f519 Total devices 3 FS bytes used 594.71GB devid 1 size 931.51GB used 604.00GB path /dev/sdb1 devid 2 size 931.51GB used 604.00GB path /dev/sdc1 *** Some devices missing Btrfs v0.19-36-gcbc979b-dirty This is already strange as 'btrfs device delete' cannot find the missing device that 'btrfs filesystem show' knows about. But then things get really strange... root@willvo:~# btrfs filesystem df /data Data, RAID0: total=1.18TB, used=596.74GB System: total=4.00MB, used=96.00KB Metadata, RAID0: total=2.00GB, used=993.35MB Why is my filesystem suddenly showing RAID0? Note that the used space displayed still seems to suggest raid 1. Unfortunately I didn't notice the raid0 label right away, and did: root@willvo:~# btrfs filesystem balance /data root@willvo:~# btrfs filesystem show failed to read /dev/sr0 Label: none uuid: f929c413-01c8-443f-b4f2-86f36702f519 Total devices 3 FS bytes used 594.71GB devid 1 size 931.51GB used 298.88GB path /dev/sdb1 devid 2 size 931.51GB used 298.88GB path /dev/sdc1 *** Some devices missing Btrfs v0.19-36-gcbc979b-dirty root@willvo:~# btrfs filesystem df /data Data, RAID0: total=596.00GB, used=593.75GB System: total=4.00MB, used=52.00KB Metadata, RAID0: total=1.75GB, used=979.95MB Which seems to have believed the spurious raid0 setting and converted my setup from raid1 to raid0 - albeit still with missing devices. Is there any way to 'convert back' to raid1? My reading suggests that feature isn't implemented yet - although I managed to magically convert from raid1 to raid0, so who knows. Cheers, Will :-} -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
