Just a note_ btrfs fi show reads from the disks which could read the cache, you may try drop the cache or, use btrfs-progs from David latest integration to see kernel perspective. Martin <m_btrfs@xxxxxxxxx> wrote: >Trying: > >btrfs device delete missing / > >appears not to do anything for a "/" mount for where I have swapped out >a HDD: > > ># btrfs filesystem show >Label: 'test_btrfs_misc_5' uuid: 7d29d4e6-efdc-41dc-9aa8-e74dfbe13cc9 > Total devices 2 FS bytes used 28.00KB > devid 1 size 59.74GB used 2.03GB path /dev/sdd5 > *** Some devices missing > >Label: 'test_btrfs_root_4' uuid: 269e142c-e561-4227-b2b0-fe2f9fb99391 > Total devices 3 FS bytes used 10.55GB > devid 4 size 56.00GB used 12.03GB path /dev/sde4 > devid 1 size 56.00GB used 12.05GB path /dev/sdd4 > *** Some devices missing > >Btrfs v0.20-rc1-358-g194aa4a ># btrfs device delete missing / ># btrfs filesystem show >Label: 'test_btrfs_misc_5' uuid: 7d29d4e6-efdc-41dc-9aa8-e74dfbe13cc9 > Total devices 2 FS bytes used 28.00KB > devid 1 size 59.74GB used 2.03GB path /dev/sdd5 > *** Some devices missing > >Label: 'test_btrfs_root_4' uuid: 269e142c-e561-4227-b2b0-fe2f9fb99391 > Total devices 3 FS bytes used 10.55GB > devid 4 size 56.00GB used 12.03GB path /dev/sde4 > devid 1 size 56.00GB used 12.05GB path /dev/sdd4 > *** Some devices missing > >Btrfs v0.20-rc1-358-g194aa4a > > >All on the latest "Linux 3.11.5-gentoo". > ># df -h | egrep '/$' >rootfs 112G 22G 89G 20% / >/dev/sdd4 112G 22G 89G 20% / > > > >Aside: Adding the /dev/sde4 device caused no balance action until I >deleted a device to reduce the raid1 mirror (data and metadata) down to >the two devices. > >The "missing" device was an old HDD that had physically failed. No data >was lost for that example failure. > > >Hope of interest, >Martin > > >-- >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 ��.n��������+%������w��{.n�����{����n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�
