Hello! I have the following disk setup: 1x 3TB WD 2x 2TB WD On each disk I have created a single partition, and this partition is formatted in BTRFS. Then, I have setup a multidevice filesystem: root@pc5:/media# btrfs filesystem show Label: 'WD30EZRX-00M' uuid: 7008c941-a5e1-44b6-9965-de726d22cc21 Total devices 3 FS bytes used 4.07TB devid 2 size 1.82TB used 1.72TB path /dev/sdd1 devid 1 size 2.73TB used 2.63TB path /dev/sdb1 devid 3 size 1.82TB used 0.00 path /dev/sdc1 Btrfs Btrfs v0.19 root@pc5:/media# btrfs filesystem df /media/sdb1/ Data: total=4.17TB, used=4.07TB System, DUP: total=8.00MB, used=472.00KB System: total=4.00MB, used=0.00 Metadata, DUP: total=94.00GB, used=5.30GB Metadata: total=8.00MB, used=0.00 You can see that devid 3 (=/dev/sdc1) is not utilized at all. Question: How can I delete devid 2 (=/dev/sdd1) securely without loosing any data? Please note that all data stored in this multidevice filesystem is located in a subvolume, means no data is stored in root tree. root@pc5:/media# btrfs subvolume list /media/sdb1/ ID 258 top level 5 path @video ID 2760 top level 5 path @musik ID 3995 top level 5 path @bilder ID 3996 top level 5 path @dokumente ID 3997 top level 5 path @software ID 3998 top level 5 path @hardware -- 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
