I ma trying to make a "RAID1" with /dev/sda2 ans /dev/sdb (or similar).
But I have stranges status or errors about "missing devices" and I do
not understand the current situation :
root@server:~# btrfs fi show
Label: none uuid: 28c2b7ab-631c-40a3-bab7-00dac5dd20eb
Total devices 1 FS bytes used 190.91GiB
devid 1 size 1.82TiB used 196.02GiB path /dev/sda2
warning, device 1 is missing
Label: none uuid: 2d45149a-fb97-4c2a-bae2-4cfe4e01a8aa
Total devices 2 FS bytes used 116.18GiB
devid 2 size 1.82TiB used 118.03GiB path /dev/sdb
*** Some devices missing
root@server:~# fdisk -l
Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: CFF97102-D6B5-4126-B2B4-FA735598D1F0
Device Start End Sectors Size Type
/dev/sda1 2048 1050623 1048576 512M EFI System
/dev/sda2 1050624 3907026943 3905976320 1.8T Linux filesystem
Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
root@server:~# btrfs fi usage /
Overall:
Device size: 1.82TiB
Device allocated: 196.02GiB
Device unallocated: 1.63TiB
Device missing: 0.00B
Used: 191.84GiB
Free (estimated): 1.63TiB (min: 835.27GiB)
Data ratio: 1.00
Metadata ratio: 2.00
Global reserve: 263.64MiB (used: 0.00B)
Data,single: Size:192.01GiB, Used:189.98GiB
/dev/sda2 192.01GiB
Metadata,DUP: Size:2.00GiB, Used:951.67MiB
/dev/sda2 4.00GiB
System,DUP: Size:8.00MiB, Used:48.00KiB
/dev/sda2 16.00MiB
Unallocated:
/dev/sda2 1.63TiB
root@server:~#
