zero a drive with progress (change 1T to whatever drive size your zeroing):
# dd if=/dev/zero bs=1M | pv -s 1T | dd bs=1M of=/dev/sde
Erase the drive then read back the blocks to check for errors:
# badblocks -svw -t 0x00 /dev/sde
BTRFS Cheatsheet
Create a RAID 1 style file system across two devices:
mkfs.btrfs -d raid1 -m raid1 /dev/sdl /dev/sdn |
Display information about the filesystem
btrfs fi show /mnt/btrfs btrfs fi df /mnt/btrfs |
Check the data while online:
btrfs scrub start /mnt/btrfs btrfs scrub status /mnt/btrfs |
Add a drive
btrfs device add /dev/sda /mnt/btrfs btrfs balance start -d -m /mnt/btrfs |
Remove a drive
btrfs device delete /dev/sdl /mnt/btrfs |
Replace a drive
btrfs replace start /dev/sda /dev/sdl /mnt/btrfs |
Convert to RAID 1 (both data and metadata)
btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/btrfs btrfs balance status /mnt/btrfs |