mirror of
https://github.com/chubin/cheat.sheets
synced 2024-11-03 15:40:17 +00:00
56 lines
1.4 KiB
Plaintext
56 lines
1.4 KiB
Plaintext
# Create a btrfs file system on /dev/sdb, /dev/sdc, and /dev/sdd
|
|
mkfs.btrfs /dev/sdb /dev/sdc /dev/sdd
|
|
|
|
# btrfs with just one hard drive, metadata not redundant
|
|
# (this is danegerous: if your metadata is lost, your data is lost as well)
|
|
mkfs.btrfs -m single /dev/sdb
|
|
|
|
# data to be redundant and metadata to be non-redundant:
|
|
mkfs.btrfs -m raid0 -d raid1 /dev/sdb /dev/sdc /dev/sdd
|
|
|
|
# both data and metadata to be redundan
|
|
mkfs.btrfs -d raid1 /dev/sdb /dev/sdc /dev/sdd
|
|
|
|
# To get a list of all btrfs file systems
|
|
btrfs filesystem show
|
|
|
|
# detailed df for a fileesystem (mounted in /mnt)
|
|
btrfs filesystem df /mnt
|
|
|
|
# resize btrfs online (-2g decreases, +2g increases)
|
|
btrfs filesystem resize -2g /mnt
|
|
|
|
# use maximum space
|
|
btrfs filesystem resize max /mnt
|
|
|
|
# add new device to a filesystem
|
|
btrfs device add /dev/sdf /mnt
|
|
|
|
# remove devices from a filesystem
|
|
btrfs device delete missing /mnt
|
|
|
|
# create the subvolume /mnt/sv1 in the /mnt volume
|
|
btrfs subvolume create /mnt/sv1
|
|
|
|
# list subvolumes
|
|
btrfs subvolume list /mnt
|
|
|
|
# mount subvolume without mounting the main filesystem
|
|
mount -o subvol=sv1 /dev/sdb /mnt
|
|
|
|
# delete subvolume
|
|
btrfs subvolume delete /mnt/sv1
|
|
|
|
# taking snapshot of a subvolume
|
|
btrfs subvolume snapshot /mnt/sv1 /mnt/sv1_snapshot
|
|
|
|
# taking snapshot of a file (copy file by reference)
|
|
cp --reflink /mnt/sv1/test1 /mnt/sv1/test3
|
|
|
|
# convert ext3/ext4 to btrfs
|
|
btrfs-convert /dev/sdb1
|
|
|
|
# convert btrfs to ext3/ext4
|
|
btrfs-convert -r /dev/sdb1
|
|
|