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--- general:linux:btrfs [2022/05/11 15:06] – created sunkan
+++ general:linux:btrfs [2022/05/11 16:33] (current) – sunkan
@@ Line 4: / Line 4: @@
 Use RAID1 and choose stronger checksum XXHASH64
 <code>
-root@lotr:~# mkfs.btrfs -d raid1 -L lotr --checksum xxhash /dev/sda /dev/sdb
+root@lotr:~# mkfs.btrfs -d raid1 -L btrfs_lotr --checksum xxhash /dev/sda /dev/sdb
 </code>
+fstab like so
+<code>
+UUID=<the_uuid> /btrfs_root btrfs defaults,noatime 0       0
+</code>
+Installed btrfsmaintenance package and edited /etc/default/btrfsmaintenance since we are not mounted at /
+<code>
+BTRFS_BALANCE_MOUNTPOINTS="/btrfs_root"
+BTRFS_SCRUB_MOUNTPOINTS="/btrfs_root"
+BTRFS_TRIM_MOUNTPOINTS="/btrfs_root"
+</code>
+Enabled these timers
+<code>
+systemctl enable btrfs-balance.timer
+systemctl enable btrfs-scrub.timer
+</code>
+And refreshed the configuration (unsure if it is needed or a reboot does the same)
+<code>
+systemctl restart btrfsmaintenance-refresh.service
+</code>
+Verified that timers were added to systemd
+<code>
+root@lotr:~# systemctl -t timer list-units 'btrfs*'
+  UNIT                LOAD   ACTIVE SUB     DESCRIPTION
+  btrfs-balance.timer loaded active waiting Balance block groups on a btrfs filesystem
+  btrfs-scrub.timer   loaded active waiting Scrub btrfs filesystem, verify block checksums
+</code>
+Create subvolume for imagelib
+<code>
+btrfs su create /btrfs_root/imagelib
+</code>
+Setup fstab to mount subvolume separate from btrfs_root
+<code>
+UUID=<the_uuid> /imagelib btrfs defaults,noatime,subvol=imagelib 0       0
+</code>