Why cachyos defaults to systemd-boot and btrfs at the same time?

FAQ and Tutorials
23

I did a bit more testing of raid1 on root - with systemd-boot.

  • zfs turned out to be a simpler choice than raid1 on btrfs

  • btrfs filesystem show / was not very clear if data was properly mirrored

  • I just partitioned the 2 disks & chose vda as the install disk with the option to “Erase Disk” & the installer just re-used the existing 2 partitions

Disk /dev/vda: 20 GiB, 21474836480 bytes, 41943040 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: D84656E3-B34B-46F0-AF43-B90189118F24

Device       Start      End  Sectors Size Type
/dev/vda1     4096  4198399  4194304   2G EFI System
/dev/vda2  4198400 41942973 37744574  18G Linux filesystem


Disk /dev/vdb: 20 GiB, 21474836480 bytes, 41943040 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: 0E924AAF-CEDE-4CCD-A52D-BA16D278D7C7

Device       Start      End  Sectors Size Type
/dev/vdb1     2048  4196351  4194304   2G EFI System
/dev/vdb2  4196352 41940991 37744640  18G Linux filesystem
  • Calamares successfully installed systemd-boot with zfs
  • adding DISK 2 of the root mirror:
-----------------------------------------
zpool attach <pool> <device> <new device>
-----------------------------------------
zpool attach -f zpcachyos 9b830ba0-9be4-422c-aab3-ef155c8006e9 \
                virtio-pci-0000:08:00.0-part2

# possibly wait one minute for resilvering: os => mirror B to finish
#--------------------------------------------------------------------

❯ zpool status
  pool: zpcachyos
 state: ONLINE
  scan: resilvered 4.85G in 00:01:39 with 0 errors on Wed Oct 23 21:09:52 2024
config:

	NAME                                      STATE     READ WRITE CKSUM
	zpcachyos                                 ONLINE       0     0     0
	  mirror-0                                ONLINE       0     0     0
	    9b830ba0-9be4-422c-aab3-ef155c8006e9  ONLINE       0     0     0
	    virtio-pci-0000:08:00.0-part2         ONLINE       0     0     0

errors: No known data errors

❯ bootctl is-installed
yes