On 31/07/2019 22.05, Adam Mizerski wrote:
According to wiki page, that you linked: "The level support of ZLIB has been added in v4.14"
Leap 15.0 (and 15.1) is using kernel 4.12.
So for now you can only specify compression algorithm, without level.
Isengard:~ # mount -v /mnt/BookTelcontar/ mount: /mnt/BookTelcontar: wrong fs type, bad option, bad superblock on /dev/mapper/cr_my_book_tlcntr, missing codepage or helper program, or other error. Isengard:~ # grep BookTelcontar /etc/fstab /dev/mapper/cr_my_book_tlcntr /mnt/BookTelcontar btrfs lazytime,compress=zstd 1 3 Isengard:~ # Isengard:~ # mount -v /mnt/BookTelcontar/ mount: /mnt/BookTelcontar: wrong fs type, bad option, bad superblock on /dev/mapper/cr_my_book_tlcntr, missing codepage or helper program, or other error. Isengard:~ # grep BookTelcontar /etc/fstab /dev/mapper/cr_my_book_tlcntr /mnt/BookTelcontar btrfs lazytime,compress:zstd 1 3 Isengard:~ # Isengard:~ # mount -v /mnt/BookTelcontar/ mount: /dev/mapper/cr_my_book_tlcntr mounted on /mnt/BookTelcontar. Isengard:~ # grep BookTelcontar /etc/fstab /dev/mapper/cr_my_book_tlcntr /mnt/BookTelcontar btrfs lazytime,compress=zlib 1 3 Isengard:~ # Isengard:~ # umount /mnt/BookTelcontar Isengard:~ # mount -v /mnt/BookTelcontar/ mount: /mnt/BookTelcontar: wrong fs type, bad option, bad superblock on /dev/mapper/cr_my_book_tlcntr, missing codepage or helper program, or other error. Isengard:~ # grep BookTelcontar /etc/fstab /dev/mapper/cr_my_book_tlcntr /mnt/BookTelcontar btrfs lazytime,compress=zlib:2 1 3 Isengard:~ # Isengard:~ # mount -v /mnt/BookTelcontar/ mount: /dev/mapper/cr_my_book_tlcntr mounted on /mnt/BookTelcontar. Isengard:~ # grep BookTelcontar /etc/fstab /dev/mapper/cr_my_book_tlcntr /mnt/BookTelcontar btrfs lazytime,compress 1 3 Isengard:~ # mount -v | grep BookTelcontar /dev/mapper/cr_my_book_tlcntr on /mnt/BookTelcontar type btrfs (rw,relatime,lazytime,compress=zlib,space_cache,subvolid=5,subvol=/) Isengard:~ # It appears that only zlib is supported. -- Cheers / Saludos, Carlos E. R. (from 15.0 x86_64 at Telcontar)