Hi,
btrfs is going to get support for 3- and 4-copy RAID1,
https://lore.kernel.org/linux-btrfs/cover.1572534591.git.dste...@suse.com/
This patch adds the support. The code changes are minimal, it's
essentially only extension of what RAID1 does.
I haven't tested it though, the docs don't see to cover filesystem
support testing. What I tried:
* make btrfs_test
* ./btrfs_test
It did not find any compressible file from the candidate list, I wonder
why a dummy zero-filled file cannot be created instead.
Then running it seems to create only the default profile of the images
(mkfs prints only single/dup for data and metadata), the following
message seems to repeat without any real progress:
--
Label: grub_;/testé莭莽😁киритi
urewfceniuewruevrewnuuireurevueurnievrewfnerfcnevirivinrewvnirewnivrewiuvcrewvnuewvrrrewniuerwreiuviurewiuviurewnuvewnvrenurnunuvrevuurerejiremvreijnvcreivire
nverivnreivrevnureiorfnfrvoeoiroireoireoifrefoieroifoireoi
UUID: f6d3e26c-4d6c-407d-b981-7aa6d842578a
Node size: 16384
Sector size: 4096
Filesystem size: 5.66GiB
Block group profiles:
Data: single 8.00MiB
Metadata: DUP 256.00MiB
System: DUP 8.00MiB
SSD detected: no
Incompat features: extref, skinny-metadata
Number of devices: 1
Devices:
ID SIZE PATH
1 5.66GiB /dev/loop0
Device proc: Filesystem type procfs - Sector size 512B - Total size 0KiB
Device loop0: Filesystem type btrfs - Label `grub_;/testé莭莽😁киритi
urewfceniuewruevrewnuuireurevueurnievrewfnerfcnevirivinrewvnirewnivrewiuvcrewvnuewvrrrewniuerwreiuviurewiuviurewnuvewnvrenurnunuvrevuurerejiremvreijnvcreivire
nverivnreivrevnureiorfnfrvoeoiroireoireoifrefoieroifoireoi', UUID
f6d3e26c-4d6c-407d-b981-7aa6d842578a - Sector size 512B - Total size 5939200KiB
Device host: Filesystem type hostfs - Sector size 512B - Total size 0KiB
umount: /tmp/tmp.1I3JDrkI64/btrfs_zstd_rw: not mounted.
--
There must be something I'm missing, please advise. Thanks.
David Sterba (1):
btrfs: add support for new raid1c34 profiles
grub-core/fs/btrfs.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--
2.23.0
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