1f5094bb5c
Add support for 3- and 4- copy variants of RAID1. This adds resiliency
against 2 or resp. 3 devices lost or damaged.
$ ./mkfs.btrfs -m raid1c4 -d raid1c3 /dev/sd[abcd]
Label: (null)
UUID: f1f988ab-6750-4bc2-957b-98a4ebe98631
Node size: 16384
Sector size: 4096
Filesystem size: 8.00GiB
Block group profiles:
Data: RAID1C3 273.06MiB
Metadata: RAID1C4 204.75MiB
System: RAID1C4 8.00MiB
SSD detected: no
Incompat features: extref, skinny-metadata, raid1c34
Number of devices: 4
Devices:
ID SIZE PATH
1 2.00GiB /dev/sda
2 2.00GiB /dev/sdb
3 2.00GiB /dev/sdc
4 2.00GiB /dev/sdd
Signed-off-by: David Sterba <dsterba@suse.com>
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| .. | ||
| box.h | ||
| device-scan.c | ||
| device-scan.h | ||
| device-utils.c | ||
| device-utils.h | ||
| format-output.c | ||
| format-output.h | ||
| fsfeatures.c | ||
| fsfeatures.h | ||
| help.c | ||
| help.h | ||
| internal.h | ||
| messages.c | ||
| messages.h | ||
| path-utils.c | ||
| path-utils.h | ||
| rbtree-utils.c | ||
| rbtree-utils.h | ||
| string-table.c | ||
| string-table.h | ||
| task-utils.c | ||
| task-utils.h | ||
| utils.c | ||
| utils.h | ||