I'm struggling to mount an encrypted backing device. The backing
device is a RAID 1 array at /dev/md127 and the cache device is
/dev/sdb1.
# lsblk
NAME MAJ:MIN RM SIZE RO
TYPE MOUNTPOINT
sda 8:0 0 223.6G 0 disk
├─sda1 8:1 0 700M 0 part /boot
├─sda2 8:2 0 700M 0
part /boot/efi
├─sda3 8:3 0 26G 0 part
│ └─luks-9793c78f-723c-4218-865f-83dbc4659192 253:1 0 26G 0 crypt [SWAP]
└─sda4 8:4 0 162G 0 part
└─luks-569b1153-2fab-4984-b1b6-c4a02ee206ef 253:0 0 162G 0 crypt /
sdb 8:16 0 111.8G 0 disk
├─sdb1 8:17 0 40G 0 part
└─sdb2 8:18 0 71.8G 0 part
sdc 8:32 0 1.8T 0 disk
└─sdc1 8:33 0 1.8T 0 part
└─md127 9:127 0 1.8T 0 raid1
sdd 8:48 0 1.8T 0 disk
└─sdd1 8:49 0 1.8T 0 part
└─md127 9:127 0 1.8T 0 raid1
sde 8:64 1 58.9G 0 disk
├─sde1 8:65 1 20G 0 part
└─sde2 8:66 1 38.9G 0 part
sr0 11:0 1 1024M 0 rom
# blkid | grep -E "md127|sdb1"
/dev/sdb1: UUID="535bfa2d-4c6e-4c19-91b2-d292872a1877" TYPE="bcache"
PARTLABEL="Linux filesystem"
PARTUUID="505789f1-0523-4c62-bdb1-81bc0cc7bff1"
/dev/md127: UUID="b17ceaac-27ec-44d8-8bbb-235cfaa0c4a4" TYPE="bcache"
It was working right when I installed Fedora 31 yesterday but then I
resized the caching partition and I can't make it work again.
This is what I tried
# wipefs -a /dev/sdb1
/dev/sdb1: 16 bytes were erased at offset 0x00001018 (bcache): c6 85
73 f6 4e 1a 45 ca 82 65 f5 7f 48 ba 6d 81
# make-bcache -C --writeback /dev/sdb1
UUID: eb7d8e72-f24c-48ee-bad0-771afccca876
Set UUID: 50e33260-4623-4374-9a61-c78b7d75280e
version: 0
nbuckets: 81920
block_size: 1
bucket_size: 1024
nr_in_set: 1
nr_this_dev: 0
first_bucket: 1
# ll /sys/fs/bcache/
total 0
drwxr-xr-x. 7 root root 0 Jan 5 18:34 50e33260-4623-4374-9a61-c78b7d75280e
--w-------. 1 root root 4096 Jan 5 17:39 pendings_cleanup
--w-------. 1 root root 4096 Jan 5 18:03 register
--w-------. 1 root root 4096 Jan 5 17:39 register_quiet
# bcache-super-show /dev/sdb1
sb.magic ok
sb.first_sector 8 [match]
sb.csum C4CB62916B7825CE [match]
sb.version 3 [cache device]
dev.label (empty)
dev.uuid eb7d8e72-f24c-48ee-bad0-771afccca876
dev.sectors_per_block 1
dev.sectors_per_bucket 1024
dev.cache.first_sector 1024
dev.cache.cache_sectors 83885056
dev.cache.total_sectors 83886080
dev.cache.ordered yes
dev.cache.discard no
dev.cache.pos 0
dev.cache.replacement 0 [lru]
cset.uuid 50e33260-4623-4374-9a61-c78b7d75280e
# echo /dev/md127 > /sys/fs/bcache/register
# echo 50e33260-4623-4374-9a61-c78b7d75280e > /sys/block/md127/bcache/attach
# blkid | grep bcache0
/dev/bcache0: UUID="7e2c0b40-8dec-4b13-8d00-b53b55160775" TYPE="crypto_LUKS"
# bcache-status
--- bcache ---
UUID 50e33260-4623-4374-9a61-c78b7d75280e
Block Size 512 B
Bucket Size 512.00 KiB
Congested? False
Read Congestion 2.0ms
Write Congestion 20.0ms
Total Cache Size 40 GiB
Total Cache Used 409.6 MiB (1%)
Total Cache Unused 40 GiB (99%)
Evictable Cache 40 GiB (100%)
Replacement Policy [lru] fifo random
Cache Mode writethrough [writeback] writearound none
Total Hits 9 (64%)
Total Misses 5
Total Bypass Hits 13 (16%)
Total Bypass Misses 64
Total Bypassed 308.00 KiB
# lsblk
NAME MAJ:MIN RM SIZE RO
TYPE MOUNTPOINT
sda 8:0 0 223.6G 0 disk
├─sda1 8:1 0 700M 0 part /boot
├─sda2 8:2 0 700M 0
part /boot/efi
├─sda3 8:3 0 26G 0 part
│ └─luks-9793c78f-723c-4218-865f-83dbc4659192 253:1 0 26G 0 crypt [SWAP]
└─sda4 8:4 0 162G 0 part
└─luks-569b1153-2fab-4984-b1b6-c4a02ee206ef 253:0 0 162G 0 crypt /
sdb 8:16 0 111.8G 0 disk
├─sdb1 8:17 0 40G 0 part
│ └─bcache0 252:0 0 1.8T 0 disk
└─sdb2 8:18 0 71.8G 0 part
sdc 8:32 0 1.8T 0 disk
└─sdc1 8:33 0 1.8T 0 part
└─md127 9:127 0 1.8T 0 raid1
└─bcache0 252:0 0 1.8T 0 disk
sdd 8:48 0 1.8T 0 disk
└─sdd1 8:49 0 1.8T 0 part
└─md127 9:127 0 1.8T 0 raid1
└─bcache0 252:0 0 1.8T 0 disk
sde 8:64 1 58.9G 0 disk
├─sde1 8:65 1 20G 0 part
└─sde2 8:66 1 38.9G 0 part
sr0 11:0 1 1024M 0 rom
# mount /dev/bcache0 /r
mount: /r: unknown filesystem type 'crypto_LUKS'.
# cryptsetup open /dev/bcache0 backing-device
Enter passphrase for /dev/bcache0:
# mount /dev/mapper/backing-device /r
mount: /r: unknown filesystem type 'bcache'.
What am I missing?
Regards, Clodoaldo
