Hello,
I „BCache“ a BTrFS RAID with 4 hard drives.
Normal use seems to work good. I have no problems.
I have the BTrFS RAID mounted through „/dev/bcache3“.
But when I remove a disk (simulating it’s broken), BTrFS doesn’t inform me
about a „missing disk“:
# btrfs fi show
Label: 'RAID' uuid: d0e2e2eb-2df7-454f-8446-5213cec2de3c
Total devices 4 FS bytes used 12.55GiB
devid 1 size 465.76GiB used 6.00GiB path /dev/bcache3
devid 2 size 931.51GiB used 6.00GiB path /dev/bcache1
devid 3 size 596.17GiB used 6.00GiB path /dev/bcache2
devid 4 size 465.76GiB used 6.00GiB path /dev/bcache0
One of these (actually „/dev/bcache3“ or „/dev/sde“) should be broken or
missing.
I can’t make a „btrfs device delete missing“ either. It replies „ERROR: not a
btrfs filesystem:“. It doesn’t matter, if I use „/dev/bcacheX“ or „/dev/sdX“
for that. And if I make a „btrfs device delete missing /mnt/raid“, it replies:
„ERROR: error removing device 'missing': no missing devices found to remove“.
It looks to me, as if BCache hides these informations from BTrFS. Is this
possible? What do you think?
Thanks
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