Hello,
I have a raid10 with one device missing. I would like to use btrfs replace to
replace it. However, I am unsure on how to obtain the devid of the missing
device. Having the filesystem mounted in degraded mode under mnt, btrfs fs
show /mnt returns
sudo btrfs filesystem show /mnt
Label: 'dataPool' uuid: b5f082e2-2ce0-4f91-b54b-c2d26185a635
Total devices 4 FS bytes used 665.88GiB
devid 2 size 931.51GiB used 336.03GiB path /dev/sdb
devid 4 size 931.51GiB used 336.03GiB path /dev/sdd
devid 5 size 931.51GiB used 336.03GiB path /dev/sde
*** Some devices missing
but does not mention the devid of the missing device. The device stat is
sudo btrfs device stats /mnt
[/dev/sdb].write_io_errs 0
[/dev/sdb].read_io_errs 0
[/dev/sdb].flush_io_errs 0
[/dev/sdb].corruption_errs 0
[/dev/sdb].generation_errs 0
[(null)].write_io_errs 1448
[(null)].read_io_errs 0
[(null)].flush_io_errs 0
[(null)].corruption_errs 0
[(null)].generation_errs 0
[/dev/sdd].write_io_errs 0
[/dev/sdd].read_io_errs 0
[/dev/sdd].flush_io_errs 0
[/dev/sdd].corruption_errs 0
[/dev/sdd].generation_errs 0
[/dev/sde].write_io_errs 0
[/dev/sde].read_io_errs 0
[/dev/sde].flush_io_errs 0
[/dev/sde].corruption_errs 0
[/dev/sde].generation_errs 0
Btw, the file system is too old for skinny metadata and extended inode refs.
If I do a btrfs replace or a btrfs device add, must I myself ensure that the
new features are not enables for the new device which is to be added?
Thank!
Wolfgang
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