Re: RAID1 disk upgrade method

[Sean Greenslade <sean@seangreenslade.com>]

On Sat, Jan 23, 2016 at 05:03:15PM -0700, Chris Murphy wrote:
> Just make sure you have backups before, during, and after all of this,
> which should be the case no matter Btrfs or not. Mixed extent types
> should work fine, but who knows you could get into an edge case at a
> later time for all anyone knows. Looks like skinny extent became
> default in btrfs-progs 3.18.

OK, disks have arrived, and I've completed the first replace.
Interestingly enough, the replace seems to have succeeded, however btrfs
fi show doesn't seem to think so.

Dmesg:
[Wed Jan 27 13:03:09 2016] BTRFS info (device sdb1): disk space caching
is enabled
[Wed Jan 27 13:03:09 2016] BTRFS: has skinny extents
[Wed Jan 27 13:03:09 2016] BTRFS: bdev /dev/sdb1 errs: wr 0, rd 186,
flush 0, corrupt 0, gen 0
[Wed Jan 27 13:05:23 2016]  sdc: sdc1
[Wed Jan 27 13:05:25 2016]  sdc: sdc1
[Wed Jan 27 13:08:37 2016] BTRFS: dev_replace from /dev/sdb1 (devid 2)
to /dev/sdc1 started
[Wed Jan 27 16:34:49 2016] BTRFS: dev_replace from /dev/sdb1 (devid 2)
to /dev/sdc1 finished

Btrfs fi show:
warning, device 3 is missing
warning, device 3 is missing
warning devid 3 not found already
Label: none  uuid: 490b8b7c-59c4-45dc-ac63-6a90f0966776
        Total devices 2 FS bytes used 1.45TiB
		devid    1 size 1.82TiB used 1.52TiB path /dev/sda1
		*** Some devices missing

I haven't rebooted or remounted yet, so I'm curious if this is a bug,
a normal thing that is fixed by a reboot, or what.

Still running the same versions from my original email, but here they
are again:

Linux rat 4.3.3-3-ARCH #1 SMP PREEMPT Wed Jan 20 08:12:23 CET 2016
x86_64 GNU/Linux

btrfs-progs v4.3.1


Thanks,

--Sean