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From: Kai Hendry <hendry@iki.fi>
To: "Austin S. Hemmelgarn" <ahferroin7@gmail.com>,
        Chris Murphy <lists@colorremedies.com>
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Date: Sat, 28 Oct 2017 15:03:15 +0800
In-Reply-To: <1507858974.1236555.1137202920.267B449B@webmail.messagingengine.com>
Subject: Re: USB upgrade fun
Sender: linux-btrfs-owner@vger.kernel.org
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On Fri, 13 Oct 2017, at 09:42 AM, Kai Hendry wrote:
> It probably is... since when I remove my new 4TB USB disk from the
> front, I am at least able to mount my two 2x2TB in degraded mode and see
> my data!

Just a follow up. I have not been of late been able to mount my data,
even in degraded mode.

However someone on #btrfs suggested I try an older Linux kernel & I also
found https://www.spinics.net/lists/linux-btrfs/msg69905.html to
reaffirm my suspicions.

Low and behold I can mount with an older kernel
(linux-4.4.3-1-x86_64.pkg.tar.xz) !! But if I reboot into 4.13.9-1-ARCH,
no worky:

[  489.139903] BTRFS warning (device sdb1): devid 3 uuid
e5f03f81-35e7-4a29-9608-bd78864cc0ad is missing
[  489.524334] BTRFS info (device sdb1): bdev (null) errs: wr 0, rd 1,
flush 0, corrupt 0, gen 0
[  489.524367] BTRFS info (device sdb1): bdev /dev/sdb1 errs: wr 13361,
rd 31990017, flush 155, corrupt 0, gen 0
[  502.934069] BTRFS warning (device sdb1): missing devices (1) exceeds
the limit (0), writeable mount is not allowed
[  502.980748] BTRFS error (device sdb1): open_ctree failed


Does anyone know how I can track the progress of "--fix-dev-size"? It
doesn't seem part of btrfs-progs 4.13-1...