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From: Chris Murphy <lists@colorremedies.com>
Date: Tue, 13 Sep 2016 15:06:55 -0600
Message-ID: <CAJCQCtSckyab3JzmW+82GWCCdmMNnNVauT9bs8da1BTGdm0v_g@mail.gmail.com>
Subject: Re: Filesystem forced to readonly after use
To: Cesar Strauss <cestrauss@gmail.com>
Cc: "Austin S. Hemmelgarn" <ahferroin7@gmail.com>,
        Btrfs BTRFS <linux-btrfs@vger.kernel.org>
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Sender: linux-btrfs-owner@vger.kernel.org
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>>From the fsck...

bad block 160420741120

I can't tell though if that's a bad Btrfs leaf/node where both dup
copies are bad; or if it's a bad sector.

I'd mount it ro, and take a backup of anything you care about before
proceeding further.

smartctl -x might reveal if there are problems the drive itself is aware of.