From: "Theodore Ts'o" <tytso@mit.edu>
To: Pavel Machek <pavel@ucw.cz>
Cc: kernel list <linux-kernel@vger.kernel.org>
Subject: Re: ext4: total breakdown on USB hdd, 3.0 kernel
Date: Thu, 26 Jun 2014 22:46:59 -0400 [thread overview]
Message-ID: <20140627024659.GF6826@thunk.org> (raw)
In-Reply-To: <20140626203052.GA9449@xo-6d-61-c0.localdomain>
On Thu, Jun 26, 2014 at 10:30:52PM +0200, Pavel Machek wrote:
>
> It looks like the filesystem contains _way_ too many 0xffff's:
That sounds like it's a hardware issue. It may be that the controller
did something insane while trying to do a write at the point when the
disk drive was disconnected (and so the drive suffered a power drop).
> I saved beggining of the filesystem using cat /dev/sdc4 | gzip -9 - > /dev/sda3, but
> then ran out of patience. So there may be something for analysis, but...
The way to snapshot just the metadata blocks for analysis is:
e2image -r /dev/hdc4 | bzip2 > ~/hdc4.e2i.bz2
But in this case, it's I doubt it will be very helpful, because
fundamentally, this appears to be a hardware issue.
- Ted
next prev parent reply other threads:[~2014-06-27 2:47 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-26 20:20 Pavel Machek
2014-06-26 20:30 ` Pavel Machek
2014-06-26 20:50 ` Pavel Machek
2014-06-27 2:48 ` Theodore Ts'o
2014-06-27 2:46 ` Theodore Ts'o [this message]
2014-06-29 20:25 ` Pavel Machek
2014-06-29 21:04 ` Theodore Ts'o
2014-06-30 6:46 ` Pavel Machek
2014-06-30 13:43 ` Theodore Ts'o
2014-07-04 10:23 ` ext4: media error but where? Pavel Machek
2014-07-04 12:11 ` Theodore Ts'o
2014-07-04 17:21 ` Pavel Machek
2014-07-04 18:06 ` Pavel Machek
2014-07-04 18:56 ` Theodore Ts'o
2014-07-06 13:32 ` Pavel Machek
2014-07-06 13:43 ` Pavel Machek
2014-07-06 18:29 ` Theodore Ts'o
2014-07-06 21:37 ` Pavel Machek
2014-07-07 1:00 ` Theodore Ts'o
2014-07-07 18:55 ` Pavel Machek
2014-07-07 23:18 ` 3.16-rc, ext4: oopses, OOMs after hard powerdown Pavel Machek
2014-07-07 23:21 ` ext4: media error but where? Theodore Ts'o
2014-06-27 8:23 ` ext4: total breakdown on USB hdd, 3.0 kernel Oliver Neukum
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