From: Mark Lord <mlord@pobox.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Marcus Overhagen <marcus.overhagen@gmail.com>,
kernel list <linux-kernel@vger.kernel.org>,
linux-ide@vger.kernel.org, tj@kernel.org
Subject: Re: SATA hdd refuses to reallocate a sector?
Date: Sun, 23 Jun 2013 17:27:52 -0400 [thread overview]
Message-ID: <51C76858.4060906@pobox.com> (raw)
In-Reply-To: <20130623190003.GA6714@amd.pavel.ucw.cz>
On 13-06-23 03:00 PM, Pavel Machek wrote:
>
> Thanks for the hint. (Insert rant about hdparm documentation
> explaining that it is bad idea, but not telling me _why_ is it bad
> idea. Can I expect cache consistency issues after that, or is it just
> simple "you are writing to the disk without any checks"? Plus, I guess
> documentation should mention what sector number is. I guess sectors
> are 512bytes for the old drives, but is it 512 or 4096 for new
> drives?)
For ATA, use the "logical sector size".
For all existing drives out there, that's a 512 byte unit.
> ...but it does not do the trick :-(. It behaves strangely as if it was
> still cached somewhere. Do I need to turn off the write back cache?
No, it works just fine. You probably have more than one bad sector.
After you see a read failure, run "smartctl -a" and look at the error
logs to see what sector the drive is choking on.
Or just low-level format it all with "hdparm --security-erase".
Cheers
--
Mark Lord
Real-Time Remedies Inc.
mlord@pobox.com
next prev parent reply other threads:[~2013-06-23 21:41 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-23 10:19 SATA hdd refuses to reallocate a sector? Pavel Machek
2013-06-23 11:21 ` Pavel Machek
2013-06-23 13:16 ` Marcus Overhagen
2013-06-23 19:00 ` Pavel Machek
2013-06-23 21:27 ` Mark Lord [this message]
2013-06-23 21:51 ` Pavel Machek
2013-06-23 22:35 ` Mark Lord
2013-06-24 6:19 ` Marcus Overhagen
2013-06-24 12:28 ` Pavel Machek
2013-06-24 7:14 ` Ondrej Zary
2013-06-24 11:06 ` Pavel Machek
2013-06-24 12:18 ` Mark Lord
2013-06-26 3:04 ` James Bottomley
2013-06-26 6:11 ` Ondrej Zary
2013-06-29 18:47 ` Henrique de Moraes Holschuh
2013-06-29 23:02 ` Mark Lord
2013-06-30 14:34 ` Henrique de Moraes Holschuh
2013-06-30 16:49 ` Pavel Machek
2013-07-01 13:28 ` Henrique de Moraes Holschuh
2015-04-30 19:01 ` Pavel Machek
2013-06-24 12:48 ` Zdenek Kaspar
2013-06-24 13:08 ` Ondrej Zary
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