lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Sun, 23 Jun 2013 18:35:44 -0400
From:	Mark Lord <>
To:	Pavel Machek <>
CC:	Marcus Overhagen <>,
	kernel list <>,,
Subject: Re: SATA hdd refuses to reallocate a sector?

On 13-06-23 05:51 PM, Pavel Machek wrote:
> On Sun 2013-06-23 17:27:52, Mark Lord wrote:
>> For all existing drives out there, that's a 512 byte unit.
> I guessed so. (It would be good to actually document it, as well as
> documenting exactly why it is dangerous. Is it okay to send patches?)

Absolutely.  Please, even!

> Well, I definitely have more than one bad sector, but I did try to
> read exactly the same sector and it failed. See below.
read failed.
write works.
read failed.
write works.
read works.
dd failed.
read works.
read works.
read failed.

Odd.  The drive must be furiously reshuffling sectors or something,
or more likely pushing a piece of dirt around scuffing up more bits.

hdparm generally talks directly to a drive, not through the block
or filesystem layers.  So the block, filesystem, and page-cache stuff
don't know anything about --read-sector and --write-sector.

Mark Lord
Real-Time Remedies Inc.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists