linux-kernel - Re: Linux kernel - Libata bad block error handling to user mode program

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Message-ID: <4B8FF2C3.1060808@teksavvy.com>
Date:	Thu, 04 Mar 2010 12:49:55 -0500
From:	Mark Lord <kernel@...savvy.com>
To:	foo saa <foosaa@...il.com>
CC:	Greg Freemyer <greg.freemyer@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Jens Axboe <jens.axboe@...cle.com>, linux-mm@...ck.org
Subject: Re: Linux kernel - Libata bad block error handling to user mode 
 program

On 03/04/10 10:33, foo saa wrote:
..
> hdparm is good, but I don't want to use the internal ATA SECURE ERASE
> because I can never get the amount of bad sectors the drive had.
..

Oh.. but isn't that information in the S.M.A.R.T. data ??

You'll not find the bad sectors by writing -- a true WRITE nearly never
reports a media error.  Instead, the drive simply remaps to a good sector
on the fly and returns success.

Generally, only READs report media errors.

Cheers
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