linux-kernel - Re: [RFC v2 0/5] md/raid1: introduce a new sync action to repair badblocks

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Message-ID: <9eba8de0-c3b5-47a8-8729-205e0000fc23@plouf.fr.eu.org>
Date: Tue, 3 Feb 2026 21:36:38 +0100
From: Pascal Hambourg <pascal@...uf.fr.eu.org>
To: Christoph Hellwig <hch@...radead.org>
Cc: Zheng Qixing <zhengqixing@...weicloud.com>, song@...nel.org,
 yukuai@...as.com, linan122@...wei.com, xni@...hat.com,
 linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
 yi.zhang@...wei.com, yangerkun@...wei.com, houtao1@...wei.com,
 zhengqixing@...wei.com
Subject: Re: [RFC v2 0/5] md/raid1: introduce a new sync action to repair
 badblocks

On 03/02/2026 at 17:30, Christoph Hellwig wrote:
> On Tue, Feb 03, 2026 at 09:08:18AM +0100, Pascal Hambourg wrote:
>> On 03/02/2026 à 08:31, Christoph Hellwig wrote:
>>> Just curious, but what kind of devices do you see that have
>>> permanent bad blocks at a fixed location that are not fixed by
>>> rewriting the sector?
>>
>> I have seen this with several hard disk drives of various brands, even
>> though SMART attribute #5 (reallocated sector count) had not reached the
>> limit.
> 
> Weird.  Can you share the models?  I'm especially curious if these
> are consumer of enterprise drives and of what vintage.

I did not keep track of the models and do not remember them, it was a 
long time ago. They were mostly hard disk drives from Dell and HP 
professional desktop and laptop series, so consumer grade I guess, 
manufactured around 2010.