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

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Message-ID: <aYIirWALBGrMxmbw@infradead.org>
Date: Tue, 3 Feb 2026 08:30:37 -0800
From: Christoph Hellwig <hch@...radead.org>
To: Pascal Hambourg <pascal@...uf.fr.eu.org>
Cc: Christoph Hellwig <hch@...radead.org>,
	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 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.