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

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Message-ID: <40f37494-cf9c-4bc3-aa38-75c76b5d988e@plouf.fr.eu.org>
Date: Tue, 3 Feb 2026 09:08:18 +0100
From: Pascal Hambourg <pascal@...uf.fr.eu.org>
To: Christoph Hellwig <hch@...radead.org>,
 Zheng Qixing <zhengqixing@...weicloud.com>
Cc: 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 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.