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

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Message-ID: <a1b70bef-27df-45d0-abbb-2d6b75ef5f4c@huaweicloud.com>
Date: Tue, 3 Feb 2026 16:08:23 +0800
From: Zheng Qixing <zhengqixing@...weicloud.com>
To: Christoph Hellwig <hch@...radead.org>
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,
 Zheng Qixing <zhengqixing@...wei.com>
Subject: Re: [RFC v2 0/5] md/raid1: introduce a new sync action to repair
 badblocks

Hi,

在 2026/2/3 15:31, Christoph Hellwig 写道:
> 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?

The bad_blocks entries record sectors where I/O failed, which
indicates that the device-internal remapping did not succeed
at that time.

`rectify` does not assume a permanently bad or fixed LBA. Its
purpose is to trigger an additional rewrite, giving the underlying
device (e.g. FTL or firmware) another opportunity to perform its
own remapping.