linux-ext4 - Re: question about ext4 backup block group descriptors

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Date:   Fri, 1 Feb 2019 11:08:52 +0800
From:   Xiaoguang Wang <xiaoguang.wang@...ux.alibaba.com>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: question about ext4 backup block group descriptors

hi,

> On Jan 31, 2019, at 1:07 AM, Xiaoguang Wang <xiaoguang.wang@...ux.alibaba.com> wrote:
>>
>> Anyone can help answer when ext4's backup block group descriptors are updated?
>> I had used blktrace to track the corresponding backup block group descriptor
>> block, but didn't find that any backup blocks were written.
>> Thanks in advance.
> 
> The ext4 kernel code never updates the backup block group descriptors.  That is only
> done by e2fsck.
I see, thanks very much.

Regards,
Xiaoguang Wang

> 
> Cheers, Andreas
> 
> 
> 
> 
>