linux-ext4 - Re: Running fsck of huge ext4 partition takes weeks

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Message-Id: <28A25D6A-DA5A-42D2-9BFE-9F6C95B51BE7@dilger.ca>
Date:	Tue, 25 Aug 2015 13:43:46 -0600
From:	Andreas Dilger <adilger@...ger.ca>
To:	Alexander Afonyashin <a.afonyashin@...net-team.ru>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: Running fsck of huge ext4 partition takes weeks

On Aug 25, 2015, at 9:30 AM, Alexander Afonyashin <a.afonyashin@...net-team.ru> wrote:
> 
> Hi,
> 
> Recently I had to run fsck on 47TB ext4 partition backed by hardware
> RAID6 (LSI MegaRAID SAS 2108). Right now over 2 weeks passed but fsck
> is not finished yet. It occupies 30GB RSS, almost 35GB VSS and eats
> 100% of single CPU. It detected errors (and fixed them) but doesn't
> finish yet.
> 
> Rescue disc is based on Debian 7.8.
> kernel: 4.1.4-5
> e2fsprogs: 1.42.5-1.1+deb7u1
> 
> Any suggestions?

Usually the only reason for e2fsck to run so long is because of
duplicate block pass 1b/1c.

Having some of the actual output of e2fsck would allow us to give
some useful advice.

The only thing I can offer is for you to run "strace -p <e2fsck_pid>"
and/or "ltrace -p <e2fsck_pid>" to see what it is doing.

Cheers, Andreas





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