linux-kernel - Re: Software raid0 will crash the file-system, when each disk is 5TB

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Message-ID: <20070516140452.GC5286@schatzie.adilger.int>
Date:	Wed, 16 May 2007 08:04:52 -0600
From:	Andreas Dilger <adilger@...sterfs.com>
To:	Jeff Zheng <Jeff.Zheng@...ace.com>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: Software raid0 will crash the file-system, when each disk is 5TB

On May 16, 2007  11:09 +1200, Jeff Zheng wrote:
> We are using two 3ware disk array controllers, each of them is connected
> 8 750GB harddrives. And we build a software raid0 on top of that. The
> total capacity is 5.5TB+5.5TB=11TB
> 
> We use jfs as the file-system, we have a test application that write
> data continuously to the disks. After writing 52 10GB files, jfs
> crashed. And we are not able to recover it, fsck doesn't recognise it
> anymore.
> We then tried xfs, same application, lasted a little longer, but gives
> kernel crash later.

Check if your kernel has CONFIG_LBD enabled.

The kernel doesn't check if the block layer can actually write to
a block device > 2TB.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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