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Re: server crashing

To: Artur Makówka <juice@xxxxxxxxxxxxx>
Subject: Re: server crashing
From: David Chinner <dgc@xxxxxxx>
Date: Mon, 10 Apr 2006 11:59:16 +1000
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <443627B1.5090100@ursynow.2a.pl>
References: <443627B1.5090100@ursynow.2a.pl>
Sender: linux-xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.4.2.1i
On Fri, Apr 07, 2006 at 10:49:53AM +0200, Artur Makówka wrote:
> Hello, i have heavy-traffic server that is crashing every few days. When 
> it crashes i cannot login through ssh and no services are working. One 
> time it 'crashed' when i was logged in though (i had luck), and i saw 
> 'Input/Output Error' when  this happened as i tried to run any command 
> (like ps, ls or anything)

It's not crashing, a filesystem has shut down....

> it is RAID 0 array made from two sata drives.

Any I/O errors in the logs? i.e. is it a SATA issue and XFS is
shutting down to protect itself?

> my xfs system is mounted like this:
> 
> /dev/md0 on / type xfs (rw,noatime)

Well, that explains why you can't log in - your root filesystem has
shutdown. You need to separate your root filesystem from the data
filesystem so that when the data filesystem has a problem it doesn't
take the entire machine down (as you are currently experiencing).

> thanks in advance and please let me know if you need any more info

If there are no I/O errors being reported before the filesystem shuts down,
can you provide more information of the type of I/O the system is executing
when the shutdown occurs?

Cheers,

Dave.
-- 
Dave Chinner
R&D Software Enginner
SGI Australian Software Group


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