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From: "Michael S. Zick" <mszick@morethan.org>
To: parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Machine hanging during high-traffic NFS
Date: Tue, 19 Jul 2005 18:36:15 -0500	[thread overview]
Message-ID: <200507191836.15414.mszick@morethan.org> (raw)
In-Reply-To: <42DD6A7F.8090706@excelcia.org>

On Tue July 19 2005 16:02, Kurt Fitzner wrote:
> I've been using nfs to try and save backup images from my B132L
> (2.6.12-pa2) with a simple:
>   dd if=/dev/sda of=/mnt/bulk/sda-image bs=512
> 
> Every time the machine hangs solid - the heartbeat LED even stops.
> Usually it hangs after around 1 to 2 gigs have been transferred.  There
> are no log entries at the time of the hang.  IT just... stops.
> 
> I'm using a 3c905 PCI ethernet card rather than the stock 10 megabit
> LASI on board.
> 
> I'm wondering if this might be an issue with the ethernet driver when
> compiled for PARISC.  I've tried very large ftp transfers and can't
> reproduce the problem that way.
> 
> I've also tried NFS over TCP and  tried reducing the rsize/wsize below
> 1500 bytes to prevent IP fragmentation.  Neither of which seem to help.
> 
> Are there any known NFS issues right now?  Any ideas?  Suggestions?
> 
Questions/Suggestions only.

Any hints in the log of the receiving (nfs server) side?

Any portion of /dev/sda mounted somewhere?

Is the /mnt/bulk/sda-image mount point on /dev/sda* ?
That is, is there a drive in common with '/', '/mnt', '/dev'
and the entire device '/dev/sda' ?

Can you achive your goal with a file copy rather than
a disk image?  Have you tried running rsync?

Can you successfully transfer (dd) a single file larger than
your trouble point size when trying to transfer the entire device?

Have you tried a blocksize != 512 with the dd command?
Perhaps an even sub-multiple of the packet size so that the
network stack does not have to fragment the dd blocks.

Mike
> 	Kurt.
> _______________________________________________
> parisc-linux mailing list
> parisc-linux@lists.parisc-linux.org
> http://lists.parisc-linux.org/mailman/listinfo/parisc-linux
> 
> 
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  reply	other threads:[~2005-07-19 23:36 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-07-19 21:02 [parisc-linux] Machine hanging during high-traffic NFS Kurt Fitzner
2005-07-19 23:36 ` Michael S. Zick [this message]
2005-07-20  1:04 ` Kyle McMartin
2005-07-20  3:31   ` John David Anglin
2005-07-20  2:57     ` Thibaut VARENE
2005-07-20 14:56       ` Matthew Wilcox
2005-07-20  6:59   ` Kurt Fitzner
2005-07-20 16:40     ` Grant Grundler
2005-07-21  7:42       ` Kurt Fitzner
2005-07-21 12:36         ` Grant Grundler
2005-07-21 23:28           ` John David Anglin
2005-07-22  0:29             ` Kurt Fitzner
2005-07-22  3:55               ` Grant Grundler
2005-07-21 16:04         ` Kyle McMartin

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