From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Zick" Subject: Re: [parisc-linux] Machine hanging during high-traffic NFS Date: Tue, 19 Jul 2005 18:36:15 -0500 Message-ID: <200507191836.15414.mszick@morethan.org> References: <42DD6A7F.8090706@excelcia.org> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-2022-jp" To: parisc-linux@lists.parisc-linux.org Return-Path: In-Reply-To: <42DD6A7F.8090706@excelcia.org> List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: parisc-linux-bounces@lists.parisc-linux.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 > > _______________________________________________ parisc-linux mailing list parisc-linux@lists.parisc-linux.org http://lists.parisc-linux.org/mailman/listinfo/parisc-linux