Date: Tue, 3 Aug 2004 03:51:44 +0200 From: "Daniel Eriksson" <daniel_k_eriksson@telia.com> To: "'Scott Long'" <scottl@freebsd.org> Cc: 'freebsd current' <current@freebsd.org> Subject: RE: Panic in today's current, UFS problem? Message-ID: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA0VcX9IoJqUaXPS8MjT1PdsKAAAAQAAAAWq8251TAokWWTJuIdaScLgEAAAAA@telia.com> In-Reply-To: <410EEAC8.8010900@freebsd.org>
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Scott Long wrote: >> What I did: >> 1. fdisk/label two 250GB discs hooked up to the on-board SATA=20 >> controller (using sysinstall) 2. copy ~20GB of data to both discs > > Is this step necessary in order to produce the panic? I have no idea. >> 3. successfully run the stress-test mentioned in Ville-Pertti=20 >> Keinonen's mail (above) > > Is this step necessary also? Again, no idea. >> 4. unmount both discs >> 5. run "atacontrol create RAID0 128 ad20 ad22" (the two SATA discs) = 6.=20 >> fdisk/label the striped array (using sysinstall, forcing it to UFS1)=20 >> 7. mount the new partition, and create three empty dirs 8. *boom* >>=20 > > How reproducable is this, and does it always panic in the same spot?=20 > There is definitely some sort of buffer corruption going on, and = either=20 > it's happening in the buffer/cache layer or it's a bad DMA from the = drive. Considering how much problems I've had with this machine lately I would = not at all be suprised if the error is somewhere else. The machine is unfortunately a production machine, and trying to reproduce panics (with = the risks associated with that, such as corrupted user data) is not really = an option. What I've done now is restart the server and run a newfs on the ataraid array of the two SATA discs. I'm in the process of copying 400+GB of = data onto that array, and will run some more stress-tests to verify its stability. So far (200GB into the copy-operation) everything looks good. /Daniel Eriksson
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