Date: Fri, 4 May 2001 08:40:14 GMT From: Wilko Bulte <wkb@freebie.demon.nl> To: Riccardo.Veraldi@fi.infn.it, Wilko Bulte <wkb@freebie.demon.nl>, Terry Lambert <tlambert@primenet.com>, <Riccardo.Veraldi@fi.infn.it>, <freebsd-alpha@freebsd.org> Subject: Re: vector: 0x670 Message-ID: <E14vb8I-0006Zc-00@post.mail.nl.demon.net>
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> Hi all thanks a lot for yoyur valuable help. > I Think it might be a problem due to over heating. > I removed the dissipator and when I did it hte machine crashed after a few > minutes with the machien check 0x670 error... I will change dissipator Why? I expect this machine to have the standard DEC heatsink? Or has somebody messed with it? > size and will add special glue for disipation between the CPU and Alpha CPUs by default have a Grafoil heat conducting foil between the CPU and the heatsink. It is a small dark gray patch of foil. Is that one missing? Bad idea.. Also, be careful not to over-torque the heatsink mounting nuts! > dissipator and I will add a fan and let you know what is going to happen. > Now hte CPU is so hot that Icannot even try to put my finger over it!! Be careful! You could permanently kill it this way!! Any chance you can make a picture available (borrowing a digital camera or so) of what you have in this machine? Wilko > > Rick > > > On Wed, 2 May > 2001, Wilko Bulte wrote: > > > Date: Wed, 2 May 2001 20:37:06 +0200 > > From: Wilko Bulte <wkb@freebie.demon.nl> > > To: Terry Lambert <tlambert@primenet.com> > > Cc: Riccardo.Veraldi@fi.infn.it, freebsd-alpha@freebsd.org > > Subject: Re: vector: 0x670 > > > > On Wed, May 02, 2001 at 06:27:38PM +0000, Terry Lambert wrote: > > > > 670 Processor Uncorrectable unrecoverable cache or TLB errors, or > > > > read of a non-existent I/O space > > > > > > > > > > > > Do you think it can be an error due to overheating or do I have to throw > > > > my AlphaStation away ?? > > > > > > No quick answers, but some things to try, and some advice and > > > opinions... > > > > > > > > > A cache error means that the processor is bad, if it's L1 cache; > > > this could be the result of overheating. If it's L2 cache, the > > > cause could still be overheating, but I've seen a lot of people > > > trying to use cache chips that were too slow. > > > > I don't recall which AS version this was, but most of the have > > SMD soldered on caches. Some have cache modules, some cache SIMMs. > > In case of cache modules of any shape or form please check if they > > are seated well. > > > > > - If it's overheating, that's usually the result of overclocking, > > > either intentionally, or unintentionally. Make sure you are not > > > doing that. > > > > Easily tested by trying if your fingers get fried when touching the > > heatsink. > > > > > You might also be using memory which is too slow, or has fake > > > parity instead of real parity (don't do that). Slow memory > > > tends to become more of an issue when you stick in a lot of it, > > > since the DMA refresh doesn't get around to each bank in time; > > > this is particularly problematic if you are doing heavy I/O, > > > so that the memory bus is latched for DMA, and refresh is thus > > > delayed really long due to bus hold times; this is usually > > > possible to adjust in the drivers or controller configurations > > > and is often called "bus on" time. > > > > *Very* unlikely. Alpha machines are built to really drive lots > > of memory. Not this whimpy PC stuff that drives only 4 SIMMs/DIMMs > > from a single ASIC. > > > > > - I've occasionally loaded a machine with too much memory for > > > it to reasonably handle refresh, given the memory bus speed > > > and the bus-on time for some PCI controllers (I had an Adaptec > > > that was a bus hog; when I loaded the disk subsystem with the > > > extra amount of RAM, the refresh failed, and the system lost > > > its mind). > > > > Again, unlikely. > > > > > A TLB error means that the contents of a Translation Lookaside > > > Buffer are incorrect. This could be a kernel bug. > > > > Or the CPU is dead/dying. Seen that before.. > > > > -- > > | / o / / _ Arnhem, The Netherlands email: wilko@freebsd.org > > |/|/ / / /( (_) Bulte Powered by FreeBSD/alpha http://www.freebsd.org > > > -- | / o / / _ Arnhem, The Netherlands email: wilko@freebsd.org |/|/ / / /( (_) Bulte http://www.freebsd.org http://www.nlfug.nl To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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