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goobu · Dec 14, 2004, 08:01 PM

I have had my powermac 2.5 since saturday and I have beeen forced to reboot 4 times and earlier tonight it was "kernel panic"

Here is the panic log entry
Tue Dec 14 20:30:40 2004

panic(cpu 0): getnewvnode: vp @ 0x4d558f8 has non-null scmap.

Latest stack backtrace for cpu 0:
Backtrace:
0x000836E4 0x00083BC8 0x0001EDA4 0x000C05E8 0x001D5410 0x001D5040 0x001DB204 0x001DB8F8
0x000BE344 0x000BDD8C 0x000C7698 0x002463C4 0x00094200 0xFFAB9279
Proceeding back via exception chain:
Exception state (sv=0x358C5780)
PC=0x9002A0CC; MSR=0x0200F030; DAR=0x001325A4; DSISR=0x0A000000; LR=0x90A4A624; R1=0xBFFFDD30; XCP=0x00000030 (0xC00 - System call)

Kernel version:
Darwin Kernel Version 7.6.0:
Sun Oct 10 12:05:27 PDT 2004; root:xnu/xnu-517.9.4.obj~1/RELEASE_PPC

Aftermarket components
I have 2 x 1 GB memory chip from cricial
I have an AlchemyTV DVR card connected to my DirectTV box

I have a GeForce 6800 Ultra running my 30" Cinema Display

I am coming from a PC, so rebooting is normal for me, but I am told by a MAC friend that this is a big deal.

Any thoughts?

Maflynn · Dec 14, 2004, 09:17 PM

Well it is unusual, did you try taking out the crucial memory and see if it still gives you KPs?

OreoCookie · Dec 15, 2004, 05:45 AM

Try to run memtest on the machine for more than 24 hours and see if anything comes up.

goobu · Dec 15, 2004, 10:34 AM

KPs? If this is Kernel Panics, I used the machine for 2-3 hours after the first panic without a problem. So my thought was if it happened again, I would remove the AlchemyTV DVR PCI card. If it happened again I would would remove the memory chips and put the PCI card back in. If it happened again I would remove both. After that I am not sure what I would do.

How does one run a memory test for 24 hours?

Forgive me, I am a newbie to macs

Weezer · Dec 15, 2004, 10:52 AM

Originally posted by goobu:
KPs? If this is Kernel Panics, I used the machine for 2-3 hours after the first panic without a problem. So my thought was if it happened again, I would remove the AlchemyTV DVR PCI card. If it happened again I would would remove the memory chips and put the PCI card back in. If it happened again I would remove both. After that I am not sure what I would do.

How does one run a memory test for 24 hours?

Forgive me, I am a newbie to macs

my brothers dual 2.5 came with a free alchemyTV DVR card, and it would consistently KP the machine, so he gave it to me

OreoCookie · Dec 15, 2004, 10:55 AM

memtest is a Unix command line tool available for many platforms. If don't know how to use a command line (or have a friend who can), I'd advise against it and instead swap RAM with modules that you're sure work fine.

If you know a bit about the command line, I can walk you through all the steps (quite easy).

Maflynn · Dec 15, 2004, 12:02 PM

Originally posted by OreoCookie:
memtest is a Unix command line tool available for many platforms.

Wouldn't running the Apple Hardware Test cd be easier and more comprehensive?

Mike

goobu · Dec 15, 2004, 12:20 PM

I have used unix before and from what I am told it should be the same, although I am not sure how to access it from the mac.

If you send me the steps I need, I am sure I can handle it.

THanks,

Leonard · Dec 15, 2004, 12:46 PM

If you need to know just how to get to the command line, all you have to do is go to the Applications folder and run the Terminal app. It will start a unix command line session.

ThisGuy · Dec 15, 2004, 02:04 PM

I have a dual 2.0 rev. b and I got panics like crazy for a while. Do you have any problems booting from the install DVD? If you get panics while booting from the install DVD it is most likely one of the processors.

goobu · Dec 15, 2004, 10:18 PM

I ran the hardware ccheck program and all came back ok

Weezer · Dec 15, 2004, 11:20 PM

Originally posted by goobu:
I ran the hardware ccheck program and all came back ok

like I said before, try the alchemy card

OreoCookie · Dec 16, 2004, 03:58 AM

Originally posted by Maflynn:
Wouldn't running the Apple Hardware Test cd be easier and more comprehensive?

Mike

Because some memory errors pop up just after hours of testing. When one of the physics professors I used to work with got a new cluster, first thing they did was run memtest for several days on each of the nodes. One of 20 was faulty and the memory had to be replaced.

AHT is a good start, though.

Person Man · Dec 17, 2004, 05:02 PM

Originally posted by OreoCookie:
Because some memory errors pop up just after hours of testing. When one of the physics professors I used to work with got a new cluster, first thing they did was run memtest for several days on each of the nodes. One of 20 was faulty and the memory had to be replaced.

AHT is a good start, though.

AHT will do a continuous test, too.