1 Reply Latest reply: Jan 18, 2007 12:26 PM by David_x
Kris Jones Level 1 Level 1 (55 points)
Hi folks. Over the last few days I've had persisent kernel panics. I've gone through full troubleshooting including Hardware Tests, Tech Tool Pro tests, running fsck -fy, zeroing all data and reinstalling. At last, I've managed to obtain a full panic log, which reads as follows:

Thu Jan 18 18:36:36 2007
panic(cpu 0 caller 0x000A8B80): Uncorrectable machine check: pc = 000000003183B5C0, msr = 0000000040009030, dsisr = 40000000, dar = 0000000036257F82
AsyncSrc = 0000000000000000, CoreFIR = 0000000000000000
L2FIR = 0000000000000000, BusFir = 0000000000000000

Latest stack backtrace for cpu 0:
0x00095564 0x00095A7C 0x00026838 0x000A8B80 0x000A7E10 0x000AB880
Proceeding back via exception chain:
Exception state (sv=0x35F35C80)
PC=0x3183B5C0; MSR=0x40009030; DAR=0x36257F82; DSISR=0x40000000; LR=0x3183B5C0; R1=0x1262ADA0; XCP=0x00000008 (0x200 - Machine check)
0x3183FC08 0x3183AE28 0x3183A8D8 0x3183A590 0x3183A054 0x31839D00
0x31839C9C 0x002CE344 0x31839C54 0x31835B10 0x31E4FECC 0x31E52360 0x31E543F8 0x31DF43A8
0x31DF702C 0x31DFA2F0 0x31DF9474 0x31DF5E6C 0x31DF59DC 0x31DFFA64 0x31E05808 0x31DFFA64
0x31E02F6C 0x31E01E98 0x2297DE18 0x00107E6C 0x000D472C 0x000FD688 0x000D5558 0x000D56BC
0x00239108 0x000FCA10
backtrace continues...
Kernel loadable modules in backtrace (with dependencies):
dependency: com.apple.iokit.IOStorageFamily(1.4)@0x31df0000
dependency: com.apple.iokit.IOATAFamily(1.6.0f2)@0x31834000
Exception state (sv=0x00F8BC80)
PC=0x90005C6C; MSR=0x0200F030; DAR=0x36257F82; DSISR=0x40000000; LR=0x000127C0; R1=0xBFFFEE30; XCP=0x00000030 (0xC00 - System call)

Kernel version:
Darwin Kernel Version 8.0.0: Sat Mar 26 14:15:22 PST 2005; root:xnu-792.obj~1/RELEASE_PPC


Can anyone advise? I'm assuming it's possibly a bad block on my hard disk, but I'd be grateful for advice from anyone who is skilled in reading panic logs.

iMac G4 1ghz USB2, Mac OS X (10.4.5)
  • David_x Level 4 Level 4 (3,010 points)
    If I had to guess, I would say the persistence, despite your actions, suggests knackered hardware - logic board maybe.

    Sounds like it needs checked by Apple. I was pleasantly surprised by the £30 cost of just a diagnosis my local centre charged (although repair was going to be £350 so scrapped the machine