(I just posted this over at macosxhints.com, but figured I might as well post it here too) My Old iBook g4 1GHz, has just started kernel panicking. it wont start at all, it kernel panics my MacBook Pro when i try to start it in Target Disk mode, and it wont boot a DiskWarrior CD, or an OS Install disk i have either. I did manage to run an Apple Service Diagnostic Test CD, and it found no errors. ive booted into Single user mode, run fsck -fy and get no errors. I tried: /sbin/mount - uw / and get the following message: " panic(cpu 0 caller 0x00110824): "/SourceCache/xnu/xnu-1228.7.58/bsd/vfs/vfs_journal.c:3109: tr blhdr max_blocks looks bad: 31\n" @/SourceCache/xnu/xnu-1228.7.58/bsd/vfs/vfs_journal.c:3109 Latest stack backtrace for cpu 0: Backtrace: 0x0009B518 0x0009BEBC 0x00029DDB 0x00110824 0x0025EC9C 0x00268FAC 0x0025EF44 0x0025A6B0 0x00106968 0x000F5084 0x000F5628 0x0030ABDC 0x00B2CC8 0x00000000 Proceeding back via exception chain: Exception state (sv=)x1e9ec000) PC=0x92357D7C; MSR=0x0200F030; DAR=0xE00160000; DSISR=0x42000000; LR=0x00002600; R1=0xBFFFF4A0; XCP=0x00000030 (0xC00 - System call) BSD process name corresponing to current thread: mount_hfs Mac OS version 9F33 Kernel Version: Darwin Kernel Version 9.5.0: Wed Sep 3 11:31:44 PDT 2008; root:xnu-1228.7.58~1/RELEASE_PPC System model name PowerBook6,5 " and the computer locks up? is my laptop dead? or is it simply a dead harddrive..... can anyone shed some light on this. the Laptop worked flawlessly for 3yrs.