I booted up the new kernel version, 2.6.20; I pretty much copied over my .config that worked in 2.6.19.2, that has worked correctly since that version came out... I looked through the menuconfig to see if any new options had been added, but I'm pretty sure I didn't change anything, and got this error message shortly after booting: bio too big device hdg1 (184 > 128) ------------[ cut here ]------------ kernel BUG at mm/filemap.c:537! invalid opcode: 0000 [#1] Modules linked in: iptable_filter ip_tables x_tables snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss nvidia_agp agpgart CPU: 0 EIP: 0060:[] Not tainted VLI EFLAGS: 00010246 (2.6.20 #1) EIP is at unlock_page+0xd/0x22 eax: 00000000 ebx: c1714a20 ecx: 00000000 edx: c1714a20 esi: c199c45c edi: 00000001 ebp: 1422bf48 esp: f7c8df18 ds: 007b es: 007b ss: 0068 Process md0_raid5 (pid: 901, ti=f7c8c000 task=f7c50050 task.ti=f7c8c000) Stack: c1997920 c016363c c1bca460 c1997920 c1bca460 c0315af2 f7c8df4c f7c8df50 c1bca460 00000000 00000000 1422bf48 0a115f48 00000002 00000000 c1bca460 00000002 f7faf600 fffffffc c0315b92 f7ee6c20 7fffffff f7c8df8c c031f877 Call Trace: [] mpage_end_io_read+0x4c/0x5e [] retry_aligned_read+0x108/0x13a [] raid5d+0x6e/0xcc [] md_thread+0xdc/0xf2 [] autoremove_wake_function+0x0/0x33 [] __wake_up_common+0x35/0x4f [] autoremove_wake_function+0x0/0x33 [] md_thread+0x0/0xf2 [] kthread+0x72/0x97 [] kthread+0x0/0x97 [] kernel_thread_helper+0x7/0x10 ======================= Code: 73 ff ff ff b9 a4 d6 12 c0 89 fa c7 04 24 02 00 00 00 e8 87 77 27 00 83 c4 44 5b 5e 5f c3 53 89 c3 0f ba 30 00 19 c0 85 c0 75 04 <0f> 0b eb fe 89 d8 e8 41 ff ff ff 89$ EIP: [] unlock_page+0xd/0x22 SS:ESP 0068:f7c8df18 The devices it seems to be complaining about are /dev/hdg and /dev/hde, which are physically attached to the PCI0680 Ultra ATA-133 Host Controller listed in lspci.txt. Both drives are 160 GB Western Digital HDDs... don't remember the precise model, but I can find out if necessary. Attached are the output of lspci and my .config; if anyone needs further info, let me know. Please CC replies, not subscribed. Cheers, -Kai