Hi My FC5 box recently behaving weired. It hangs sometimes but cannot determine the cause yet. Its very random but not so frequent. Today since I restarted the machine, I got the Kernel panic message during boot time and freezed. Since I don't know a way to dump the screen output, I copied by hand and here it is: +++++++++++++++++++++++ printing eip: *pde = 00000000 Oops: 0002 [#1] last sysfs file: Modules linked in : CPU: 0 EIP: 0060:[<c042ac14>] Not tainted VLI EFLAGS: 00010286 (2.6.18-1.2239.fc5 #1) EIP is at rcu_process_callbacks+0x7/0x1e eax: 00000000 ebx: 00000000 ecx: fffb6d90 edx: 8d00b280 esi: c0789768 edi: 0000000a ebp: 00000048 esp: c0759fe4 ds: 007b es: 007b ss: 0068 Process swapper (pid: 1, ti=c0759000 task=d7e015b0 task.ti=d7e23000) Stack: c041ffe4 00000001 c04202be d7e23ce8 d7e23000 00000046 c04053c9 Call Trace: [<c041ffe4>] tasklet_action+0x37/0x57 [<c04202be>] __do softirq+0x35/0x75 [<c04053c9>] do_softirq+0x3e/0x99 ======================= Code: 89 46 28 eb 1b 0f ba 2d 00 b3 78 c0 00 19 c0 85 c0 75 0d 5b b8 fc b2 78 c0 5e 5f e9 42 57 ff ff 5b 5e 5f c3 ba 80 b2 78 c0 b8 e0 <6c> 66 c0 e8 a6 fe ff ff ba c0 b2 78 c0 b8 00 6d 66 c0 e9 97 fe EIP: [<c042ac14>] rcu_process_callbacks+0x7/0x1e SS:ESP 0068:c0759fe4 <0>Kernel panic - not syncing: Fatal exception in interrupt ++++++++++++++++++++++++ after reboot, I trid in /var/log/message and some relevant messages I found is: ====================== Dec 3 10:26:27 zeesrvr kernel: hdd: DMA timeout error Dec 3 10:26:27 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } Dec 3 10:26:27 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 3 10:26:27 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 3 10:26:28 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 3 10:26:28 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 3 10:26:28 zeesrvr kernel: ide1: reset: master: error (0x7f?) Dec 3 10:26:58 zeesrvr kernel: hdd: DMA timeout error Dec 3 10:26:58 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } Dec 3 10:27:30 zeesrvr kernel: hdd: DMA timeout error Dec 3 10:27:30 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } Dec 3 10:28:01 zeesrvr kernel: hdd: DMA timeout error Dec 3 10:28:01 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } Dec 4 01:35:20 zeesrvr kernel: hdd: DMA timeout error Dec 4 01:35:20 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } Dec 4 01:35:20 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 4 01:35:20 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 4 01:35:22 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 4 01:35:22 zeesrvr kernel: hdd: task_in_intr: error=0x04 { DriveStatusError } Dec 4 01:35:22 zeesrvr kernel: ide1: reset: master: error (0x7f?) Dec 4 01:35:52 zeesrvr kernel: hdd: DMA timeout error Dec 4 01:35:52 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } Dec 4 01:36:23 zeesrvr kernel: hdd: DMA timeout error Dec 4 01:36:23 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } Dec 4 01:36:54 zeesrvr kernel: hdd: DMA timeout error Dec 4 01:36:54 zeesrvr kernel: hdd: dma timeout error: status=0x58 { DriveReady SeekComplete DataRequest } ========================= I have three dirves currently mounted in this box. 1st is fedora itself (ext3) hda 2nd is backup of ISO images (ext3) hdb 3rd is various backup files (ext3) hdd According to message it seems like something wrong with my 3rd drive but couldn't determine why this problem is happening. Is this Drive Error? can somebody interpret this message for me? I can't figure out if this is hardware related error or the Fedora itself? Thanks