> Nov 4 10:36:31 terra kernel: sd 5:0:0:1: SCSI error: return code = 0x000b0000 > Nov 4 10:36:31 terra kernel: end_request: I/O error, dev sdq, sector 5858973568 > Nov 4 10:36:31 terra kernel: printk: 16 messages suppressed. > Nov 4 10:36:31 terra kernel: Buffer I/O error on device sdq, logical block 732371696 > Nov 4 10:36:31 terra kernel: sd 5:0:0:1: SCSI error: return code = 0x000b0000 > Nov 4 10:36:31 terra kernel: end_request: I/O error, dev sdq, sector 5858973568 > Nov 4 10:36:31 terra kernel: Buffer I/O error on device sdq, logical block 732371696 > Nov 4 10:36:32 terra kernel: sd 5:0:0:1: SCSI error: return code = 0x000b0000 > Nov 4 10:36:32 terra kernel: end_request: I/O error, dev sdq, sector 5858973688 > ... > Nov 4 10:36:33 terra kernel: sd 5:0:0:1: SCSI error: return code = 0x000b0000 > Nov 4 10:36:33 terra kernel: end_request: I/O error, dev sdq, sector 5858973688 > Nov 4 10:36:33 terra kernel: sd 5:0:0:1: SCSI error: return code = 0x000b0000 > Nov 4 10:36:33 terra kernel: end_request: I/O error, dev sdq, sector 5858973688 > Nov 4 10:36:33 terra kernel: sd 5:0:0:1: SCSI error: return code = 0x000b0000 > Nov 4 10:36:33 terra kernel: end_request: I/O error, dev sdq, sector 5858973568 It's looking horribly like a disk error: have you checked it? Try badblocks. John