I'm trying to debug a SCSI problem on an embedded system with a MPC8540 CPU and LSI53C1010-66 controller. The system is running a 2.4.25 kernel and sym-2.1.19-pre3 driver. A Seagate 300 GB drive is attached to one channel of the controller and an Adtron SDDS-01A1 PC Card reader is attached to the other channel. Everything works fine until I try to use the hard drive and PC card at the same time. Then I get SCSI timeouts for the PC card reader and eventually I/O errors for the PCCard devices. Continously copying a file from the PCCard reader to the hard drive results in these messages in the kernel log : sym0:0:0: queue depth is now 135 sym0:0:0: queue depth is now 136 sym0:0:0: queue depth is now 137 Command timed out active=4 busy=4 failed=1 Command timed out chan=0 target=0 lun=1 Command timed out active=4 busy=4 failed=2 Command timed out chan=0 target=0 lun=0 Command timed out active=4 busy=4 failed=3 Command timed out chan=0 target=0 lun=1 Command timed out active=4 busy=4 failed=4 Command timed out chan=0 target=0 lun=0 sym1:0:0: ABORT operation started. sym1:0:0: ABORT operation timed-out. sym1:0:0: ABORT operation started. sym1:0:0: ABORT operation timed-out. sym1:0:1: ABORT operation started. sym1:0:1: ABORT operation timed-out. sym1:0:1: ABORT operation started. sym1:0:1: ABORT operation timed-out. sym1:0:0: DEVICE RESET operation started. sym1:0:0: DEVICE RESET operation timed-out. sym1:0:1: DEVICE RESET operation started. sym1:0:1: DEVICE RESET operation timed-out. sym1:0:0: BUS RESET operation started. sym1: SCSI BUS reset detected. sym1: enabling clock multiplier sym1: Downloading SCSI SCRIPTS. sym1: SCSI BUS has been reset. sym1: command processing suspended for 3 seconds sym1:0:0: BUS RESET operation complete. sym1: command processing resumed sym1:0:sync msgout: 1-3-1-29-f. sym1:0:sync msgin: 1-3-1-29-f. sym1:0:sdtr: ofs=15 per=41 div=5 fak=1 chg=0. sym1:0:sync msgout: 1-3-1-29-f. sym1:0:sync msgin: 1-3-1-29-f. sym1:0:sdtr: ofs=15 per=41 div=5 fak=1 chg=0. sym1:0:sync msgout: 1-3-1-29-f. sym1:0:sync msgin: 1-3-1-29-f. sym1:0:sdtr: ofs=15 per=41 div=5 fak=1 chg=0. UNIT_ATTENTION ? This architecture does not implement dump_stack() I/O error: dev 08:21, sector 1099392 SCSI disk has been changed. Prohibiting further I/O. from scsi_request_fn I/O error: dev 08:21, sector 1099896 I/O errors never occur for the hard drive, just the PC Card reader device. Also copying files to /dev/null on the PCCard reader and hard drive simultaneously results in about 2-3 MB/s on the hard drive, verus 50-60 MB/s with just the hard drive alone. Has anyone seen a similar problem ? What's the best stratgey to debug this kind of problem ? Thanks ! - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
