Hi All,

We have ported u-boot and linux-2.4.22 on to a custom POwerPC MPC8280 board. Everything is working fine except the Serial ATA driver. We are using SATA150 Tx2plus serial ata card which sits on PCI. We got the driver source code from the public domain. We have integrated the driver source code to the kernel and driver module loads itself when linux kernel is coming up. As soon the module is loaded we get a device information string as "aMtxro6 0Y080M". (We have tested the same driver on a x86 machine and there the driver works perfectly and the device identification string got there is "Maxtor 6Y080M0".) After this the board comes up correctly. When we try to partition the device using the fdisk command (fdisk /dev/sda), we get the following errors:

======================================================= # fdisk /dev/sda pdc-ultra:[warning] disk1 ATA timeoutat LBA 0x0 pdc-ultra:[warning] submit cam busy scsi : aborting command due to timeout : pid 10, scsi0, channel 0, id 0, lun 0 0x28 00 00 00 00 00 00 00 08 00 pdc-ultra:[info] scsi abort success pdc-ultra:[warning] disk1 ATA timeoutat LBA 0x0 pdc-ultra:[warning] submit cam busy scsi : aborting command due to timeout : pid 11, scsi0, channel 0, id 0, lun 0 0x28 00 00 00 00 00 00 00 08 00 pdc-ultra:[info] scsi abort success pdc-ultra:[warning] disk1 ATA timeoutat LBA 0x0 pdc-ultra:[warning] submit cam busy scsi : aborting command due to timeout : pid 12, scsi0, channel 0, id 0, lun 0 0x28 00 00 00 00 00 00 00 08 00 pdc-ultra:[info] scsi abort success scsi0 channel 0 : resetting for second half of retries. SCSI bus is being reset for host 0 channel 0. pdc-ultra:[warning] scsi reset channel1 OK pdc-ultra:[warning] disk1 ATA timeoutat LBA 0x0 pdc-ultra:[warning] submit cam busy scsi : aborting command due to timeout : pid 13, scsi0, channel 0, id 0, lun 0 0x28 00 00 00 00 00 00 00 08 00 pdc-ultra:[info] scsi abort success pdc-ultra:[warning] disk1 ATA timeoutat LBA 0x0 pdc-ultra:[warning] submit cam busy SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 27070000 I/O error: dev 08:00, sector 0 pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy scsi0 channel 0 : resetting for second half of retries. SCSI bus is being reset for host 0 channel 0. pdc-ultra:[warning] scsi reset channel1 OK pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 27070000 I/O error: dev 08:00, sector 2 pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy scsi0 channel 0 : resetting for second half of retries. SCSI bus is being reset for host 0 channel 0. pdc-ultra:[warning] scsi reset channel1 OK pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 27070000 I/O error: dev 08:00, sector 4 pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy scsi0 channel 0 : resetting for second half of retries. SCSI bus is being reset for host 0 channel 0. pdc-ultra:[warning] scsi reset channel1 OK pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy pdc-ultra:[warning] submit cam busy SCSI disk error : host 0 channel 0 id 0 lun 0 return code = 27070000 I/O error: dev 08:00, sector 6

Unable to read /dev/sda # ======================================================= During kernel compilation we have selected the SCSI support and SCSI Disk support. Apart from these do we have to select any other configuration during menuconfig? If anyone has any idea as what is causing this problem, please help.

regards, Sudhakar.

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