LSI U320 scsi controller

just tried to use the controller mentioned in the title but there were some issues.
i'm running 10.5.7.

system booted fine and i can see the controller and the disk:

Parallel SCSI:

    SCSI Parallel Domain 0:

      Vendor: LSILogic
      Product: Ultra320 SCSI HBA
      Revision: Firmware 1.3.6.0
      Initiator Identifier: 7
      Signal Type: Single Ended
      Description: Channel B

        SCSI Target Device @ 0:

          Manufacturer: COMPAQ
          Model: MAB3091SP
          Revision: 0814
          SCSI Target Identifier: 0
          SCSI Device Features: Wide, Sync
          SCSI Initiator/Target Features: Wide, Sync
          Peripheral Device Type: 0

            SCSI Logical Unit @ 0:

              Manufacturer: COMPAQ
              Model: MAB3091SP
              Revision: 0814
              SCSI Logical Unit Identifier: 0

    SCSI Parallel Domain 1:

      Vendor: LSILogic
      Product: Ultra320 SCSI HBA
      Revision: Firmware 1.3.6.0
      Initiator Identifier: 7
      Signal Type: Low Voltage Differential
      Description: Channel A

BUT i can't use it. it's not showing up anywhere. there's not even an rdisk.

oh and the led on the disk is blinking constantly since osx booted.
any help is welcome