ATTO TECHNOLOGY, INC.

EXPRESSPCI-PSC

Card Type               Hard drive controller card
Processor               RISC
Hard Drives supported   Up to 15 Ultra/Wide SCSI devices
Floppy drives supported None
Data Bus                32-bit PCI
Card Size               Half-length, full-height card
RAID levels supported   0

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                                CONNECTIONS

       Function           Location          Function           Location

  50-pin SCSI                J1         4-pin connector -         J3
  connector - internal                  drive active LED

  68-pin SCSI                J2         68-pin SCSI               J4
  connector - external                  connector -
                                        internal

                             TERMINATION LEDS

     LED            Color           Status             Condition

    LED1        Unidentified          On         Low order byte on SCSI
                                                   channel terminated

    LED1        Unidentified         Off           Low order byte not
                                                       terminated

    LED2        Unidentified          On         High-order byte on SCSI
                                                   channel terminated

    LED2        Unidentified         Off           High order byte not
                                                       terminated

            Note: The ExpressPCI-PSC automatically configures its own
            termination and provides feed back via two LEDs located on
            the top edge of the card. Exceptions to automatic
            configuration are listed in the Miscellaneous Technical Notes
            table.

                       MISCELLANEOUS TECHNICAL NOTES

            Only two SCSI connectors (J1&J2, J2&J3 or J3&J1) can be used
            simultaneously. All three SCSI connectors cannot be used at
            one time.

            Termination must be manually configured under two conditions.
            The ExpressPCI-PSC will not automatically configure
            termination when narrow (8-bit) devices are attached to the
            internal connector and wide (16-bit) devices are attached to
            the external connector, or vice-versa. In these cases, the
            on-board terminators must be set to terminate high-order byte
            (the ExpressPCI-PSC must lies at the end of the high-order
            bus). Refer to the ExpressPro-Tools Bus Configuration
            Utilities section in the ExpressPro-Tools User’s Manual for
            appropriate settings. Active termination is strongly
            recommended.