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# 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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location | Function | Location |
|-------------+----------+------------------------+----------|
| 50-pin SCSI | J1 | 4-pin connector - | J3 |
| connector - | | drive active LED | |
| internal | | | |
|-------------+----------+------------------------+----------|
| 68-pin SCSI | J2 | 68-pin SCSI connector | J4 |
| connector - | | - internal | |
| external | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+