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# DISTRIBUTED PROCESSING TECHNOLOGY
PM3755U2B
Card Type Hard drive controller
Chip Set Unidentified
Maximum Onboard 256MB DRAM
Memory
I/O Options SCSI connectors (2), expansion module
connectors (2)
Hard Drives Up to 15 Ultra2/LVD Wide SCSI devices
supported
Up to 45 Wide SCSI-2 or Ultra-wide SCSI
devices with expansion board upgrades
Floppy drives None
supported
Data Bus 64-bit PCI
Card Size Full-length
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------+-------+-------------------+-------|
| 32-bit header | J7 | 68-pin SCSI | J11 |
| connector to | | connector Ch. 0 - | |
| expansion module | | external | |
|------------------------+-------+-------------------+-------|
| 64-bit header | J8 | 4-pin connector - | P6 |
| connector to | | drive active LED | |
| expansion module | | | |
|------------------------+-------+-------------------+-------|
| 68-pin SCSI connector | J10 | | |
| Ch. 0 - internal | | | |
|------------------------------------------------------------|
| Note: Header connector to BB4050 battery module is |
| unidentified |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------+-------+------------------|
| NVRAM reset to default settings | P4 | Pins 1 & 2 |
| | | closed |
|---------------------------------+-------+------------------|
| NVRAM setup parameters retained | P4 | Pins 3 & 4 |
| | | closed |
|---------------------------------+-------+------------------|
| Load enabled | P9 | Pins 1 & 2 |
| | | closed |
|---------------------------------+-------+------------------|
| Run enabled | P9 | Pins 3 & 4 |
| | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 16MB | (1)2MB x 64 | None | None | None |
|-------+-------------+------------+------------+------------|
| 32MB | (1)2MB x 64 | (1)2MB x | None | None |
| | | 64 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (1)2MB x 64 | (1)2MB x | (1)2MB x | None |
| | | 64 | 64 | |
|-------+-------------+------------+------------+------------|
| 64MB | (1)2MB x 64 | (1)2MB x | (1)2MB x | (1)2MB x |
| | | 64 | 64 | 64 |
|-------+-------------+------------+------------+------------|
| 64MB | (1)8MB x 64 | None | None | None |
|-------+-------------+------------+------------+------------|
| 80MB | (1)8MB x 64 | (1)2MB x | None | None |
| | | 64 | | |
|-------+-------------+------------+------------+------------|
| 144MB | (1)8MB x 64 | (1)8MB x | (1)2MB x | None |
| | | 64 | 64 | |
|-------+-------------+------------+------------+------------|
| 160MB | (1)8MB x 64 | (1)8MB x | (1)2MB x | None |
| | | 64 | 64 | |
|-------+-------------+------------+------------+------------|
| 128MB | (1)8MB x 64 | (1)8MB x | None | None |
| | | 64 | | |
|-------+-------------+------------+------------+------------|
| 192MB | (1)8MB x 64 | (1)8MB x | (1)8MB x | None |
| | | 64 | 64 | |
|-------+-------------+------------+------------+------------|
| 208MB | (1)8MB x 64 | (1)8MB x | (1)8MB x | (1)2MB x |
| | | 64 | 64 | 64 |
|-------+-------------+------------+------------+------------|
| 256MB | (1)8MB x 64 | (1)8MB x | (1)8MB x | (1)8MB x |
| | | 64 | 64 | 64 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-------+--------------+----------+--------------------------|
| LED1 | Unidentified | On | Controller is ready; |
| | | | interrupts are enabled |
|-------+--------------+----------+--------------------------|
| LED1 | Unidentified | Off | Controller is inactive |
|-------+--------------+----------+--------------------------|
| LED1 | Unidentified | Blinking | Controller is active |
|-------+--------------+----------+--------------------------|
| LED2 | Unidentified | On | Non-maskable interrupt |
| | | | (NMI) detected |
|-------+--------------+----------+--------------------------|
| LED2 | Unidentified | Off | NMI not detected |
|-------+--------------+----------+--------------------------|
| LED3 | Unidentified | On | Controller in idle loop |
| | | | mode |
|-------+--------------+----------+--------------------------|
| LED3 | Unidentified | Off | Controller not in idle |
| | | | loop mode |
|-------+--------------+----------+--------------------------|
| LED4 | Unidentified | On | Interrupt is being |
| | | | processed |
|-------+--------------+----------+--------------------------|
| LED4 | Unidentified | Off | Interrupt is not being |
| | | | processed |
|-------+--------------+----------+--------------------------|
| LED5 | Unidentified | Off | Not used |
|-------+--------------+----------+--------------------------|
| LED6 | Unidentified | On | Cache controller is |
| | | | using DMA to perform a |
| | | | data transfer |
|-------+--------------+----------+--------------------------|
| LED6 | Unidentified | Off | Cache controller is not |
| | | | using DMA to perform a |
| | | | data transfer |
|-------+--------------+----------+--------------------------|
| LED7 | Unidentified | On | Parity is being |
| | | | generated |
|-------+--------------+----------+--------------------------|
| LED7 | Unidentified | Off | Parity is not being |
| | | | generated |
|-------+--------------+----------+--------------------------|
| LED8 | Unidentified | On | Command detected on SCSI |
|-------+--------------+----------+--------------------------|
| LED8 | Unidentified | Off | Command not detected on |
| | | | SCSI |
|-------+--------------+----------+--------------------------|
| IRQ | Unidentified | On | Interrupt has been |
| | | | activated on host PCI |
| | | | bus |
|-------+--------------+----------+--------------------------|
| IRQ | Unidentified | Off | Interrupt has not been |
| | | | activated on host PCI |
| | | | bus |
|-------+--------------+----------+--------------------------|
| ECCEN | Green | On | Cache is ECC protected |
|-------+--------------+----------+--------------------------|
| ECCEN | Green | Off | Cache is not ECC |
| | | | protected |
|-------+--------------+----------+--------------------------|
| ECCER | Red | On | Error detected. Cache |
| | | | failure information |
| | | | reported |
|-------+--------------+----------+--------------------------|
| ECCER | Red | Off | Error not detected |
+------------------------------------------------------------+
(IMG) IMG 2
SX4055U2-1 EXPANSION MODULE
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-------------------+-------+------------------------+-------|
| 68-pin SCSI | J2 | 64-bit auxiliary | P3 |
| connector Ch. 1- | | header connector to | |
| internal | | Controller card | |
|-------------------+-------+------------------------+-------|
| 68-pin SCSI | J3 | Header connector to | P5 |
| connector Ch. 1 - | | Controller card | |
| external | | | |
|------------------------------------------------------------|
| Note: SX4055U2-1 expansion module supports an additional |
| 15 Ultra2/LVD Wide SCSI devices |
+------------------------------------------------------------+
(IMG) IMG 3
SX4055U2-2
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|---------------------+-------+----------------------+-------|
| 68-pin SCSI | J1 | 68-pin SCSI | J4 |
| connector Ch. 2 - | | connector Ch. 2 - | |
| external | | internal | |
|---------------------+-------+----------------------+-------|
| 68-pin SCSI | J2 | 64-bit auxiliary | P3 |
| connector Ch. 1- | | header connector to | |
| internal | | Controller card | |
|---------------------+-------+----------------------+-------|
| 68-pin SCSI | J3 | Header connector to | P5 |
| connector Ch. 1 - | | Controller card | |
| external | | | |
|------------------------------------------------------------|
| Note: SX405U2-2 expansion module supports an additional 30 |
| Ultra2/LVD Wide SCSI devices |
+------------------------------------------------------------+
(IMG) IMG 4
SX4055F FC-AL
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------+-------+---------------------+-------|
| HSSDC FC-AL | P2 | Header connector to | P5 |
| connector Ch. 1 - | | Controller card | |
| external | | | |
|----------------------+-------+---------------------+-------|
| 64-bit auxiliary | P3 | | |
| header connector to | | | |
| Controller card | | | |
|------------------------------------------------------------|
| Note: Fibre channel provided by expansion module supports |
| up to 126 additional devices |
+------------------------------------------------------------+
(IMG) IMG 5
BB4050 BATTERY BACKUP MODULE
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------+--------+-------------------------+--------|
| Battery cable | J1 | Header connector to | P12 |
| connector | | Controller card | |
|------------------------------------------------------------|
| Note: BB4050 battery backup module may only be installed |
| on a PM3755U2B Controller |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+--------------+--------+-----------------------------|
| LED1 | Unidentified | On | Trickle charge activity |
| | | | detected |
|------+--------------+--------+-----------------------------|
| LED1 | Unidentified | Off | Trickle charge activity not |
| | | | detected |
|------+--------------+--------+-----------------------------|
| LED2 | Unidentified | On | Charging/recharging mode |
| | | | initiated |
|------+--------------+--------+-----------------------------|
| LED2 | Unidentified | Off | Battery module not charging |
+------------------------------------------------------------+