ADAPTEC, INC.
ACB-4525S4000, ACB-4525Z
Data bus: | None (SCSI to ESDI interface) |
Size: | Drive card |
Hard drives supported: | SCSI to two RLL ESDI drives |
Floppy drives supported: | None |
A diagram for these Models was not available, the ACB-4000A is pictured above.
CONNECTIONS | |
Function | Location |
20-pin data cable connector-drive 0 | CN0 |
20-pin data cable connector-drive 1 | CN1 |
34-pin control cable connector-hard drive(s) | CN2 |
4-pin connector-DC power | CN3 |
50-pin SCSI connector-to host adapter | CN4 |
SCSI ADDRESS | ||||
SCSI ID | JP5/Jumper 1 | JP5/Jumper 2 | JP5/Jumper 3 | |
0 | open | open | open | |
1 | closed | open | open | |
2 | open | closed | open | |
3 | closed | closed | open | |
4 | open | open | closed | |
5 | closed | open | closed | |
6 | open | closed | closed | |
» | 7 | closed | closed | closed |
USER CONFIGURABLE SETTINGS | |||
Function | Location | Setting | |
» | Not used | JP2 | N/A |
» | Provides a protocol compatible with ACB-5500 and ACB-4000 families of controllers (4525S4000 only) | JP5/jumper 4 | closed |
Does not allow for compatibility with ACB-5500 and ACB-4000 controllers (4525S4000 only) | JP5/jumper 4 | open | |
» | Zero latency default enabled (4525Z only) | JP5/jumper 4 | closed |
Zero latency default disabled (4525Z only) | JP5/jumper 4 | open | |
» | Spindle motor starts on command | JP5/jumper 5 | closed |
Spindle motor starts on power-up | JP5/jumper 5 | open | |
» | SCSI unit attention disabled | JP5/jumper 6 | closed |
SCSI unit attention enabled | JP5/jumper 6 | open | |
» | SCSI parity check enabled | JP5/jumper 7 | closed |
SCSI parity check disabled | JP5/jumper 7 | open | |
» | Normal operation | JP5/jumper 8 | open |
Self-diagnostic enabled | JP5/jumper 8 | closed |
MISCELLANEOUS TECHNICAL NOTES |
The function of JP1 is to determine the select technique used to interface the host adapter. Soldering Pin-2 to Pin "P" allows for the "pulse" select that is used by controllers designed to work with SCSI hosts. Soldering Pin-2 to Pin "H" or "L" allows for the "handshake" or "level" select signal used in accordance with SCSI standards. Unit attention (JP5/6) is not supported if the JP5/4 jumper is installed on the ACB-4525S4000. |