However, Sun never manufactured a Single-Ended Wide Ultra SCSI (40 MB/sec) SBus card (they did make a PCI card version based on the Qlogic ISP-1040B, but that doesn't help SBus-only systems). Thus one might presume that to the only way to get more than 20 MB/sec SCSI on SBus systems, you would have to use an external HVD-SCSI storage array and one of the Sun HVD SCSI cards.
Fortunately, that's not quite the case - at least one third-party manufacturer filled that particular gap, providing a way to use *internal* drives on a 40 MB/sec single-ended SCSI bus...
Part No. | HBA type | Max SCSI Throughput | SCSI controller core |
---|---|---|---|
20-050-0050 | High-Voltage-Differential Wide Fast SCSI | 20 MB/sec | Qlogic ISP-1000 SCSI core |
20-050-0051 | Single-Ended Wide Fast SCSI | 20 MB/sec | Qlogic ISP-1000 SCSI core |
20-050-0060 | High-Voltage-Differential Wide Ultra SCSI | 40 MB/sec | Qlogic ISP-1000U SCSI core |
20-050-0061 | Single-Ended Wide Ultra SCSI | 40 MB/sec | Qlogic ISP-1000U SCSI core |
Interesting enough, these cards are all silkscreened "FWS" (Fast Wide SCSI) but the 0060 and 0061 really are Ultra (Wide) SCSI, using the same PCB but an ISP-1000U chip in place of the "plain" ISP-1000.
A handy feature of these cards is that they use the same "fas" and "isp" device-drivers as the Sun cards, so will work "as is" with stock Solaris 2.6 and later editions.
Ask to see high-res pictures beforehand if at all possible. The HVD cards have vertically-standing yellow rectangular components on them (presumably something to do with HVD signal drive?).