AMD PCscsi, PCscsi II, PCnet-SCSI and QLogic QLA510 HBAs

Solaris Device Driver:	`pcscsi`
Device Type:	SCSI
Adapter:	QLogic QLA510
Chips:	AMD 53C974 (PCscsi), 53C974A (PCscsi II), Am79C974 (PCnet-SCSI) (SCSI device only) QLogic FAS974
Bus Type:	PCI
Systems Supported:	PCnet-SCSI chip is integrated in the HP Vectra XU 5/90 and Compaq Deskpro XL systems

Preconfiguration Information

Only the SCSI portion of the PCnet-SCSI host bus adapter is discussed here; the net portion requires a separate Solaris driver (pcn). See "AMD PCnet Ethernet (PCnet-PCI, PCnet-PCI II, PCnet-Fast)" for configuration information about Ethernet capabilities.

Known Problems and Limitations

Occasional data corruption has occurred when pcn and pcscsi drivers in HP Vectra XU 5/90 and Compaq Deskpro XL systems are used under high network and SCSI loads. These drivers do not perform well in a production server.

A possible workaround is to disable the pcn device with the system BIOS and use a separate add-in network interface.
The SCSI Tagged Queuing option is not supported.