The pcscsi module provides low-level interface functions between the common disk/tape I/O subsystem and the Am53C974 (PCscsi), Am53C974A (PCscsi II), Am79C974 (PCnet-SCSI) (SCSI device only), and the Qlogic QLA510 SCSI controllers.
The pcscsi module can be configured for disk and streaming tape support for one host bus adapter device. Each host bus adapter device must be the sole initiator on a SCSI bus. Auto-configuration code determines if the adapter is present on the PCI bus, what its configuration is, and what types of devices are attached to it.
For PCI devices, configuration is done through the PCI BIOS. Configuration settings can be accessed through a CMOS utility.
The net component of the PCnet-SCSI host bus adapter requires the Solaris pcn(7D) driver. See AMD PCnet Ethernet (PCnet-PCI, PCnet-PCI II, PCnet-Fast for information on Ethernet configuration capabilities.
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.
The driver attempts to initialize itself in accordance with the PCI BIOS configuration settings..
There are no user-configurable options; information found in the pcscsi.conf configuration file is used by the I/O subsystem only.
See attributes(5) for descriptions of the following attributes:
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|