The pln Host Bus Adapter (HBA) driver is a SCSA compliant nexus driver which supports the SPARC Storage Array. The SPARC Storage Array is a disk array device which supports multiple disk drives. The drives are located on several SCSI busses within the SPARC Storage Array. A SPARC microprocessor controls the SPARC Storage Array. Non-volatile RAM is used as a disk cache. The SPARC Storage Array interfaces to the host system using Fibre Channel. An SBus card called the SOC card (see soc(7D)) connects the Fibre Channel to the host system.

The pln driver interfaces with the SOC device driver, soc(7D), and the SPARC Storage Array SCSI target driver, ssd(7D).

The pln driver supports the standard functions provided by the SCSA interface. The driver supports tagged and untagged queuing and auto request sense.

/kernel/drv/pln

ELF kernel module

/kernel/drv/pln.conf

configuration file

prtconf(1M), ssaadm(1M), driver.conf(4), soc(7D), ssd(7D)

Writing Device Drivers

ANSI Small Computer System Interface-2 (SCSI-2)

The messages described below may appear on the system console and in the system log.

This following messages indicate the pln driver was unable to attach to the device. These messages are preceded by "pln%d", where "%d" is the instance number of the pln controller.

Failed to alloc soft state

Driver was unable to allocate space for the internal state structure. Driver did not attach to device. SCSI devices will be inaccessible.

Bad soft state

Driver requested an invalid internal state structure. Driver did not attach to device. SCSI devices will be inaccessible.

Unable to attach

Driver was unable to attach to the hardware for some reason that may be printed. SCSI devices will be inaccessible.