NAME

wdex − low-level controller module

DESCRIPTION

The wdex module provides low-level interface routines between the High Performance Device Driver (see hpdd(7)) and the Western Digital WD7000-EX Extended Industry Standard Architecture (EISA) Intelligent Small Computer System Interface (SCSI) Host Adapters.  It can be configured for disk or streaming tape support for one or more host adapter boards, each of which must be the sole initiator on a SCSI bus.  The low-level code tries to match the software configuration with the hardware configuration (see the “INTERACTIVE UNIX Operating System Maintenance Procedures”) and determines what types of devices are attached to the adapter. It handles simultaneous requests for all devices, overlapping operations where the devices will permit. 

For information on configuring a kernel to include the wdex module, refer to the “INTERACTIVE UNIX Operating System Maintenance Procedures.”

Board Configuration

If the WD7000-EX adapter is to be used as the primary adapter for the installation kernel, it must be configured to operate in WD7000-ASC compatibility mode (see wdasc(7), paying particular attention to the discussion on limitations).

Once the installation kernel is installed, kconfig(1) may be used to configure the wdex module and allow the extended (EISA) features of the WD7000-EX adapter to be used.  This will require board-level configuration using the EISA configuration utility. 

If more than one board is to be used in a single system, each must occupy a different interrupt level. 

SEE ALSO

aha1520(7), aha1540(7), aha1740(7), athd(7), bt742(7), disk(7), dpt20xx(7), hpdd(7), ida(7), mcesdi(7), mcst(7), tape(7), tmc8x0(7), wdasc(7).  “INTERACTIVE UNIX Operating System Maintenance Procedures” in the INTERACTIVE UNIX Operating System Guide.

ADDED VALUE

This entry, supplied by INTERACTIVE Systems Corporation, is an extension of UNIX System V. 

\*U  —  Version 1.0