Technical data

SunOS 5.5 Devices esa(7D)

NAME esa − low-level module for Adaptec 7770 based SCSI controllers

AVAILABILITY x86

DESCRIPTION The esa module provides low-level interface routines between the common disk/tape

I/O system andSCSI (Small Computer System Interface) controllers based on the Adap-

tec AIC-7770 SCSI chip. These controllers include the Adaptec 2740 and 2840, as well as

motherboards with an embedded AIC-7770 SCSI chip.

The esa module can be conﬁgured for disk and streaming tape support for one or more

host adapter boards, each of which must be the sole initiator on a SCSI bus. Auto

conﬁguration code determines if the adapter is present at the conﬁgured address and

what types of devices are attached to the adapter. Each controller may support one or

two SCSI busses, depending on the manufacturer’s implementation.

FILES /kernel/drv/esa.conf conﬁguration ﬁle for the esa driver. There are no user-

conﬁgurable options in this ﬁle.

modiﬁed 29 Apr 1994 7D-103