Adaptec AHA-1520A Manual de servicio descargar pdf (Pagina 18)

aha(7D) Devices SunOS 5.5

NAME aha − low-level module for Adaptec 154x ISA host bus adapters

AVAILABILITY x86

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

I/O subsystem and the Adaptec ISA bus master 154x SCSI (Small Computer System

Interface) controllers. The aha 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 it.

Board Conﬁguration

and Auto

Conﬁguration

The driver attempts to initialize itself in accordance with the information found in the

conﬁguration ﬁle, /kernel/drv/aha.conf. The relevant user conﬁgurable items in this ﬁle

are:

io port reg=0x330,0,0 ioaddr=0x330 ,

dma channel dmachan=6 ,

dma speed dmaspeed=0 ,

bus on time buson=5 , and

bus off time busoff=9 .

The I/O port is the ISA bus I/O address used for communication with the adapter. The

direct memory access (DMA) channel should be set to the manufacturer’s default of 5 for

the primary adapter. The DMA speed, bus on time, and bus off times may be set for

optimum performance with each ISA motherboard. Refer to the Adaptec AHA-1540/1542

User’s Manual for instructions. All jumpers on the board should be set (or veriﬁed) to con-

form the the conﬁguration ﬁle.

The 154xC and the 154xCF should be set to default values. Speciﬁcally, disable BIOS sup-

port for drives with more than 1024 cylinders and more than two BIOS drives. Make sure

that the DMA transfer speed does not exceed the capabilities of the motherboard: most

can not be run faster than the default 5.7.

The default conﬁgurations described in the Adaptec AHA-1540/1542 User’s Manual should

be used for standard conﬁgurations of the system. If more than one board is to be used in

a single system, each must at least occupy a different set of address ranges and use a dif-

ferent DMA channel. Use of a different interrupt level for each board is required.

The default listingof the conﬁguration ﬁle is as follows:

# primary controller [Settings for CD-ROM

name="aha" class="sysbus" reg=0x330,0,0

ioaddr=0x330 dmachan=6 dmaspeed=0 buson=5 busoff=9;

7D-14 modiﬁed 14 Mar 1994

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 433 434

Sin comentarios

Adaptec AHA-1520A Manual de servicio Pagina 18