Alpha Microsystems Eagle 100 Specifications download pdf (Page 33)

Page 3-2 AM-3000M/LC Hardware Installation

3.1.2Attaching Hard Drives to Opposite Bus Ports

On a standard AM-3000M you may attach a SCSI hard drive to the opposite SASI/SCSI

port and treat it much the same as a sub-system drive. That is, if your system is booting

on the Roadrunner’s SCSI port, you could create a disk driver using FIXLOG and

SCZDVR.DVR to access a SASI/SCSI-1 hard drive on the CPU SASI port. Or, if you’re

booting on the SASI port, you could create a disk driver using FIXLOG and SCZRR.DVR

to access a SCSI-1/ SCSI-2 hard drive on the Roadrunner’s SCSI port. Remember

however, that both drives should not

be addressed as I.D.0, as the Roadrunner’s boot

routine will try to boot from the SASI port first if it sees a drive connected as I.D.0. Also,

no peripheral device other than a hard disk drive

can be accessed, if it’s attached to the

opposite bus port.

On an AM-540 modified CPU board, part of the rework required to enable the AM-540

disk accelerator board affects the operation of the CPU SASI port. For this reason you

cannot

attach a sub-system disk drive to the CPU SASI port unless the AM-540 rework

is "un-installed".

3.1.3Upgrading a Standard AM-3000M System

If you are installing a new pre-configured

Roadrunner bootable

SCSI drive along with

the Roadrunner hardware upgrade, use the following steps as a guide:

1.If your existing drive is SASI/SCSI-1 and you’re going to leave it attached

to the CPU SASI port:

A.Change its drive I.D. to 1, 2, or 3 so that the new Roadrunner boot

PROM will not attempt to boot from it.

B.After the Roadrunner upgrade is completed, create a sub-system

driver to access your original drive using the FIXLOGprogram and

the SCZDVR.DVRCPU SASI port driver.

C. VUE the new Roadrunner’s boot INI and add the sub-system device

under the DEVTBL, BITMAP, and SYSTEM statements.

2.If your existing drive is SCSI-1 or SCSI-2 and you’re going to attach it to

the Roadrunner’s SCSI port as an additional drive:

A.Change its drive I.D. to something higher than zero (usually I.D. 1)

so it won’t conflict with the new Roadrunner boot drive.

B.After the Roadrunner upgrade is completed, create a sub-system

driver to access your original drive using the FIXLOGprogram and

the SCZRR.DVRRoadrunner SCSI port driver.

C. VUE the new Roadrunner’s boot INI and add the sub-system device

under the DEVTBL, BITMAP, and SYSTEM statements.

PDI-00172-60, Rev. A02

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Alpha Microsystems Eagle 100 Specifications Page 33

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