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AM-3000M/LC Hardware Installation
3.1.2Attaching 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".
3.1.3Upgrading 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 FIXLOGprogram and
the SCZDVR.DVRCPU 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 FIXLOGprogram and
the SCZRR.DVRRoadrunner 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