Alpha Microsystems Eagle 100 Specifikace stáhnout pdf (Strana 48)

CHAPTER 4

AM-3000 VME Hardware Installation

4.1HARD DRIVE CONSIDERATIONS

Whether you’re installing a new pre-configured Roadrunner bootable SCSI disk drive, or

you’re going to use your existing hard drive as the main system boot drive, there are

certain considerations that must be taken into account before proceeding with the actual

hardware upgrade.

The following sub-sections highlight the various hard drive configurations and how to

deal with them. You should read and understand the following information before

attempting the Roadrunner hardware upgrade.

Remember - before attempting any software or hardware upgrade, be sure you have a

current backup of your system, and a verified warm-boot tape!

4.1.1Roadrunner Boot PROM Routine

The boot PROM on the Roadrunner is programmed to look first at the SASI port on the

AM-185 or 185-50 board. If a SCSI drive addressed as I.D.0 is detected on the SASI

port, it will be selected as the boot device. If no device is detected on the SASI port,

then the boot PROM will check the Roadrunner’s SCSI port for a boot drive.

4.1.2Attaching Hard Drives to Opposite Bus Ports

On an AM-3000 VME system 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.

PDI-00172-60, Rev. A02

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Alpha Microsystems Eagle 100 Specifikace Strana 48