Sub-Bios Systems For Scsi Controllers; Booting From A Device Connected To The Lan+Scsi Combo Board - HP X Class 500/550MHz Reference Manual

Sub-BIOS Systems for SCSI Controllers

There are three SCSI BIOS systems that may be loaded on HP V
Workstations, each to the exclusion of each other.
HP V Personal Workstations can be divided into two groups: those equipped with
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HP FastRAID accessory and those not. Depending on whether a particular model has HP
FastRAID, one of two Adaptec sub-BIOS systems will be loaded: either Adaptec 7880 BIOS
or Adaptec Array1000 BIOS. If no HP FastRAID card is detected during boot-up, the
Adaptec 7880 BIOS will be loaded. If, on the other hand, an HP FastRAID card is installed,
Adaptec Array1000 BIOS will be loaded without loading the Adaptec 7880 BIOS.
NOTE Only one of the above Adaptec SCSI BIOS systems may be loaded.
In addition, all models of HP V
LAN+SCSI Combo board, which contains a Symbios Logic 16-bit SCSI controller. This
controller is configured by a third sub-BIOS system, Symbios SCSI BIOS, which is
described in detail in the section "Symbios Logic SCSI Configuration Utility" in this
chapter.

Booting from a Device Connected to the LAN+SCSI Combo Board

On models with the HP FastRAID accessory installed, in order to boot from a device
connected to the LAN+SCSI Combo board, the Adaptec Array1000 BIOS must first be
disabled from the main BIOS setup.
To disable the Adaptec Array1000 BIOS and load the Symbios SCSI BIOS, perform the
following steps:
1. Go into the Setup program by pressing
displayed immediately after starting the Personal Workstation.
2. Listed under the "Advanced" sub-menu, are:
• Internal SCSI 16bits (Adaptec) [which refers to the Adaptec 7880 BIOS]
• External and Internal SCSI 16/8-bit (Symbios) [which refers to the Symbios SCSI
BIOS]
3. Select "Internal SCSI 16bits (Adaptec)" and disable "Option ROM Scan".
4. Return to "Advanced" sub-menu.
5. Select "external SCSI and internal SCSI 16/8-bit (Symbios)" and enable
"Options ROM Scan".
6. Save changes and exit the Setup program
NOTE In order to detect a FastRAID hard disk drive after having booted under
Windows NT 4.0 on a device connected to the LAN+SCSI Combo board, the
HP FastRAID driver, array1000.sys, has to be installed.
Chapter 4
Personal Workstations are equipped with a
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while the initial "HP V
F2
Sub-BIOS Systems for SCSI Controllers
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" logo is
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HP BIOS
Personal
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