Adaptec AHA-2740-T User Manual download pdf (Page 69)

Error if Device Not Found

This option determines whether or not the host adapter BIOS

generates an error message when the BIOS is unable to find the

device during boot-up.

When set to yes, the BIOS checks the SCSI ID for a SCSI device;

if none is found, an error message is displayed during boot-up sim-

ilar to the following:

Channel A, Target #1 – Device Not Found

When set to no, the BIOS does not attempt to display en error

message if the SCSI device is not found. The default setting is no.

Send Start Unit Command

This option, which is supported by some SCSI devices, deter-

mines whether or not the SCSI Start Unit Command (SCSI com-

mand 1B) is sent to the SCSI device (most devices do not require

this). The Start Unit Command reduces the load on your comput-

er’s power supply by allowing the host adapter to power-up SCSI

devices one-at-a-time when you boot your system. Otherwise, the

devices will all power-up at the same time.

When set to yes, the SCSI Start Unit Command is sent to the

SCSI device during boot-up. When set to no, the SCSI device will

power-up in its normal fashion. The default setting is no.

If this option is selected for more than one SCSI device, the SCSI

device with the lowest SCSI ID will be sent the SCSI Start Unit

Command first. When the first device is ready and responds to

the host adapter, the next highest SCSI ID with a setting of yes is

sent the SCSI Start Unit Command. This process continues until

all supported devices respond to the host adapter.

Note

If many drives are set to yes for the SCSI Start Unit Command,

system boot time will vary depending on how long each drive

takes to spin-up.

Adaptec AHA-2740 Series User’s Manual

Stock Number: 510381-00 / Rev. C (Page 3-18)

Print Spec Number: 491709-00 Rev C

Current Date: 9/1/93 ECN Date: 9/14/93

AHA-2740 Series User’s Manual

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Adaptec AHA-2740-T User Manual Page 69