Adaptec 1520B - AHA Storage Controller Fast SCSI 10 MBps Install Manual Download Page 13

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I have some older SCSI-1 devices installed and my computer is
operating erratically or hangs.

Try changing the following device settings in SCSISelect
for your older SCSI-1 device: Set Initiate Sync Negotiation
to No; Set the Maximum Sync Transfer Rate to 5.0.

One of the SCSI devices on my computer does not allow me to
disable termination. How can I install it on the SCSI bus?

If it is an external SCSI device, install the device as the
last device of the external daisy chain. If it is an internal
SCSI device, install the device at the end of the internal
SCSI cable.

The screen is difficult to read when I run the SCSISelect utility.

Press F5 to toggle the display between color and mono-
chrome modes. This may make it easier for you to read
the screen.

I cannot use my host adapter in a non-Plug and Play system.

Check for possible resource conflicts between the host
adapter and other cards installed in your computer; the
cards may have conflicting BIOS address, I/O port
address, and IRQ settings. Try changing these settings on
the host adapter one at a time to isolate the conflict.

I cannot use my host adapter in a Plug and Play System

Try setting ISA Plug and Play Support to Disable in the
Advanced Configuration Options of SCSISelect. Your
host adapter is now a Legacy card, and you must config-
ure it manually with the DIP switches and SCSISelect.

Common Error Messages

“Can not locate any host adapter at either 340h or 140h IO Port
address. Possible IO Port address conflict”

This message occurs when the BIOS fails to locate a valid host
adapter in the system—Check for an I/O port address con-
flict between the host adapter and other cards installed in
your computer.

“Target connected, but not ready”

This message occurs when the host adapter requests data from
an installed SCSI device and does not receive an answer—Try
setting the Send Start Unit Command to Yes for the host
adapter. If your device is a removable-media drive, make
sure the media is inserted in the drive. If the message still
appears, follow the drive manufacturer’s instructions to
make sure the drive is set to spin up when the power is
switched

“Host Adapter diagnostic error!”

This message usually indicates that the host adapter is not
working correctly—Check the items in Troubleshooting
Checklist on page 11. If the problems persists, contact
Adaptec customer support.

“No ROM Basic, system halted”

This message usually indicates that the first hard drive in the
system has not been set as the active or bootable partition—
Start the computer with a bootable diskette. Run

Fdisk

from the floppy and make sure that the partition on the
hard drive is set to Active. (Use

Fdisk

and the option

Show Partition Information.) If the hard drive partition is
not shown as active, then use option number 2 of

Fdisk

make the partition active.

Contacting NEC

■

For technical support (answers to technical questions,
information about the NEC BBS, Web site, and access
to our FastFacts system) call 1-800-632-4667.

■

For pre-sales information and product literature, call
1-800-NEC-INFO.

■

The NEC FastFacts system provides answers to com-
mon questions, product literature, and current infor-
mation about NEC products. The NEC FastFacts
system is available 24 hours a day, 7 days a week, at
1-800-366-0476.

■

The NEC Web server provides product information,
driver updates, and answers to common questions, as
well as direct ordering through NEC. The NEC server
is available 24 hours a day, 7 days a week, at

http://www.nec.com

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