Adaptec AHA-1740A - Manual (Page 50)

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Power should be cycled OFF and ON after changing any
values on a host adapter,
setup program, or SCSI device
to be sure that the new initial values are loaded.
•
Make sure that SCSI parity is consistently enabled or dis-
abled on all devices on the SCSI bus.
•
Verify that the host adapter and the SCSI devices are
properly configured and installed.
•
Make sure that the SCSI bus is properly terminated.
•
Make sure that the disk has a DOS partition and a DOS
format.
•
System works erratically, hangs, or the host adapter can-
not always find the drives.
•
Check SCSI parity for consistency.
•
Check termination.
•
Check cable length and integrity.
•
If host adapter and drive LED remain on during a hang
condition, make sure that the SCSI drive conforms to the
Common Command Set Revision 4B (CCS 4B).
If only the host adapter LED remains on during a hang, it is prob-
ably a host adapter to computer system interface problem. The
system may not be capable of First-Party DMA transfers. Check
with the system manufacturer for information.
Some older motherboard BIOS do not support freeform data for
the EISA configuration. This support is required in order to
changed the default Host Adapter options. If freeform data is not
supported, the AHA-1740A/1742A/1744 can still be used, but the
Host Adapter option defaults will always be used.
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adaptec AHA-1740A/1742A/1744
7-6