12
AHA-
1
5
2
0
B I
n
st
a
ll
a
ti
o
n
Gu
id
e
Pa
rt
N
u
m
b
er
: 511
162-
00
, Rev
. A
P
ag
e 12 of
1
6
Pr
in
t Spe
c
N
u
m
b
er
:
49
533
9-0
0
Cur
re
n
t D
ate
:
5/
30/
96
La
st
M
odi
fi
ed
: M
a
y 30
, 199
6 3:4
3
pm
Fi
le
Loca
ti
on
:
n
:\
m
a
ri
o
\15
20b
_ig
.n
ec\
152
0b_
ig.
frm
ECN Da
te
:
6
/1
1
/9
5
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAA
AAA
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAA
AAA
I installed the host adapter and my SCSI disk drive, but my computer
will not boot from the SCSI disk drive.
If both SCSI and non-SCSI (e.g., IDE) disk drives are
installed, then the non-SCSI disk drive is always the boot
device. If your system has only SCSI disk drives:
■
Make sure the host adapter BIOS is enabled through
the switch block and in SCSISelect.
■
Make sure the Hard Disk (or Drives) setting in your
computer’s setup program is set to None or No
Drives Installed
, as is required for SCSI hard disk
drives.
■
Make sure the SCSI boot drive is set to SCSI ID 0. If
you have a second SCSI disk drive, assign SCSI ID 1
to the drive.
The system works erratically. It hangs or the host adapter sometimes
cannot find the drives.
Check cable length and integrity. If one or more Fast SCSI
devices are installed, the total length of all cables (inter-
nal and external) connected to the host adapter should
not exceed 3 meters (9.8 feet). If no Fast SCSI devices are
connected, the total length of all cables should not exceed
6 meters (19.7 feet).
When trying to install SCO UNIX, I get an F12 error message; or, SCO
UNIX will not boot up after being installed.
Run SCSISelect and disable Plug and Play Support, Plug
and Play SCAM Support, and Extended BIOS Translation
for DOS Drives > 1 GByte.
Note:
If a partition was created using the above
settings enabled you may need to low level for-
mat the hard drive and reinstall SCO UNIX;
make sure to disable the settings listed above.
I have both a Soundblaster card with a SCSI controller embedded on
it, and an AHA-1520B installed in the same computer. Am I going to
experience any resource conflicts?
The AHA-1520B and the SCSI controller on the Sound-
blaster card are typically both set, by default, to use I/O
port address 340 and IRQ 11. In addition, the Sound-
blaster card may also use I/O port address 330 for its
Midi port. To avoid resource conflicts, make sure to
change the settings on one of the cards.
When trying to run the format/verify SCSI disk utility in SCSISelect, I
get an Unexpected SCSI Command Failure pop-up box with error
information.
The utility probably encountered a problem with the disk
device or the media and therefore cannot run. You can
determine from the Sense Key information (e.g., 06h -
Unit Attention) both the cause of the problem and its
solution. Here are some of the more common Sense Key
values and their meanings:
■
02h - Not ready
—The media is not ready to format.
Be sure that media is inserted in the drive and that
the media is spun up.
■
03h - Medium error
—The disk media may be defec-
tive. If it is a removable-media drive, try using a dif-
ferent disk media. If it is a fixed disk drive, the disk
may be physically damaged. Verify and format the
media with SCSISelect.
■
04h - Hardware error
—The disk drive may be defec-
tive. Consult the hardware documentation and con-
tact the manufacturer.
■
05h - Illegal request
—The Adaptec formatting utility
does not support a low-level format of this device;
however, the device may already be low-level format-
ted by the manufacturer. (This error rarely occurs.)
■
06h - Unit attention
—The removable media may be
write-protected. Disable write protection and run the
utility again.
I disabled the host adapter BIOS via the switch block, and now I can
no longer run SCSISelect to configure the host adapter.
Once the BIOS is disabled via the switch block, you can
no longer access SCSISelect. To disable the BIOS and still
have access to SCSISelect, complete the following:
1
Set the Host Adapter BIOS Address setting on the
switch block to an available BIOS address (see Setting
Host Adapter Switches on page 7).
2
Run the SCSISelect utility, disable the Host Adapter
BIOS setting in Advanced Configuration Options (this
disables the BIOS but still allows access to SCSISelect).
See Starting the SCSISelect Utility on page 8.
