5
AHA-
2
9
4
4
U
W
I
n
st
a
ll
at
io
n
Gu
id
e
Pa
rt
N
u
m
b
er
: 511
248-
00
, Rev
. A
P
ag
e 5 of
1
2
Pr
in
t Spe
c
N
u
m
b
er
:
49
568
6-0
0
Cur
re
n
t D
ate
:
11/
13/
96
La
st
M
odi
fi
ed
: N
o
v
e
m
b
er
13,
1
996 12
:5
7
p
m
Fi
le
Lo
ca
ti
on:
d:
\m
ar
io
\294
4uw
.i
g
\29
44u
w
ig.
fr
m
ECN Da
te
:
1
1
/1
9
/9
6
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
Using SCSISelect
The AHA-2944UW includes the onboard, menu-driven
SCSISelect configuration utility, which allows you to
change host adapter settings without opening the com-
puter or handling the board. SCSISelect also contains
SCSI disk utilities that let you low-level format or verify
the disk media of your SCSI hard disk drives.
SCSISelect Default Settings
The default AHA-2944UW settings shown in the follow-
ing table are appropriate for most SCSI devices. Run
SCSISelect only if you need to change a default setting,
format a disk, or verify a disk. (See the instructions on
page 8.) Otherwise, continue with Installing Device Driv-
ers on page 9.
1
Setting is valid only if Multiple LUN Support is enabled
2
Settings are valid only if host adapter BIOS is enabled.
3 If support for UltraSCSI is enabled, the maximum transfer rate is 40 MBytes/Sec.
Basic Host Adapter Settings
The basic host adapter settings are the SCSISelect settings
most likely to require any modification.
■
Host Adapter SCSI ID
— This option sets the host
adapter’s SCSI ID. The default setting is SCSI ID 7,
which give the host adapter the highest priority on
the SCSI bus (see Assigning SCSI ID Numbers on page
2). We recommend that you leave the host adapter set
to SCSI ID 7.
■
SCSI Parity Checking
—This option determines
whether the host adapter verifies the accuracy of data
transfer on the SCSI bus. The default setting is
Enabled. You should disable SCSI Parity Checking if
any SCSI device connected to the AHA-2944UW does
not support SCSI parity; otherwise, leave it enabled.
Most SCSI devices do support SCSI parity. If you are
not sure whether a device supports SCSI parity, con-
sult the documentation for the device.
■
Host Adapter SCSI Termination
—This option sets
termination on the host adapter. The default setting
for the AHA-2944UW is Automatic. We recommend
that you leave the AHA-2944UW set to its default set-
ting of Automatic. If you want to manually set the
termination setting, see Setting SCSI Termination on
page 2 for appropriate settings.
Boot Device Settings
The boot device settings allow you to specify the device
you wish to boot your computer from.
■
Boot Target ID
—This option specifies the SCSI ID of
the device you wish to boot from. The default setting
is SCSI ID 0. The SCSI ID selected here must corre-
spond to the ID configured on the boot device (see
Assigning SCSI ID Numbers on page 2).
■
Boot LUN Number
—If your boot device has multiple
LUNs (Logical Unit Numbers) and Multiple LUN
Support is enabled (see If the Send Start Unit Command
is set to yes for many devices, the boot time will vary
depending how long it takes each drive to start. on page
6), this option allows you to specify which LUN to
boot from on your boot device. The default settings is
LUN 0.
Basic Host Adapter
Default
Host Adapter SCSI ID
7
SCSI Parity Checking
Enabled
Host Adapter SCSI Termination Automatic
Boot Device Configuration
Default
Boot Target ID
0
Boot LUN Number
1
0
SCSI Device Configuration (0-15)
Default
Initiate Sync Negotiation
Yes (Enabled)
Maximum Sync Transfer Rate
3
20
MBytes/sec
Enable Disconnection
Yes (Enabled)
Initiate Wide Negotiation
Yes(Enabled)
Send Start Unit SCSI Command
2
No(Disabled)
Include in BIOS Scan
2
Yes (Enabled)
Advanced Host Adapter Configuration
Default
Reset SCSI Bus at IC Initialization
Enabled
Host Adapter BIOS
Enabled
Support Removable Disks Under BIOS as Fixed Disks
2
Boot only
Extended BIOS Translation for DOS Drives > 1 GByte
2
Enabled
Display <Ctrl-A> Message During BIOS Initialization
2
Enabled
Multiple LUN Support
2
Disabled
BIOS Support for Bootable CD-ROM
2
Enabled
BIOS Support for Int 13 Extensions
2
Enabled
Support for UltraSCSI Speed
3
Disabled
