Wide bus enabled, Quick arbitration and select (qas) capability, Setting bus speed at boot – IBM Ultra320 User Manual
Page 33: Problem determination, Wide, Enabled, Quick, Arbitration, Select, Qas)
2.
If
using
iprconfig
version
less
that
2.0.0,
select
Work
with
configuration
and
press
Enter.
3.
Select
Work
with
SCSI
bus
configuration
and
press
Enter.
4.
Select
your
adapter
from
the
list
by
pressing
1
then
press
Enter.
Note:
This
screen
content
varies
based
on
the
adapter
that
you
select.
Change
SCSI
Bus
Configuration
Current
Bus
configurations
are
shown.
To
change
setting
hit
"c"
for
options
menu.
Highlight
desired
option
then
hit
Enter
c=Change
Setting
Adapter
Location:
000:01:01.0
BUS
0
Maximum
Bus
Throughput
.
.
:
320
MB/s
320
MB/s
BUS
1
*160
MB/s
Wide
Enabled
.
.
.
.
.
.
.
:
Yes
80
MB/s
Maximum
Bus
Throughput
.
.
:
320
MB/s
40
MB/s
20
MB/s
10
MB/s
5
MB/s
Press
Enter
to
Continue
e=Exit
q=Cancel
5.
Select
Maximum
Bus
Throughput
field
under
the
desired
bus
and
press
c
.
6.
Select
the
desired
bus
speed:
5,
10,
20,
40,
80,
160,
or
320
MB/s,
and
press
Enter.
Note:
Depending
on
your
hardware,
some
of
these
options
may
not
be
available.
7.
Press
Enter
to
continue.
8.
Press
c
to
confirm
the
changes.
Wide
Bus
Enabled
If
you
are
attaching
an
external
device
with
an
8-bit
SCSI
interface
cable,
set
Wide
bus
enabled
to
no.
Follow
the
steps
in
Quick
Arbitration
and
Select
(QAS)
Capability
The
QAS
capability
is
automatically
controlled
by
the
adapter.
Setting
Bus
Speed
at
Boot
If
running
a
2.6
kernel,
a
module
parameter
is
provided
to
allow
for
setting
the
maximum
bus
speed
at
boot
time
before
the
iprinit
utility
runs.
Normally
this
should
not
be
needed,
but
if
you
are
having
difficulty
booting
due
to
running
at
160
MB/s,
bus
speed
can
be
lowered
to
80
MB/s
by
using
ipr.max_speed=0
on
the
kernel
command
line.
Problem
Determination
If
you
encounter
any
problems
with
the
adapter
after
the
installation,
refer
to
your
system
unit
documentation
for
information
about
running
diagnostics
or
other
problem-determination
procedures.
Refer
to
the
PCI-X
SCSI
RAID
Controller
Reference
Guide
for
Linux,
order
number
SA23-1327.
Chapter
7.
Installing
and
Setting
Up
Software
for
the
PCI-X
Dual
Channel
Ultra320
SCSI
RAID
Adapter
(Linux
)
21