Wide bus enabled, Quick arbitration and select (qas) capability, Problem determination – IBM Ultra320 User Manual
Page 23: Wide, Enabled, Quick, Arbitration, Select, Qas), Capability
Change
/
Show
Characteristics
of
a
PCI-X
SCSI
RAID
Controller
Bus
[Entry
Fields]
SCSI
Adapter
scsi5
Description
PCI-X
U320
SCSI
RAID>
Status
Available
Location
14-08-00
Adapter
card
SCSI
ID
[7]
Wide
bus
enabled
yes
Maximum
SCSI
Bus
Speed
in
MB/s
320
QAS
(Quick
Arbitration)
Capability
Enable
Apply
changes
to
DATABASE
only
no
6.
Select
Maximum
SCSI
Bus
Speed
in
MB/s.
7.
Press
F4.
8.
Select
the
desired
bus
speed:
5,
10,
20,
40,
80,
160,
or
320
MB/s,
and
press
Enter.
9.
Press
Enter
again.
10.
If
the
change
was
successful,
press
F10
to
exit
SMIT.
If
you
were
not
successful
in
using
the
procedure
do
the
following:
1.
Select
Apply
change
to
DATABASE
only.
2.
Press
F4
and
select
yes.
3.
Press
Enter.
4.
Press
F10
to
exit
SMIT.
5.
At
this
point,
the
adapter
and
its
child
devices
must
be
reconfigured.
To
reboot
your
system,
log
in
as
root
user
and
type
shutdown
-Fr
at
the
command
prompt.
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.
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.
AIX
users
should
refer
to
the
PCI-X
SCSI
RAID
Controller
Reference
Guide
for
AIX,
order
number
SA23-1323.
Chapter
5.
Setting
Up
the
PCI-X
Dual
Channel
Ultra320
SCSI
RAID
Adapter
(AIX)
11