Chapter 1. overview, Chapter, Overview – IBM Ultra320 User Manual
Page 13
Chapter
1.
Overview
The
PCI-X
Dual
Channel
Ultra320
SCSI
RAID
Adapter
is
a
133
MHz
64-bit
PCI-X
adapter.
It
allows
you
to
connect
SCSI
hard
disk
drives
in
RAID
0,
5
and
10
configurations
to
system
units
with
a
Peripheral
Component
Interconnect
(PCI)
bus.
RAID
(Redundant
Array
of
Independent
Disks)
provides
a
way
to
distribute
stored
data
among
two
or
more
hard
disk
drives
inside
or
attached
to
a
host
system.
This
adapter
supports
non-RAID
disks
formatted
to
512
bytes/sector,
RAID
disks
formatted
to
522
bytes/sector,
and
other
devices
including
tape
and
optical
devices.
Note:
This
guide
refers
to
various
hardware
and
software
features
and
functions.
The
support
for
these
features
and
functions
depends
upon
the
limitations
of
your
hardware
and
software.
AIX
and
Linux
support
all
functions
mentioned.
If
you
are
using
another
operating
system,
consult
the
appropriate
documentation
for
that
operating
system
regarding
support
for
the
mentioned
features
and
functions.
This
guide
also
uses
the
terms
channel
and
bus
interchangeably.
The
PCI-X
Dual
Channel
Ultra320
SCSI
RAID
Adapter
has
two
channels,
0
and
1.
Each
channel
has
both
an
internal
and
an
external
connector.
Only
one
internal
or
external
connector
can
be
used
on
each
channel.
1
Channel
1
external,
68-position,
VHDCI
(very
high
density
cable
interconnect)
2
Channel
0
external,
68-position,
VHDCI
(very
high
density
cable
interconnect)
3
Channel
0
internal,
68-position,
high-density
plastic
D-shell
SCSI
standard
connector
for
16-bit
attachment
4
Channel
1
internal,
68-position,
high-density
plastic
D-shell
SCSI
standard
connector
for
16-bit
attachment
5
Adapter
Handle
You
can
create,
control,
and
manage
a
RAID
configuration
in
combination
with
supporting
host
software.
For
more
RAID
information,
refer
to
the
PCI-X
SCSI
RAID
Controller
Reference
Guide
for
AIX,
order
number
SA23-1323,
or
PCI-X
SCSI
RAID
Controller
Reference
Guide
for
Linux,
order
number
SA23-1327.
The
PCI-X
Dual
Channel
Ultra320
SCSI
RAID
Adapter
supports
SCSI
synchronous
data
rates
from
20
MB/s
(16-bit)
up
to
320
MB/s
(16-bit)
on
two
independent
SCSI-2
channels.
Figure
1.
PCI-X
Dual
Channel
Ultra320
SCSI
RAID
Adapter
1