Appendix, Connecting, Scsi – IBM Ultra320 User Manual
Page 47: Hard, Disk, Drives, Adapter
Appendix
C.
Connecting
SCSI
Hard
Disk
Drives
to
the
Adapter
The
RAID
adapter
connects
to
a
hard
disk
drive
through
one
of
two
possible
SCSI
channels.
The
connected
hard
disk
drives
can
be
inside
the
host
system
unit,
outside
the
system
unit
in
a
hard
disk
drive
enclosure,
or
both.
Each
hard
disk
drive
on
a
SCSI
channel
must
have
a
unique
SCSI
ID
of
0
through
6,
8,
9,
A,
B,
C,
D,
E,
or
F.
The
addressing
scheme
is
in
hex
notation.
Address
7
is
reserved
for
the
adapter
and
is
not
to
be
used
for
another
SCSI
hard
disk
drive.
Each
of
the
SCSI
channels
(0
and
1)
is
assigned
a
channel
ID.
The
channel
ID
and
SCSI
ID
are
used
to
fully
identify
a
hard
disk
drive
connected
to
the
adapter.
For
optimum
overall
performance
and
data
protection,
distribute
hard
disk
drives
evenly
across
the
two
available
channels.
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
Figure
2.
PCI-X
Dual
Channel
Ultra320
SCSI
RAID
Adapter
35