Fibre
Channel
topology.
The
table
below
lists
the
default
Loop
IDs
and
AL_PAs
for
each
drive
in
the
library.
Table
2-2.
Default
Loop
IDs
and
their
associated
AL_PAs
for
Ultrium
Tape
Drives
in
the
library
Module
Drive
Position
Drive
Location
Coordinate
Default
Loop
ID
Default
AL_PA
Control
Module
1
0,
1
0
X’EF’
2
0,
2
1
X’E8’
9U
Expansion
Module
3
-1,
1
2
X’E4’
4
-1,
2
3
X’E2’
5
-1,
3
4
X’E1’
6
-1,
4
5
X’E0’
Note:
Loop
IDs
are
given
in
decimal
format
and
AL_PA
values
are
given
in
hexadecimal
format.
You
can
change
a
Loop
ID
by
using
the
library’s
operator
panel
or
Web
User
Interface.
Using
a
method
called
hard
addressing,
the
drive
then
automatically
selects
the
corresponding
AL_PA,
which
is
the
identifier
that
devices
use
to
communicate.
Valid
Loop
ID
values
range
between
0
and
125.
The
higher
the
number
of
the
Loop
ID
(and
AL_PA),
the
lower
the
priority
of
the
device
in
the
loop.
You
can
also
specify
Loop
IDs
that
allow
the
drive
to
dynamically
arbitrate
the
AL_PA
with
other
Fibre
Channel
devices
on
the
loop.
This
method
avoids
conflicts
over
the
address
and
is
called
soft
addressing.
To
dynamically
arbitrate
the
AL_PA,
specify
a
Loop
ID
of
126
or
127.
For
a
complete
list
of
Loop
IDs
and
their
corresponding
AL_PAs,
see
the
table
below.
Table
2-3.
Valid
Loop
IDs
and
their
associated
AL_PAs
for
Ultrium
Tape
Drives
in
the
library
7-bit
Loop
ID
(decimal)
8-bit
AL_PA
(hexadecimal)
7-bit
Loop
ID
(decimal)
8-bit
AL_PA
(hexadecimal)
7-bit
Loop
ID
(decimal)
8-bit
AL_PA
(hexadecimal)
0
X’EF’
43
X’A3’
86
X’4D’
1
X’E8’
44
X’9F’
87
X’4C’
2
X’E4’
45
X’9E’
88
X’4B’
3
X’E2’
46
X’9D’
89
X’4A’
4
X’E1’
47
X’9B’
90
X’49’
5
X’E0’
48
X’98’
91
X’47’
6
X’DC’
49
X’97’
92
X’46’
7
X’DA’
50
X’90’
93
X’45’
8
X’D9’
51
X’8F’
94
X’43’
9
X’D6’
52
X’88’
95
X’3C’
10
X’D5’
53
X’84’
96
X’3A’
11
X’D4’
54
X’82’
97
X’39’
12
X’D3’
55
X’81’
98
X’36’
13
X’D2’
56
X’80’
99
X’35’
Chapter
2.
Installation
Planning
2-5
Summary of Contents for System Storage TS3310
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