IBM System Storage TS3500, Introduction And Planning Manual

Page: 228 / 290

Table 64. Default Loop IDs and their associated AL_PAs for drives with single or dual ports (continued) . For drives
with single ports, use the values for Port 1; for drives with dual ports, use Ports 1 and 2.
Drive
Frames 1, 7, 13 Frames 2, 8, 14 Frames 3, 9, 15 Frames 4, 10, 16 Frames 5, 11 Frames 6, 12
Loop
ID
AL_PA
Loop
ID
AL_PA
Loop
ID
AL_PA
Loop
ID
AL_PA
Loop
ID
AL_PA
Loop
ID
AL_PA
Row 5
Port 1 21 X'C7' 37 X'AB' 53 X'84' 69 X'6B' 85 X'4E' 101 X'33'
Port 2 85 X'4E' 101 X'33' 22 X'C6' 38 X'AA' 21 X'C7' 37 X'AB'
Row 6
Port 1 22 X'C6' 38 X'AA' 54 X'82' 70 X'6A' 86 X'4D' 102 X'32'
Port 2 86 X'4D' 102 X'32' 23 X'C5' 39 X'A9' 22 X'C6' 38 X'AA'
Row 7
Port 1 23 X'C5' 39 X'A9' 55 X'81' 71 X'69' 87 X'4C' 103 X'31'
Port 2 87 X'4C' 103 X'31' 24 X'C3' 40 X'A7' 23 X'C5' 39 X'A9'
Row 8
Port 1 24 X'C3' 40 X'A7' 56 X'80' 72 X'67' 88 X'4B' 104 X'2E'
Port 2 88 X'4B' 104 X'2E' 25 X'BC' 41 X'A6' 24 X'C3' 40 X'A7'
Row 9
Port 1 25 X'BC' 41 X'A6' 57 X'7C' 73 X'66' 89 X'4A' 105 X'2D'
Port 2 89 X'4A' 105 X'2D' 26 X'BA' 42 X'A5' 25 X'BC' 41 X'A6'
Row 10
Port 1 26 X'BA' 42 X'A5' 58 X'7A' 74 X'65' 90 X'49' 106 X'2C'
Port 2 90 X'49' 106 X'2C' 27 X'B9' 43 X'A3' 26 X'BA' 42 X'A5'
Row 11
Port 1 27 X'B9' 43 X'A3' 59 X'79' 75 X'63' 91 X'47' 107 X'2B'
Port 2 91 X'47' 107 X'2B' 28 X'B6' 44 X'9F' 27 X'B9' 43 X'A3'
Row 12
Port 1 28 X'B6' 44 X'9F' 60 X'76' 76 X'5C' 92 X'46' 108 X'2A'
Port 2 92 X'46' 108 X'2A' 29 X'B5' 45 X'9E' 28 X'B6' 44 X'9F'
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 Tape Library
Specialist Web interface (refer to the section about changing the Loop ID in the
IBM System Storage TS3500 Tape Library with ALMS Operator Guide . 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 (which
relates to AL_PA), the higher 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 Table 65 on
page 205.
204
IBM System Storage TS3500 Tape Library with ALMS: Introduction and Planning Guide