HP StorageWorks P2000 Firmware Release Notes page 7

Issue: When using explicit LUN mapping, using long IQN names for the iSCSI Initiator can cause the array
to map the LUN incorrectly. A predefined area is used to store explicit LUN mapping information per LUN
and, with longer IQN names, this area can be exhausted. This issue is not dependent on the number of paths
to the LUN.
Workaround: Shorten the IQN name on the nodes.
The following formula is used to calculate the maximum IQN name length based on the number of hosts being
explicitly mapped to a LUN on the array:
Maximum IQN Character Length = (4083 / n) – 7 (Where n = number of hosts nodes explicitly
mapped to a LUN on the array.)
NOTE: By specification, 223 is the maximum IQN length allowed.
The following table provides the calculated values based on the number of hosts being explicitly mapped to
a LUN on the array:
Number of hosts explicitly
mapped to a LUN and the
Maximum IQN character
length
1–17 223
18 219
19 207
20 197
21 187
22 178
23 170
24 163
25 156
26 150
27 144
28 138
29 133
30 129
31 124
32 120
HP StorageWorks P2000 G3 iSCSI MSA System Controller Firmware Release Notes
Number of hosts explicitly
mapped to a LUN and the
Maximum IQN character
length
33 116
34 113
35 109
36 106
37 103
38 100
39 97
40 95
41 92
42 90
43 87
44 85
45 83
46 81
47 79
48 78
Number of hosts explicitly
mapped to a LUN and the
Maximum IQN character
length
49 76
50 74
51 73
52 71
53 70
54 68
55 67
56 65
57 64
58 63
59 62
60 61
61 59
62 58
63 57
64 56
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