Fujitsu ETERNUS AF Configuration Manual page 19

Chapter 7 Installing Drivers and Setting Up the Server
7.2 Setting Up the Server
For the single path connection example shown below, 10 LUNs are recognized on the single path, so the
command queue depth is set to "102".
Server
FC Port
10 LUNs recognized
on this path
For connection schemes in which an ETERNUS AF/DX FC port is shared by multiple servers, the command
queue depth is again determined by the number of LUNs recognized by each server on the single path. In
this example, "51" is set as the command queue depth for server A and "42" for server B.
Server A
FC Port
10 LUNs recognized
on this path
Server B
FC Port
12 LUNs recognized
on this path
For multipath connection, the command queue depth is determined similarly.
For the multipath connection example shown below, 20 LUNs are recognized on each path, so the command
queue depth is set to "51". For all types of multipath, the command queue depth is always decided by the
number of LUNs recognized on each individual path.
Server
FC Port
FC Port
20 LUNs recognized
on this path
FUJITSU Storage ETERNUS AF, ETERNUS DX Configuration Guide -Server Connection- (Fibre Channel) for HP-UX
ETERNUS AF/DX
FC Port
Number of
LUNs: 10
ETERNUS AF/DX
FC Port
Number of
LUNs: 10
Affinity Group A
Number of
LUNs: 12
Affinity Group B
20 LUNs recognized
on this path
ETERNUS AF/DX
FC Port
Number of
FC Port
LUNs: 20
19
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Affinity Group
Affinity Group
P3AM-3772-22ENZ0