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326 Chapter 4 Performing CCI Operations
4.21.2.2 Dual Hosts
In the following example, the paircreate command is unable to operate the paired volume
because the volume described on HostB is different than the SLPR of the command device.
Also, the raidscan -p CL3-A command (via both Hosts), will be unable to scan a port because
the specified port is different than the SLPR of the command device.
SLPR0 SLPR# M SLPR# N
HostB
HostA
RM
INST0
RM
INST1
CM
PVOL
SVOL
CL1-A
CL3-A
Figure 4.84 SLPR Configuration on Dual Hosts
To operate SLPR#N, assign the command device. If HostB has a command device for
SLPR#N, the paircreate command will be permitted. However, the raidscan -p CL3-A
command via HostA will be unable to scan a port because the specified port is different than
the SLPR of the command device. In this case, raidscan -p CL3-A command must be
operated via HostB.
SLPR0 SLPR# M SLPR# N
CM
PVOL SVOL
CL1-A
CL3-A
CM
HostB
HostA
RM
INST0
RM
INST1
Figure 4.85 Operation Across SLPRs Using two Command Devices on Dual Hosts