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108 Chapter 2 Overview of CCI Operations
2.10.3 Pair Status Display and Configuration Confirmation
The CCI pairing function (configuration definition file) combines the physical volumes in the
storage system used independently by the servers. Therefore, you should make sure that the
servers’ volumes are combined as intended by the server system administrator.
The pairdisplay command displays the pairing status to enable you to verify the completion
of pair creation or pair resynchronization (see Figure 2.56). This command is also used to
conf
irm the configuration of the paired volume connection path (physical link of paired
volumes among the servers). For further information on the pairdisplay command, see
section 4.8.
--Link info. of c---- ----Link information of d-------------
Group PairVol(Local/Remote) P,T#,L#, Seq#, LDEV# P/S, Status, Fence, Seq#, Pair-LDEV#
G1 Oradb1(L) P1,T1,L1, Seq#, 20 P-VOL, Pair, Never, Seq#, 30
G1 Oradb1(R) P2,T2,L2, Seq#, 30 S-VOL, Pair, Never, Seq#, 20
G1,Oradb1... P1,T1,L1
G1...HOSTB
Primary
LDEV
#20
Secondary
LDEV
#30
Paired logical volumes
G1,Oradb1
P1, T1, L1 (Port, Target, LUN)
P2, T2, L2
HOSTA
G1,Oradb1... P2,T2,L2
G1...HOSTA
Special
file
HOSTB
Special
file
Configuration definition file
Configuration definition file
Hitachi RAID
Seq#
c
c
d
Fibre bus
Seq#
Hitachi RAID
Figure 2.56 Example of Pair Configuration Confirmation (Pairdisplay)
The raidscan command displays the SCSI port, target ID, LDEVs mapped to LUNs, and status
of those LDEVs, regardless of the configuration definition file (see Figure 2.57). When a port
number i
s specified, this command displays information about all target IDs and LUNs of that
port. For further information on the raidscan command, see section 4.11.1.
Port#, TargetID#, Lun# Number of LDEVs,LDEV#, P/S, Status, Fence, LDEV# Seq#, Pair-LDEV#
CL1-A 3 1 3(3,5,6) P-VOL, Pair, Never, 3 Seq#, 30
Figure 2.57 Example of Raidscan Command