Prerequisites for creating SI pairs
The following are prerequisites for creating SI pairs:
The P-VOL and S-VOL are unpaired.
If the P-VOL is already paired with other S-VOLs ("PAIR" status), you have determined that the status of existing S-VOLs is the status that is required to create the new pair.
For more information about S-VOL status, see Unaffected S-VOL status and pair user tasks.
If you are concerned with host server I/O performance, make sure that the I/O load is light.
For more information about checking I/O performance-related information, see the Hitachi Command Suite User Guide.