HP XP P9500 Storage - Manual (Page 135)

This dialog box lets you create a pair. See “Create pairs” (page 55) for complete information.
Description Item
Shows the M-VOL LDKC number, CU number, LDEV number, and CLPR number and name. M-VOL
Where the R-VOL is defined: device ID. R-VOL
Where the remote system is defined.
•
The serial number, LDKC number, the CU number, SSID, path type.
RCU
Where the option is defined for rejecting write operations to the M-VOL. M-VOL Fence Level
Where whether to copy the M-VOL during the initial copy is defined. Initial Copy
Where maximum number of tracks to be copied is defined: 3 or 15. Copy Pace
Where the order is defined for the current pair to be created. Options are from 1 to 256. Priority
For the details of the scheduling order of the initial copy for which the Priority is set, see
“Priority set for initial copy operations and scheduling order” (page 33) .
Where the method is defined for managing differential data. Options are Auto, Cylinder,
Track. Difference Management
Specifies whether the CFW data will be copied to the R-VOL. CFW Data
Specifies whether the main system will suspend the pair if the remote system cannot execute
DFW (DASD fast write) to the R-VOL. DFW to R-VOL
• DFW required indicates that the pair will be suspended when DFW data to the R-VOL is
blocked.
•
DFW not required indicates that the pair will not be suspended when DFW data to the
R-VOL is blocked.
The interaction of the DFW required setting and the M-VOL fence level setting can cause a
host application to fail with a permanent I/O error when attempting to update an M-VOL.
Keep track of which pairs have the DFW required setting, and make sure that DFW to the
R-VOL is not blocked.
If a Continuous Access Synchronous Z pair is established using PPRC commands, the DFW
to R-VOL option is set to the DFW not required setting.
Specifies whether or not the host I/O timestamp is transferred from M VOL to R VOL. Time Stamp
Suspend Pair dialog box
Suspend Pair dialog box 135