HP StorageWorks XP24000 Continuous Access Software User and Reference Guide, v01 (T5278-96002, June 2007)

volume. For details on external volumes, see the HP Storag eWorks XP24000 External Storage
Software User’s Guide.
• S-VOL: Allows you to select the S-VOL(s) for the new pair(s). If you selected more than one
P-VOL, select the S-VOL for the P-VOL being displayed. The S-VOLs for the rest of the P-VOLs
are automatically assigned a ccording to the LUN. For example, if you select three P-VOLs and
select LUN001 as the S-VOL for the first P-VOL, the S-VOLs for the two other P-VOLs will be
LUN002 and LUN003.
Note: When creating more than one pair a t a time, make sure that the S-VOLs to be assigned
automatically are available. If an S-VOL is not available, you will have to select the S-VOL
individually.
Note: You can select the port number from the drop-down list, or enter it directly. When you enter
the
port number d irectly, you can specify it with two characters, for example, 1A for CL1-A.You
can
also enter the port number in both lowercase and uppercase characters.
• RCU: Select the RCU for the Continuous Access pair(s) being created. The RCUs which have been
added
to the current MCU are displayed. In the drop-down list, the serial number, LDKC number,
Controller ID, model name, Path Group ID, and path type are displayed for CU Free. O n the other
hand, the serial number, LDKC number, CU number, SSID, and path type are displayed for a CU
other
than CU Free. The RCU must be the same for all pairs being created during one operation.
• P-VOL Fence Level (sync only): Select the fence level for the new pair(s) (default = Never). The
fence level determines the conditions under which the MCU will reject write operations to the
P-VOL. See “Pair Options” on pa ge 110 for further information on this option.
• Never: The P-VOL will never be fenced.
• Data: The P-VOL will be fenced when the MCU cannot successfully execute an update copy
operation for any reason.
• Status: The P-VOL will be fenced only if the MCU is not able to change the S-VOL status to
suspended when an update copy o peration fails.
• Initial Copy Parameters: Select the initial copy options for the new pair(s) . See
“Initial Copy Options” on page 109 for further information on the initial copy options.
Note:
These options cannot be changed after a pair has been added.
• Initial C opy: Entire Volume = copy all P-VOL data to the S-VOL; None =do not copy any
P-VOL data to the S-VOL. The default setting is Entire Volume.
WA RN ING: The user must ensure tha t the P-VOL and S-VOL are already identical when using
the
None setting.
• Copy Pace: Desired number of tracks to be copied at one time (1-15) during the initial c opy
operation. The default setting is 15.
• Priority: Priority (scheduling order) of the initial copy operations (1-256). The default setting
is 32.
Note: If the time out error occurs during the Paircrea te operation, the copy operation may not be
executed correctly in the order that you have set with the Priority parameter. The time out error
maybecaused bythe CU config uration or a remote copy path error. Review the error, release
the pair
with the error, and then retry the Paircreate operation.
• Difference Manag ement: Select Auto, Cylinder,or Track as the basis for managing the differential
data. The default setting is Auto.When you select Auto,either Cylinder or Track is selected
depending on the basic size of the logical unit (LU). See “Difference Management”onpage20
for further information on this option.
Note: This option cannot be changed after a pair has
been
added.
• Asynchronous Parameters (async only):
• CT Group: Consistency group for the new pair(s). Consistency groups which have already
been
added to the current MCU are displayed.
Note: This option cannot be changed after a pair has been added.
Note: Only Continuous Access Asynchronous pairs that belong to the same CLPR ca n
be
allocated to one consistency group. For further information on CLPRs, see the HP
StorageWorks XP24000 Disk/Cache Partition User’s Guide.
• Error Level: Error level for the new pair(s): Group,or LU (default = G roup). See
“Pair Options” on page 11 0 for further information on the error level option.
To create one or more new Continuous Access pairs:
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