HP XP P9500 Storage - Manual (Page 37)

Table 11 System option modes (continued)
Description Mode
Mode 448 OFF: If the SVP detects a blocked path and the path does not recover within
the specified period of time, the SVP assumes that an error occurred, and then splits
(suspends) the mirror.
NOTE: The mode 448 setting is available only when mode 449 is set to OFF.
Mode 449 ON: The SVP does not detect blocked paths. 449
Mode 449 OFF: The SVP detects blocked paths and monitors the time until the mirrors
get split (suspended).
Allows you to perform the initial copy operation of the Continuous Access Journal Z
pair for the suspended Continuous Access Journal Z pair. 474
Use the script file in which the following operations are described:
Initial copy operation of the Continuous Access Journal Z pair (None) -> Suspend the
Continuous Access Journal Z pair -> Initial copy operation of the Continuous Access
Journal Z pair -> Delete the Continuous Access Journal Z pair -> Resynchronize the
Continuous Access Journal Z pair.
The performance of the initial copy processing of the Continuous Access Journal Z pair
can be improved by issuing the command from Business Continuity Manager.
Mode 474 ON: The performance of the initial copy processing of the Continuous Access
Journal Z pair can be improved by issuing the command from Business Continuity
Manager.
Mode 474 OFF: Normal operations are performed.
If both volumes of pair are THP V-VOLs, pages allocated to P-VOL are copied to S-VOL
by the initial copy operation. However, areas where pages are not allocated to P-VOL
are not copied to S-VOL by the initial copy operation. Therefore, if the amount of pages
allocated to P-VOL is few, the performance of the initial copy processing might not be
improved even if Mode 474 is set to ON.
To create a Continuous Access Journal Z pair for delta resync operation in the 3DC
multitarget configuration, set this mode to ON. 506
Mode 506 ON: The delta resync operation is performed if there are no update I/Os.
Mode 506 OFF: The copy processing of all data is performed if there is no update
I/Os.
When creating a Continuous Access Journal Z pair for delta resync operation in the
3DC multitarget configuration, and if you want to control the ratio of the usage rate of
difference journal data in the journal volume in the primary site, set this mode to ON. 511
Mode 511 ON: The upper limit of the usage rate of the journal data in the journal
volume is 40%.
Mode 511 OFF: The upper limit of the usage rate of the journal data in the journal
volume is 70%.
To change the displayed consistency time (C/T) when the Continuous Access Journal
Z pair status is Duplex, set this mode to ON. 530
Mode 530 ON: The copy completion time from the master journal volume to the restore
journal volume of the journal data is displayed in C/T.
Mode 530 OFF: The completion time when the journal data is restored to the data
volume is displayed in C/T.
In the configuration where multiple MCUs share an RCU (Continuous Access Journal Z
Mx1 configuration), the mirror resynchronization or delta resync operation may fail 593
due to SSB=EB9D. SSB=EB9D is output as SSB log when the parameter of the
communication command is not saved in the shared memory. To reduce the number of
multiprocessing of the communication command issued from MCU to RCU for the status
transition of each pair, set this mode to ON. By setting this mode to ON, you can
prevent mirror resynchronization or delta resync operation from failing.
Guidelines for preparing systems for Continuous Access Journal Z 37