Hitachi G200 - Switching Operations to the Secondary Site

updates is performed after the application has been started at the remote
site.
You should prepare for file and database recovery using files for file recovery
(for example, database log files that have been verified as current).
Switching operations to the secondary site
If a disaster or failure occurs at the primary (local) site, the first disaster
recovery activity is to switch your operations to the secondary (remote) site.
S-VOLs are recovered individually based on the pair status and P-VOL fence
level information for each pair.
You can switch operations to the secondary site either by deleting pairs and
then re-establishing them when recovery is completed, or by not deleting
pairs. Both methods are presented below.
To switch operations to the secondary site by deleting pairs
1. Record the pair status and fence level of each S-VOL.
2. Analyze the consistency of the S-VOLs, based on pair status and P-VOL
fence level setting. See
Checking S-VOL consistency with the P-VOL on
page 9-4.
3. Perform file recovery as needed.
4. Split all pairs from the S-VOLs using one of the following commands:
¢
CCI pairsplit
¢
BCM YKSUSPND
¢
PPRC CSUSPEND
5. Release all pairs using one of the following commands:
¢
CCI pairsplit -S
¢
BCM YKRECOVER
¢
PPRC CRECOVER
If you are not using these tools, connect to each secondary system with
Device Manager - Storage Navigator to split and release the pairs.
Note: When the S-VOL is no longer paired, it cannot be distinguished it
from a non-TrueCopy volume. Use the appropriate means to change the
S-VOL volume labels.
6. Complete file recovery procedures.
7. Vary the S-VOLs online.
8. At the secondary site, start critical host operations, with the previous S-
VOLs now the P-VOLs.
To switch operations to the secondary site by not deleting pairs
1. Record the pair status and fence level of each S-VOL.
Disaster recovery
9-3
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models