Data Recovery For Psue Using Shadowimage; Recovering The Pair - Hitachi AMS 2000 Reference Manual

Data recovery for PSUE using ShadowImage

When a pair was suspended (PSUE) due to a failure in the array, collect the
CCI system log files and call the Hitachi maintenance personnel (see
splitting guidelines, on page
Maintenance personnel will remove the source of error in the array. After
the source of the error has been removed, the system administrator must
recover the pair using the CCI commands.

Recovering the pair

Make sure that the system administrator has verified that the PSUE
occurred while resynchronizing from S-VOL to P-VOL (pairresync –restore).
Table 2-11
•
Table 2-11: Data Assurance and Recovery Methods
State before
PSUE
Other than RCPY
RCPY
Hitachi AMS 2000 Family Command Control Interface (CCI) Reference Guide
2-32).
shows data assurance and the method for recovering the pair.
Data Assurance
P-VOL: Assured Resynchronize (pairresync) in the direction of P-VOL
S-VOL: Not to S-VOL. Note that the pair may have been split due
assured to the drive's double-malfunction in either or both
volumes. In such case, confirm that the data exists in
the P-VOL, and then create a pair (paircreate).
P-VOL: Not Split the pair (pairsplit -S), restore the backup data
assured to P-VOL, and then create a pair (paircreate). Note
S-VOL: Not that the pair may have been split due to the drive's
assured double-malfunction in either or both volumes. In such
case, confirm that the backup data restoration has
been completed to the P-VOL, and then create a pair.
Troubleshooting
Action to be taken after PSUE
Pair-
2–31