HP StorageWorks XP Remote Web Console Software - Manual (Page 152)

Analyzing the Currency of XP Continuous Access Synchronous S-VOLs
Table 32 (page 152) shows how to determine the currency of an XP Continuous Access Synchronous
S-VOL based on its pair status and P-VOL fence level setting. For XP Continuous Access Synchronous
pairs with a P-VOL fence level setting of Never, further analysis is required to determine the currency
of these S-VOLs. The currency of these S-VOLs can be determined by using the sense information
transferred via the host failover, or by comparing the contents of the S-VOL with other files that are
confirmed to be current (for example, database log files). These S-VOLs should be recovered using
the files that are confirmed to be current.
Actual data recovery must be done using recovery point data in the database redo log.
Table 32 Analyzing the Currency of XP Continuous Access Synchronous S-VOLs
Currency of S-VOL Fence Level Type Status of S-VOL
Inconsistent. This S-VOL does not belong to an XP Continuous Access
pair.
NOTE: Even if you established an XP Continuous Access pair for
this volume, you must regard this volume as inconsistent.
Data
Status
Never
- - SMPL
Inconsistent. This S-VOL is not synchronized because not all tracks
have been copied from the P-VOL yet. This S-VOL must be initialized
(or copied from the P-VOL at a later time). Data
Status
Never
- - COPY
Current. This S-VOL is synchronized with its P-VOL. Data
Status
- - PAIR
Needs to be analyzed. This S-VOL requires further analysis to
determine its level of currency. Never
Inconsistent. This S-VOL is not synchronized because not all tracks
have been copied from the P-VOL yet. This S-VOL must be initialized
(or copied from the P-VOL at a later time). Data
Status
Never
initial copy
failed PSUE
Suspect. This S-VOL is not synchronized with its P-VOL if any write
I/Os were issued to the P-VOL after the pair was split. This pair
should be released and restarted using the Entire Volume for Initial
Copy option, but the None can be used for Initial Copy option if
you are sure that no data on the P-VOL changed. Data
Status
Never
S-VOL by
operator PSUS
Current. This S-VOL is synchronized with its P-VOL. Data all other types PSUS or PSUE
Suspect. This S-VOL is not synchronized with its P-VOL if any write
I/Os were issued to the P-VOL after the pair was split or suspended.
Restore the consistency of this S-VOL and update it, if required. The
time of suspension indicated on the Last Updated field of the
Detailed Information dialog box (MCU SVP time) will help to
determine the last time this S-VOL was updated. Status
Never
Analyzing the Consistency of XP Continuous Access Asynchronous S-VOLs
Table 33 (page 153) describes how to determine the consistency of an XP Continuous Access
Asynchronous S-VOL based on its pair status and consistency status. For XP Continuous Access
Asynchronous S-VOLs with a consistency status of LU, the volume is not consistent with other volumes
in the same group. Further analysis is required to determine the currency of each of these S-VOLs.
The currency of these S-VOLs can be determined by using the sense information transferred via
host failover software or by comparing the contents of the S-VOL with other files that are confirmed
to be current (for example, database log files). These S-VOLs should be recovered using the files
which are confirmed to be current.
Actual data recovery must be done using recovery point data in the database redo log.
152 Usage Scenarios