Analyzing Currency Of Continuous Access Xp Synchronous S-Vols; Analyzing Consistency Of Continuous Access Xp Asynchronous S-Vols; Determining Continuous Access Xp Synchronous S-Vol Currency Based On Its Pair Status And P-Vol Fence-Lev - HP xp12000 User Manual

CAUTION:
Access XP simplex volume. The Continuous Access XP Async C/T is also discarded when the pair is
deleted.
5. If necessary, use the logical volume manager to change volume labels of S-VOLs.
6. Ensure that all required file recovery procedures are complete before varying S-VOLs online.
7. At this point, start critical applications at the remote site with previous S-VOLs taking the place of their
P-VOLs.

Analyzing currency of Continuous Access XP Synchronous S-VOLs

Table 28 shows how to determine currency of a Continuous Access XP Synchronous S-VOL based on its
pair status and P-VOL fence-level setting. For Continuous Access XP Sync pairs with a P-VOL fence-level
setting of Never, further analysis is required to determine currency of these S-VOLs. Determine currency of
these S-VOLs using the sense information transferred via the host failover, or by comparing the contents of
the S-VOL with other files confirmed to be current (such as database log files). These S-VOLs should be
recovered using files confirmed to be current.
NOTE: Actual data recovery must be done using recovery point data in the database redo log.
Table 28 Determining Continuous Access XP Synchronous S-VOL currency based on its pair status and
P-VOL fence-level setting
Status of S-VOL
SMPL
COPY
PAIR
PSUE -
initial copy failed
PSUS -
S-VOL by operator
PSUS/PSUE -
all other types

Analyzing consistency of Continuous Access XP Asynchronous S-VOLs

Table 29 shows how to determine the consistency of a Continuous Access XP Async S-VOL based on its
pair status and consistency status. For Continuous Access XP Async S-VOLs with a consistency status of LU,
the volume is not consistent with other volumes in the same group, and further analysis is required to
determine the currency of each of these S-VOLs. Determine currency of these S-VOLs using the sense
112 Continuous Access XP for the XP12000/XP10000
After an S-VOL changes to simplex, you cannot distinguish it from a non-Continuous
Fence level Currency of S-VOL
Data Inconsistent. This S-VOL does not belong to a Continuous Access XP volume
Status pair.
Never
Even if you established a Continuous Access XP pair for this volume, you must
regard this volume as inconsistent.
Data Inconsistent. This S-VOL is not synchronized because not all cylinders have
Status been copied from the P-VOL yet. This S-VOL must be initialized (or copied
Never from the P-VOL at a later time).
Data Current. This S-VOL is synchronized with its P-VOL.
Status
Never Needs to be analyzed. This S-VOL requires further analysis to determine its
level of currency.
Data Inconsistent. This S-VOL is not synchronized because not all cylinders have
Status been copied from the P-VOL yet. This S-VOL must be initialized (or copied
Never from the P-VOL at a later time).
Data Suspect. This S-VOL is not synchronized with its P-VOL if any write I/Os were
Status issued to the P-VOL after the pair was split. This pair should be restarted
Never using the Entire Volume initial copy option, but the None option can be used
if you are sure no data on the P-VOL changed.
Data Current. This S-VOL is synchronized with its P-VOL.
Status Suspect. This S-VOL is not synchronized with its P-VOL if any write I/Os were
Never issued to the P-VOL after the pair was split or suspended. Restore consistency
of this S-VOL and update it, if required. The time of suspension indicated on
the Pairdisplay pane helps determine the last time this S-VOL was updated.