HP StorageWorks XP Remote Web Console Software - Manual (Page 48)

Pair Status Description
SEQCHK The secondary storage system encountered a
non-time-stamped journal data for a URz pair
using the System timer type option. This status can
be displayed at the primary storage system and
secondary storage system, but the primary storage
system may not have the most current information.
Always use the pair status information displayed at
the secondary storage system for disaster recovery.
Hold The pair is prepared for delta resync operation.
When the status of primary data volume is Hold, the
write data for the TCz Synchronous R-VOL is stored in
the master journal volume.
Only the delta resync operation, releasing operation,
or changing pair option operation are allowed on
the pairs in Hold status.
Hlde An error occurred on the pair in Hold status. When
the status of primary data volume is Hlde, the write
data for the TCz Synchronous S-VOL will not be stored
in the master journal volume.
Only recovering pair status to standby (Hold)
operation, releasing operation, or changing pair
option operation are allowed on the pairs in Hlde
status.
Suspend Types
“ Suspend Types ” on page 48 lists and describes the URz suspend types, which indicate the reason for the
suspension. A URz pair can be suspended by the user at any time after the initial copy operation is
complete. The user must suspend a URz pair in order to perform ICKDSF maintenance on the primary
data volume or to access the secondary data volume (read only mode).
When a URz pair is suspended by the user, the primary storage system and secondary storage system
ensure synchronization by either completing or discarding any pending update copy operations
according to the user-specified drain/purge suspend option.
A URz pair is suspended by the primary storage system when the following suspension conditions
are detected. A URz pair can also be suspended by the secondary storage system (see
“ Suspension Condition ” on page 50).
• When the primary storage system detects that the user has released the volume pair from the
secondary storage system (e.g., to access an secondary data volume at the secondary site),
• When the primary storage system detects an error condition related to the secondary storage
system, secondary data volume, or a URz journal data operation,
• When the secondary storage system cannot execute DFW (DASD fast write) to the secondary
data volume (only if DFW required is selected), or
• When the primary storage system is unable to communicate with the secondary storage system.
For more information on URz journal data operations, see “ Suspension Condition ” on page 50.
When a URz pair is suspended, the primary storage system stops performing update copy operations
to the secondary data volume. Moreover, the primary storage system and secondary storage system
keep track of any journal data that were discarded during suspension, and the primary storage system
continues accepting write I/Os for the primary data volume and keeps track of the primary data volume
tracks which are updated while the pair is suspended.
A suspended URz secondary data volume has an additional status called the consistency status which is
displayed only at the secondary storage system. The consistency status of a suspended URz secondary
data volume indicates its update sequential consistency with respect to the other secondary data
volumes in the same group.
48 Overview of Universal Replicator Operations