Hitachi MP-96RD625-01 manual URz Data Volume Pair Status, Pair Status Description

Table 2-4 URz Data Volume Pair Status

Pair Status

Description

Simplex		This volume is not currently assigned to a URz data volume pair. This volume
		does not belong in the journal group. When this volume is added to a URz data
		volume pair, its status will change to pending duplex.
Pending Duplex		The initial copy operation for this pair is in progress. This data volume pair is not
		yet synchronized. When the initial copy is complete, the status changes to
		duplex.
Duplex		This data volume pair is synchronized. Updates to the primary data volume are
		duplicated on the secondary data volume.
Suspended		This data volume pair is not synchronized.
(see Table 2-5 for		– When the primary storage system detects a URz suspension condition (see
suspend types)		section Suspension Condition), the primary storage system changes the primary
		data volume status and secondary data volume status (if possible) to
		suspended.
		– When the secondary storage system detects a URz suspension condition (see
		section Suspension Condition), the secondary storage system changes the
		secondary data volume status to suspended.
		– When you suspend a pair from the primary storage system, the primary storage
		system changes the status of the primary data volume and secondary data
		volume (if possible) to suspended. When you suspend a pair from the
		secondary storage system, the secondary storage system changes the status of
		the secondary data volume to suspended.
		– When the primary storage system detects that the pair was suspended or
		released from the secondary storage system, the primary storage system
		changes the status of the primary data volume to suspended.
Suspending		This pair is not synchronized. This pair is in transition from duplex or pending
		duplex to suspended. When the suspension is requested (by user, primary
		storage system, or secondary storage system), the status of all affected pairs
		changes to suspending. When the suspension is complete, the status changes to
		suspended.
Deleting		This pair is not synchronized. This pair is in transition from duplex, pending
(releasing)		duplex, or suspended to simplex. When the delete pair operation is requested
		(by user), the status of all affected pairs changes to deleting (releasing). When
		the delete pair operation is complete, the status changes to simplex.
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.
	Chapter 2 About Universal Replicator Operations		2-35

Hitachi Universal Replicator for IBM /OS User’s Guide