Hitachi MP-96RD625-01 Suspend Types, Consistency Status for Suspended URz Secondary Data, Volumes

Table 2-5	Suspend Types
Suspend Type	Applies to	Description
Secondary	Primary data	The user suspended the pair from the primary storage system or
data volume	volume, secondary	secondary storage system using the secondary data volume option.
by operator	data volume
By MCU	Secondary data	The secondary storage system received a request from the primary storage
	volume	system to suspend the volume pair. The primary data volume suspend
		type is Primary data volume by Operator or Secondary data volume by
		Operator.
By RCU	Primary data	The primary storage system detected an error condition at the secondary
	volume	storage system which caused the primary storage system to suspend the
		URz volume pair. The secondary data volume suspend type is By MCU.
Delete Pair to	Primary data	The primary storage system detected that the secondary data volume
RCU	volume	status changed to simplex because the user released the pair from the
		secondary storage system. The pair cannot be resumed because the
		secondary data volume does not have the suspended status.
Secondary	Primary data	The primary storage system detected an error during communication with
Data Volume	volume	the secondary storage system or an I/O error during update copy. In this
Failure		case, the secondary data volume suspend type is usually By MCU.
MCU IMPL	Primary data	The primary storage system could not find valid control information in its
	volume, secondary	nonvolatile memory during the IMPL procedure. This condition occurs only
	data volume	if the primary storage system is completely without power for more than
		48 hours (e.g., power failure and fully discharged backup batteries).
Initial Copy	Primary data	The volume pair was suspended before the initial copy operation was
failed	volume, secondary	complete. The data on the secondary data volume is not identical to the
	data volume	data on the primary data volume.
JNL Cache	Primary data	The data volume pair was suspended because it was highly likely that
Overflow	volume, secondary	journal data will overflow.
	data volume
MCU P/S OFF	Secondary data	The primary storage system is powered off.
	volume
Table 2-6	Consistency Status for Suspended URz Secondary Data
	Volumes

Consistency Status

Volume

Description

This URz volume pair was suspended alone. Update sequence consistency between this secondary data volume and other secondary data volumes in this journal group is not ensured. This secondary data volume cannot be used for disaster recovery at the secondary system. This status is indicated when:

–This volume pair was suspended by a user-initiated suspend pair operation with the URz Suspend option set to Volume.

–This volume pair was suspended due to a failure that did not affect the entire consistency group, and the Error Level pair option for this pair is set to Volume.

Chapter 2 About Universal Replicator Operations 2-37

Hitachi Universal Replicator for IBM /OS User’s Guide