Справочник Пользователя для IBM Flex System V7000 Expansion Enclosure 4939H29
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4939H29
Chapter 9. IBM Flex System V7000 Storage Node Copy Services
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8068ch09-Copy Servies.fm
added to the consistency group. After the consistency group is assigned a copy type, only
relationships of that copy type can be added to the consistency group.
relationships of that copy type can be added to the consistency group.
Remote Copy and consistency group states
Stand-alone Remote Copy relationships and consistency groups share a common
configuration and state model. All of the relationships in a non-empty consistency group have
the same state as the consistency group.
configuration and state model. All of the relationships in a non-empty consistency group have
the same state as the consistency group.
These states apply to both the relationships and the consistency groups, except for the Empty
state, which is only for consistency groups:
state, which is only for consistency groups:
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InconsistentStopped
The primary volumes are accessible for read and write I/O operations, but the secondary
volumes are not accessible for either one. A copy process must be started to make the
secondary volumes consistent.
volumes are not accessible for either one. A copy process must be started to make the
secondary volumes consistent.
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InconsistentCopying
The primary volumes are accessible for read and write I/O operations, but the secondary
volumes are not accessible for either one. This state indicates that a copy process is
ongoing from the primary to the secondary volume.
volumes are not accessible for either one. This state indicates that a copy process is
ongoing from the primary to the secondary volume.
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ConsistentStopped
The secondary volumes contain a consistent image, but it might be out-of-date with
respect to the primary volumes. This state can occur when a relationship was in the
ConsistentSynchronized state and experiences an error that forces a freeze of the
consistency group or the Remote Copy relationship.
respect to the primary volumes. This state can occur when a relationship was in the
ConsistentSynchronized state and experiences an error that forces a freeze of the
consistency group or the Remote Copy relationship.
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ConsistentSynchronized
The primary volumes are accessible for read and write I/O operations. The secondary
volumes are accessible for read-only I/O operations.
volumes are accessible for read-only I/O operations.
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Idling
Both the primary volumes and the secondary volumes are operating in the primary role.
Consequently, the volumes are accessible for write I/O operations.
Consequently, the volumes are accessible for write I/O operations.
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IdlingDisconnected
The volumes in this half of the consistency group are all operating in the primary role and
can accept read or write I/O operations.
can accept read or write I/O operations.
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InconsistentDisconnected
The volumes in this half of the consistency group are all operating in the secondary role
and cannot accept read or write I/O operations.
and cannot accept read or write I/O operations.