The deletepair operation can be used to remove a subset of device pairs from the
group. The SRDF/Metro configuration terminates only when the last pair is removed.
Delete one side of a SRDF/Metro configuration
To remove devices from only one side of a SRDF/Metro configuration, use the
half_deletepair operation to terminate the SRDF/Metro configuration at one side of
the SRDF group.
The half_deletepair operation may be performed on all or on a subset of the SRDF
devices on one side of the SRDF group.
The devices must be in Suspended or Partitioned SRDF pair state to perform the
half_deletepair operation.
After the half_deletepair operation:
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The devices on the side where the half-deletepair operation was performed are no
longer SRDF devices.
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The devices at the other side of the SRDF group retain their configuration as
SRDF/Metro
If all devices are deleted from one side of the SRDF group, that side of the SRDF
group is no longer part of the SRDF/Metro configuration.
Restore native personality to a federated device
Devices in SRDF/Metro configurations have federated personalities. When a device is
removed from an SRDF/Metro configuration, the device personality can be restored
to its original native personality.
The following restrictions apply to restoring the native personality of a device which
has federated personality as a result of a participating in a SRDF/Metro configuration:
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Requires HYPERMAX OS 5977.691.684 or higher.
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The device must be unmapped and unmasked.
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The device must have a federated WWN.
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The device must not be an SRDF device.
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The device must not be a ProtectPoint device.
SRDF/Metro restrictions
The following restrictions and dependencies apply to SRDF/Metro configurations:
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Both the R1 and R2 side must be running HYPERMAX OS 5977.691.684 or greater.
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Only non-SRDF devices can become part of an SRDF/Metro configuration.
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The R1 and R2 must be identical in size.
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Devices cannot have Geometry Compatibility Mode (GCM) or User Geometry set.
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Online device expansion is not supported.
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createpair -establish, establish, restore, and suspend operations apply to all
devices in the SRDF group.
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Control of devices in an SRDF group which contains a mixture of R1s and R2s is
not supported.
Remote replication solutions
SRDF/Metro restrictions 155
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