Unisphere for PowerMax: The SRDF relationship is deleted when removing devices from an SG
Summary: Removing a device from a storage group (SG) deletes the Symmetrix Remote Data Facility (SRDF) relationship.
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Symptoms
The SRDF attributes of volumes are automatically removed when removing devices from a storage group in Unisphere. For example, this device is RDF1+TDEV before removing it from the TEST_RDF group:
After removing it from the storage group, the device is now a TDEV:
Cause
The following message appears when removing the device from the SG:
Unisphere automatically issues a 'deletepair' operation against the devices when this checkbox is selected. This is to maintain SRDF SG manageability, as users do not want SRDF and non-SRDF devices in an SG as this makes it unmanageable.
Resolution
This behavior is by design. If the SRDF relationship is required to be removed, do not check the box when removing devices from the storage group.
Affected Products
Unisphere for PowerMaxArticle Properties
Article Number: 000204844
Article Type: Solution
Last Modified: 18 Nov 2025
Version: 3
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