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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Delete a dynamic SRDF pair

The deletepair operation:

  • Cancels the dynamic SRDF pairs.
  • Removes the pairing information from the array and the SYMAPI database,.
  • If the device file option (-file Filename) is specified, changes the specified devices to non-SRDF devices (except for concurrent SRDF pairs).
  • If the group option (-g GroupName) is specified, changes the device group to a regular device group (except when an SRDF concurrent pair exists).

    When deleting pairs using the group option:

    If additional devices were added to the device group before the symrdf deletepair command is issued, those added devices are also changed to non-SRDF devices, and the device group is changed to a regular device group, only if the added devices contained within it were dynamic devices. If the device group contained both SRDF and non-SRDF devices, the device group would be changed to an Invalid state.

NOTE:

To prevent a device group or a composite group from becoming invalid, first remove the devices from the group before performing the deletepair action on a device file.

After execution of the symrdf deletepair command, the dynamic SRDF pairs are canceled.

NOTE:

Suspend the SRDF links using the symrdf suspend command before using the symrdf deletepair command.

Restrictions

The deletepair operation fails when any of the following conditions exist:

  • The device is in one of the following BCV pair states: Synchronized, SyncInProg, Restored, RestoreInProg, and SplitInProg.
  • There is a background BCV split operation in progress.
  • Devices in the backend are not in the ready state.
  • There is an optimizer swap in progress on a device.
  • SRDF consistency protection is enabled and the devices were not suspended with the -cons_exempt option.
  • The SRDF links are not suspended.

Examples

To delete pairs for a device group:

  • symrdf suspend suspends the SRDF links for group NewGrp
  • symrdf deletepair changes Newgrp to a non-SRDF group

symrdf suspend -sid 55 -g NewGrp

symrdf deletepair -sid 55 -g NewGrp

To delete pairs using a device file:

  • symrdf suspend suspends the SRDF links for the devices listed in devicefile,
  • symrdf deletepair deletes the specified SRDF pairs. The devices become non-SRDF devices.
  • -rdfg 2 specifies the SRDF group number:

symrdf suspend -sid 55 -file devicefile -rdfg 2

symrdf deletepair -sid 55 -file devicefile -rdfg 2

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