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# Read or Write disable R1 or R2 volumes

Symmetrix Remote Data Facility (SRDF) facilitates the data replication from one storage system to another through a storage area network or Internet Protocol (IP) network.

## Prerequisites

See Roles and associated permissions to determine the user roles that can perform this task.

You cannot perform SRDF/Metro control actions at the storage group level on the SRDF/Metro pairs in a standard SRDF view. You cannot perform standard SRDF actions on the SRDF/Metro leg in a standard SRDF view. If you are viewing a storage system that is not associated with either side of the pair of interest, you must go to the view of the relevant storage system.

This operation is blocked on SRDF groups that Global Mirror uses.

## About this task

This procedure explains how to write disable source (R1) volumes or target (R2) volumes to their local hosts.

The Write Disable R1 operation is not allowed on the non-Metro SRDF mirror when it results in a SRDF/Metro device becoming write-disabled (WD).

This operation can be invoked from multiple locations in the Unisphere user interface (Device group > SRDF Group, Device Group > SRDF Pairs, SG All Details > SRDF tab, Protection dashboard) . Depending on where the operation is invoked, some of the steps below may not apply.

To write disable R1/R2 volumes:

## Steps

1. Select the storage system.
2. Click Protection to view the Protection dashboard and select SRDF from the Protected Storage Groups section of the summary panel.
3. Do the following, depending on whether you want to perform the operation at the group level or pair level:
   - Group level:
     - Select a group, click , and click Write Disable.
     - Select the Use 2nd Hop option if including the second hop of a cascaded SRDF configuration (not applicable if the hop2 is SRDF/Metro).
     - Select Write Disable R1s or Write Disable R2s volume type.
   - Pair level:
     - Select a group and click .
     - Select one or more pairs, click , and select Write Disable.
     - Select R1 or R2 volume type.
4. Do one of the following:
   - Click Run Now to perform the operation now.
   - Expand Run Now and click Add to Job List to add this task to the job list, from which you can schedule or run the task at your convenience. For more information, see Schedule jobs and Preview jobs.

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