DR Clustering Considerations for Disk and Tape Drives

DR remove operations on active drives in the primary node are not allowed. DR remove operations can be performed on non-active drives in the primary node and on drives in the secondary node. Cluster data access continues both before and after the DR operation.

DR operations that affect the availability of quorum devices are not allowed. For considerations about quorum devices and the procedure for performing DR operations on them, see "DR Clustering Considerations for Quorum Devices".

The following steps describe a brief summary of the procedure for performing a DR remove operation on a disk or tape drive. See the Sun Cluster 3.0 U1 System Administration Guide for detailed instructions on how to perform these actions.

1. Determine whether the disk or tape drive is part of an active device group.

   • If the drive is not part of an active device group, you can perform the DR remove operation on it.

   • If the DR remove-board operation would affect an active disk or tape drive, the system rejects the operation and identifies the drives that would be affected by the operation. If the drive is part of an active device group, go to Step 2.

2. Determine whether the drive is a component of the primary node or the secondary node.

   • If the drive is a component of the secondary node, you can perform the DR remove operation on it.

   • If the drive is a component of the primary node, you must switch the primary and secondary nodes before performing the DR remove operation on the device.

If the current primary node fails while you are performing the DR operation on a secondary node, cluster availability is impacted. The primary node has no place to fail over until a new secondary node is provided.