Configure a new quorum device on the storage enclosure that currently includes the disk to be replaced.
You need to first add a new quorum device to the configuration to take the place of the old device. See "4.1.2 How to Add a Quorum Device" to add a new quorum device to the cluster.
Remove the failed disk as a quorum device.
See "4.1.3 How to Remove a Quorum Device" to remove the old quorum device from the configuration.
Replace the failed disk.
Refer to the hardware procedures for your disk enclosure in the Sun Cluster 3.0 12/01 Hardware Guide.