When a storage device is malfunctioning, you can avoid permanent device loss (PDL) conditions or all paths down (APD) conditions. Perform a planned removal and reconnection of a storage device.
Planned device removal is an intentional disconnection of a storage device. You might also plan to remove a device for such reasons as upgrading your hardware or reconfiguring your storage devices. When you perform an orderly removal and reconnection of a storage device, you complete a number of tasks.
|Migrate virtual machines from the device you plan to detach.||vCenter Server and Host Management|
|Unmount the datastore deployed on the device.||See Unmount Datastores.|
|Detach the storage device.||See Detach Storage Devices.|
|For an iSCSI device with a single LUN per target, delete the static target entry from each iSCSI HBA that has a path to the storage device.||See Remove Dynamic or Static iSCSI Targets.|
|Perform any necessary reconfiguration of the storage device by using the array console.||See your vendor documentation.|
|Reattach the storage device.||See Attach Storage Devices.|
|Mount the datastore and restart the virtual machines.||See Mount Datastores.|