When a storage device is malfunctioning, you can avoid permanent device loss (PDL) conditions or all paths down (APD) conditions and 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.

1

Migrate virtual machines from the device you plan to detach.

See the vCenter Server and Host Management documentation.

2

Unmount the datastore deployed on the device.

See Unmount Datastores.

3

Detach the storage device.

See Detach Storage Devices.

4

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.

5

Perform any necessary reconfiguration of the storage device by using the array console.

6

Reattach the storage device.

See Attach Storage Devices.

7

Mount the datastore and restart the virtual machines. See Mount Datastores.