vsphere-esxi-vcenter-server-55-storage-guide

vSphere StoragePerforming Planned Storage Device RemovalWhen a storage device is malfunctioning, you can avoid permanent device loss (PDL) conditions or all pathsdown (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 adevice for such reasons as upgrading your hardware or reconfiguring your storage devices. When youperform 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 VMFS or NFS Datastores,” on page 145.3 Detach the storage device.See “Detach Storage Devices,” on page 126.4 For an iSCSI device with a single LUN per target, delete the static target entry from each iSCSI HBAthat has a path to the storage device.See “Remove Static Targets in the vSphere Web Client,” on page 92.5 Perform any necessary reconfiguration of the storage device by using the array console.6 Reattach the storage device.See “Attach Storage Devices,” on page 127.7 Mount the datastore and restart the virtual machines. See “Mount VMFS Datastores,” on page 146.Detach Storage DevicesSafely detach a storage device from your host.You might need to detach the device to make it inaccessible to your host, when, for example, you perform ahardware upgrade on the storage side.Prerequisites• The device does not contain any datastores.• No virtual machines use the device as an RDM disk.• The device does not contain a diagnostic partition or a scratch partition.Procedure1 In the vSphere Web Client, display storage devices.2 Select the device to detach and click the Detach icon.The device becomes inaccessible. The operational state of the device changes to Unmounted.What to do nextIf multiple hosts share the device, detach the device from each host.126 VMware, Inc.