Error: The LDEV Is Being Used by the Host, or an Error Occurred During Storage Navigator Processing

Stop Host IO to the LDEV

The preferred action is to stop IO to the LDEV from the host. This will ensure the host is not trying any reads/writes, and there is less chance of losing anything in flight.

If needed, the LDEV can be blocked from Storage Navigator to stop all IO to the LDEV. However, in some instances, there is a possibility the host will still try to read/write to the LDEV which may not prevent the error from happening.

Wait It Out

If the cause is Storage Navigator being busy, it is important to wait at least one minute (recommended five minutes).

If the cause is Host IO, it is important also to wait to make sure there is no longer IO down the path(s) and that the array has been able to make sure nothing has come through the path for at least one minute.

Reboot the Management Interfaces

How to Reset Management Interfaces for VSP F/E/N/Gxx0 Storage

Enable Host Mode Option 91

Enable Host Mode Option 91 on the Host Group(s) that LDEV belongs to, and then retry the action after five minutes.