On Tue, 2017-10-17 at 09:11 +0200, Hannes Reinecke wrote: > During ALUA state transitions the device might return > a sense code 02/04/0a (Logical unit not accessible, asymmetric > access state transition). As this is a transient error > we should just retry the READ CAPACITY call until > the state transition finishes and the correct > capacity can be returned.
This will lock up the system if some ALUA initiator gets into a state where it always returns transitioning and never completes, which doesn't look like the best way to handle problem devices. I thought after the ALUA transition the LUN gives a unit attention ... can't you use that some way to trigger the capacity re-read, so do asynchronous event notification instead of polling forever. James
