[dm-devel] Problem about multipath failover

[xingyongji at icloud.com]

Hello:

	My environment like this:

Host
                     Multipath
          Iscsi dev 1.          Iscsi dev. 2
         (A/ optimized)      (A/ optimized)       (ALUA)

Server
         Target 1                Target 2
        （ser 1)                 (ser 2)

    When dev 1 failed, the IO on dev 1 forward to dev2 without any operation,
So I have no chance to do something for the dev 1’s error.
    Before I finish the error on dev1, I do not want any IO on dev1 forward to dev2.
Is there any Mechanism or method can be used?  
    Best Wishes.
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