device-mapper: table: 253:4: multipath: error attaching hardware handler

[Harsha Sabbineni <harsha.kgp@xxxxxxxxx>]

Hi, 

I am seeing this error with multipath-tools device-mapper-multipath-0.4.9-23.0.9.el5 and 2.6.32-200.20.1.el5uek

device-mapper: table: 253:4: multipath: error attaching hardware handler
device-mapper: ioctl: error adding target to table


multipath.conf has this. I am trying to use rdac.

devices {
  device {
     vendor                  "*"
     product                 "*"
     features                "1 queue_if_no_path"
     hardware_handler        "1 rdac"
     path_selector           "round-robin 0"
     path_grouping_policy    group_by_prio
     failback                immediate
     rr_weight               uniform
     no_path_retry           20
     rr_min_io               1000
     path_checker            rdac
     prio                    rdac
  }
}

I have tried doing multipath -F and then restarting multipathd but the error does not go away. 
Is this a bug thats been fixed in later versions by any chance?

thanks in advance,
Harsha
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