Interesting - first time I'm seeing 0/0/0. The 1st is usually 0x2 (see [1]), and then the rest [2], [3] make sense.

A google search found another user with Clarion with the exact same error[4], so I'm leaning toward misconfiguration of multipathing/clarion here.

Is your multipathing configuration working well for you?

Are you sure it's a EL7 configuration? For example, I believe you should have rr_min_io_rq and not rr_min_io .

Y.

[1] http://www.t10.org/lists/2status.htm

[2] http://www.t10.org/lists/2sensekey.htm

[3] http://www.t10.org/lists/asc-num.htm

[4] http://www.linuxquestions.org/questions/centos-111/multipath-problems-4175544908/