When "multipath -ll srevgpv01" is run, don't get any output, with -v3 verbose its obsered that its blacklisted.

Issue

• Can't quite figure out the problem. Here is the scenario.
  Server with luns from EMC clariion, the problem is that one of the luns is somehow blacklisted and couldn't find where it is defined.

When i run "multipath -ll", i could see this lun (srevgpv01).

root@host# multipath -ll | grep -A7 srevgpv01 
srevgpv01 (360060160fb31330096eecd994ae3e211) dm-13 DGC,VRAID
[size=60G][features=1 queue_if_no_path][hwhandler=1 emc][rw]
\_ round-robin 0 [prio=2][active]srevgpv01
 \_ 2:0:1:33 sdag 66:0   [active][ready] 
 \_ 3:0:1:33 sdbu 68:128 [active][ready] 
\_ round-robin 0 [prio=0][enabled]
 \_ 3:0:0:33 sdbb 67:80  [active][ready] 
 \_ 2:0:0:33 sdn  8:208  [active][ready] 

But when i run multipath -ll srevgpv01, i don't get any output, with verbose i see that its blacklisted.

root@host# multipath -ll srevgpv01 -v3
srevgpv01: blacklisted

But i don't find where its blacklisted. i looked little bit if this a known bug but couldn't find any.