Why multipath marked a SAN LUN subpath as active/faulty where as it's visible to system?

Issue

• After a SAN outage, one of lun marked as active/faulty where as it's visible to system:

sda: checker msg is "tur checker reports path is down"
mpath0 (36001438005deca3f0000400076e90000) dm-0 HP,HSV400
[size=50G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=100][active]
 \_ 0:0:2:1 sdc 8:32  [active][ready]
 \_ 1:0:2:1 sdf 8:80  [active][ready]
\_ round-robin 0 [prio=30][enabled]
 \_ 0:0:1:1 sdb 8:16  [active][ready]
 \_ 1:0:0:1 sdd 8:48  [active][ready]
 \_ 1:0:1:1 sde 8:64  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 0:0:0:1 sda 8:0   [active][faulty]   <---

• sda is marked as active/faulty:

# multipath
sda: checker msg is "tur checker reports path is down"
/sbin/scsi_id exitted with 1
cannot get the the wwid for sda   <---
sda: checker msg is "tur checker reports path is down"

• Following command does not show wwid of the device:

 scsi_id -g -u -s /block/sda

• fdisk -l of the /dev/sda device shows partition tables.