Issue

• How to change the Read/Write State of an Online Logical Unit (LUN) in Red Hat Enterprise Linux?
• LUN status changed at storage but it is not reflecting at OS.

mpath25 (360000970000298700992533030111111) dm-10 EMC,SYMMETRIX
[size=100G][features=1 queue_if_no_path][hwhandler=0][ro]       <<======
\_ round-robin 0 [prio=1][active]
 \_ 8:0:0:0  sdaa 65:160 [active][ready]
 \_ 7:0:0:0  sdb  8:16   [active][ready]

• Rescaned scsi bus using following command, but still status didn't changed.

echo "c t l" >  /sys/class/scsi_host/hostH/scan