How to Manually Refresh Multipath Write Protection Status from "wp=ro" to "wp=rw"
(Doc ID 2660512.1)
Last updated on APRIL 23, 2020
Applies to:Linux OS - Version Oracle Linux 6.0 and later
Normally multipath will refersh the write protection status automatically.
In some rare cases when multipath is reporting write protection as "wp=ro" for some certain dm-mp devices, we could do a manual refresh without a reboot.
Most times, the device is actually writable even if it shows as "wp=ro".
# multipath -l
360000000000000000000000000000001 dm-16 EMC,SYMMETRIX
size=200G features='1 queue_if_no_path' hwhandler='0' wp=ro <<=== write protection shows as "wp=ro" for this disk
`-+- policy='round-robin 0' prio=0 status=active
|- 0:0:0:8 sde 16:111 active undef unknown
`- 2:0:0:8 sdf 17:222 active undef unknown
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