vmware esxi – VMDK disk became read only & how to avoid such this cases on rhel machines

we have Kafka cluster with RHEL 7.6 , all Kafka are VM machines

on one of the Kafka machines , we noticed that sdb disk became read only ( when sda is the OS disk )

 mount | grep sdb
/dev/sdb on /var/data/kafka_DB type ext4 (ro,noatime,data=ordered)

from my point of view its little strange that DISK VMDK became read only ( because its not mechanic disk )

from red-hat I find the following



but not sure if above suggestions from redhat are the answer why disk became read only

any others opinions?