Once a filesystem became readonly because of the underlying blockdevice was unavailable, why can it not be remounted to readwritable?

Solution Unverified - Updated -

Issue

  • Once a filesystem became readonly because of the underlying blockdevice was unavailable, why can it not be remounted to readwritable?
  • I had a power outage in data center, for many virtual machines the storage became unavailable, filesystems turned readonly. When the power came back, also the storage devices became readwritable again. Yet I am not able to remount them.

Environment

  • Red Hat Enterprise Linux 6

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