Using partprobe on /dev/mapper devices exposes extended partition if it exists in RHEL5

Solution Unverified - Updated -

Issue

  • Clients are reporting that some EMC LUNS being presented to a 5.3 host are having the p4 extended partition get misread in device-mapper and even show some size which causes them trouble when Oracle is trying to use it for writing data and subsequently are losing some data.

Environment

  • Red Hat Enterprise Linux 5

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