ASM Diskgroup Unmounted Following EMC VPLEX Replication Outage
Last updated on DECEMBER 06, 2014
Applies to:Oracle Database - Enterprise Edition - Version 184.108.40.206 to 220.127.116.11 [Release 11.2 to 12.1]
Information in this document applies to any platform.
EXTERNAL diskgroups on RAC (but it could happen on non-RAC too).
Failure tests performed by offlining interconnect between storages.
On the surviving site a diskgroup ( not always the same on different tests) is dismounted due to IO errors.
No I/O errors are reported in OS logs - seems all disks are available,
No changes but testing disk/interconnect failures
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