Windows Event ID 55 after mounting drives from failover command

Question

We have recently failed over to our DR site with Recoverpoint and all went well, 48 hours later we failed back to PROD and executed the failover command, enabled image access, rescanned drives and then mounted the drives on a Windows Server 2003 host. We received EVENT ID 55 in the Windows event viewer logs. After an additional drive rescan the logs all looked fine. Now 16 hours later we are seeing theses events in the Windows event viewer again. When we bring up our image on the DR site host we do not get any of these events, but our PROD site host seems to have it. Any help would be appreciated.

DA · Answer

There are many reasons why you may be getting Event ID 55 (corrupt data on disk) ranging from Microsoft Cluster issues to specific PowerPath versions. I would check EMC knowledgebase vs. your configuration. For example, there is one solution listing RecoverPoint in conflict with Diskeeper 2007 EnterpriseServer , version 11.0.704.32 - emc192931.

hw949 · Answer

Thanks Dmitry,We do not use Microsoft Cluster or Diskkeeper. What we have got though is the allocation unit size set for SQL performance and the drive formatted as BASIC not dynamic. This error code only started appearing once we started accessing the image on our Production server whilst we were failing over from our DR replicated LUNs.

BrianMarsh · Answer

We had Event 55 errors when doing failover. We installed MS Hotfix 932578 and the issue cleared up.
Check your file version for ntfs.sys for the version of Windows your running and if it's lower than the one in this hotfix, try installing it.

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