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Client has PowerHA 7.1.3 installations with PowerPath 6.1. He would like to use tiebreaker disk as split/merge policy. EMC has introduced PR_exclusive reservation in PowerPath 6.1 and EMC support says: "Support for PR_exclusive reserve_policy on EMC hdiskpower devices: This support allows hdiskpower devices to set Tiebreaker disk in PowerHA." Moreover EMC official documentation confirms that PP 6.1 introduced PR_exclusive and it's supported with PowerHA tiebreaker disk: https://uk.emc.com/collateral/TechnicalDocument/docu5126.pdf page 356.
Nevertheless IBM support confirms in 25630,820,820 PMR that tiebreaker is NOT supported with any PowerPath version.
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