Further information - Unexpexted Cluster Switch

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I am not the backup-administrator in our company, but as further information
I note that there was a FILE-System FULLBACKUP on both nodes ( with HP
DataProtector) ; also the physikal QuorumDisk was backuped....
Beginn : 17:15

Is that a possible reason for the erro 5 ?
Should we exclude the Quorumdisk from the backupset ?
(Is a Systemstatebackup sufficiently)

br, matthias

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