Event ID - 721

Event Id721
Event SourceDell PowerVault
DescriptionParity error found
More InformationAccording to Dell:
Cause:

An array disk did not generate proper parity.
A cable connection is bad.
Another array disk interfered

Resolution:
Check all cables, making sure they are correctly and firmly connected and that none are crossed. See the Dell PowerVault 660F and 224F Storage Systems Installation and Troubleshooting Guide for cabling procedures.
Reference Linksevent id :721 and source :Dell PowerVault

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