Avoid unwanted SRs and callbacks during planned maintenance & upgrades.

During array maintenance and upgrades there are times when a callhome will be triggered, generating ASRs and customer callbacks.
These can be avoided by temporarily disabling the callhome feature for the duration of the activity (remember to re-enable it once complete).

For more information, refer to  Pillar Axiom: How to Disable Call Home to Prevent Automatic Service Request ASR Generation