Suggested Answer:
The Battery Backup Unit (BBU) provides power to the Storage Processor in the event that cabinet power is lost. The BBU is designed to power the SP long enough for the system to store SP cache content to the M.2 SSD device before powering down. The BBU includes sensors which communicate its charge and health status to the SP. In the event the BBU is discharged the SP will disable cache until the BBU has recharged. In the event the BBU has faulted or cannot sustain enough charge, an alert will be generated. References: https://www.emc.com/collateral/white-papers/h15084-emc-unity-introduction-to-the-unity-platform.pdf
The proposed answer is the correct answer : https://www.dell.com/support/kbdoc/en-us/000019201/unity-loss-of-ac-power-scenario-on-unity-arrays-user-correctable
"Upon loss of A/C power, the SPs immediately reboot into low_power_mode , and while on battery, vault cache to the local M2.SATA drive"
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
learner
Highly Voted 4 years, 7 months agoKof_81
3 years, 2 months agoKof_81
Most Recent 3 years, 2 months agoKof_81
3 years, 2 months ago