At which stage in the Unity power up sequence would the Storage Processor enter Service mode upon
detecting an error?

A.
After the CMI is started

B.
Bootflash

C.
POST

D.
BIOS

Explanation:
Note: Boot counters are a troubleshooting mechanism that is designed into the Unity architecture to help
pinpoint the specific cause of software or hardware events during the boot sequence. If the Unity system
detects a problem with software or hardware components, its corresponding Boot Counter is incremented. If a
counter reaches a predefined threshold, the SP boots into Service Mode during its next boot cycle.
https://www.emc.com/collateral/TechnicalDocument/docu69328.pdf (page 12)