I have 2U unit (DPE) with 2 controllers.
When i try to power up the unit, the warning amber light is on and the unit is not powering on.
Since i don't have a SPS unit, Doe's the 1U SPS (Spare Power Supply) is mandatory to work with the AX4?
You do need the SPS in order to power up your AX4-5. Also since you have 2 controllers you need to have both power supplies in the system.
Please let us know if you have any other questions.
DELL-Sam LDell | Social Outreach Services - EnterpriseDownload the Dell Quick Resource Locator app today to access PowerEdge support content on your mobile device! (iOS, Android, Windows)Get Support on Twitter @DellCaresPro