DellPowerEdge M1000e Technical Guide 33This hardware design is coupled with a thermal cooling algorithm that incorporates the following:• Server module level thermal monitoring by the iDRAC• I/O module thermal health monitors• Fan control and monitoring by the CMCThe iDRAC on each server module calculates the amount of airflow required on an individual servermodule level and sends a request to the CMC. This request is based on temperature conditions on theserver module, as well as passive requirements due to hardware configuration. Concurrently, eachIOM can send a request to the CMC to increase or decrease cooling to the I/O subsystem. The CMCinterprets these requests, and can control the fans as required to maintain Server and I/O Moduleairflow at optimal levels.5.4 Environmental SpecificationsSee the Getting Started Guide on support.dell.com.5.5 Power ConsumptionUse the Dell Energy Smart Solution Advisor (ESSA) to see requirements for a specific chassisconfiguration.5.6 Maximum Input AmpsSee Power Distribution Systems for the Dell M1000e Modular Server Enclosure – Selection andInstallation.5.7 Power-Up SequenceThe following steps detail how and in what order the M1000e components are powered up:1. The first power supply provides a small amount of electricity which starts up the first CMC.2. CMC begins to boot and power up the power supply units.3. Active and Standby CMC boot up Linux® operating system.4. Active CMC powers up all remaining PSUs.5. All six PSUs are powered up.6. Server iDRAC are powered up. (In slot priority order from 1–9; i.e., highest priority 1 slotsfirst, then priority 2, etc. If all same priority, goes in slot order 1–16. Each one is spaced apartby 500ms.)7. iKVM is powered up.8. IOM modules are powered up.9. Depending upon Blade BIOS power setting (last power state, always on or always off), bladeiDRAC requests power up from CMC first come/first served in order from #6.10. CMC powers up blades.For full configuration, booting the enclosure takes between 2–4 minutes, followed by 1–4 minutes foreach blade.5.8 AcousticsThe M1000e is engineered for sound quality in accordance with the Dell Enterprise acousticalspecification. Compared to previous generations of products, the fans have more levels of controland finer tuning of the fan behavior. Firmware is optimized to choose the lowest fan speeds and