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EMC Disk-Array Processor Enclosure (DPE) Deskside Model FC4400/4500 Hardware Reference
About the Deskside Disk-Array Processor Enclosure
You can remove the drive fan pack while the deskside DPE is powered up.
When a drive fan pack is removed, the Cooling Check light on each power
supply flashes.
If the DPE drive fan pack is removed for more than two minutes, the disk
modules and the SPs power down. The disk modules and the SPs power up
again when you reinstall the drive fan pack.
If the DAE drive fan pack is removed for more than two minutes, the disk
modules power down while the Fibre Channel interconnect system continues
operating. The disk modules power up again when you reinstall the drive fan
pack.
SP Fan Pack
The SP fan pack cools the SPs. It contains three fans that draw
ambient room air through the SP fan pack cover, through the
midplane, and across the SPs. The SP fan pack connects to the DPE
midplane via an internal cable, and either supply can power it. The
fans operate at a lower voltage and speed during normal operation to
minimize acoustic noise. If a fan fails, the voltage and speed of the
remaining fans increase to compensate, resulting in higher acoustic
noise.
Latches on the SP fan pack hold it in place. The SP fan pack has one
status light, which is visible when the SP fan pack cover is removed.
The status light is described in the “Monitoring System Status”
section of Chapter 3.