4
Megaplex II 4U Chassis Guide
Specifications,
Continued
SCSI Drives
The 4U chassis supports three hot plug 3.5” 16-bit single-ended SCA LVD SCSI drives.
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These drives are accessible from the front.
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Each drive bay can take a 1” SCSI LVD drive.
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The three drives are arranged on one back plane. The back plane supports three drives. The
default IDs of these drives are 1, 2, and 3.
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Access to the back plane is through one Wide SCSI cable. This cable can be connected, for
example, to one channel on a RAID controller.
Cooling
There are two fans mounted in the middle of the chassis. These fans are hot plug and are
monitored by the Megaplex II system BIOS Health screen and the management software shipped
with Megaplex II.
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There are three blower fans in the power supply assemblies.
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For cooling the CPU area, the CPU top plate must be installed and the Top Chassis cover
must be closed.
Chassis Intrusion
There is a chassis intrusion switch that detects when the top system cover is open. This switch is
monitored through the management software provided with Megaplex II.
Chassis Alarm Indication
There are some LEDs and alarms that are displayed on the chassis:
Each of the three power supplies has an alarm. When one of the power supply fails, the RED LED
for that power supply comes on and the buzzer goes off.
Each of the two middle fans has an alarm. When one of the fans fail, the RED LED for that fan
comes on and the buzzer goes off.
Note:
There is an Alarm Mute switch that will turn off the buzzer.
Cont’d
