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6Gb/s MegaRAID SAS RAID Controllers User Guide

August 2012

Chapter 3: MegaRAID SAS RAID Controller Characteristics

Technical Specifications

3.3.4.19 Power Supply Requirements for MegaRAID SAS 9280-4i4e, SAS 9280-8e, and SAS 9280DE-8e RAID Controllers

All power is supplied to the MegaRAID SAS 9280-4i4e, SAS 9280-8e, and SAS 9280DE-8e RAID controllers through the

PCI Express 3.3V rails and the 12V rail. Onboard switching regulator circuitry operating from the 3.3V rails and the

12V rail provides the necessary voltages. The following states determine the typical current consumption of

the controller:

 State 1: During a hard reset

 State 2: During a disk stress test

 State 3: While sitting idle at the DOS prompt

The supply voltages are 12V ± 8 percent (from the PCI edge connector only) and 3.3V ± 9 percent (from the PCI edge

connector only). The following table lists the power supply for the controller for each of the three states at the

different voltages.

3.3.4.20 Operating and Nonoperating Conditions for MegaRAID SAS 9280-4i4e, SAS 9280-8e, and SAS 9280DE-8e RAID

Controllers

The operating (thermal and atmospheric) conditions for the MegaRAID SAS 9280-4i4e, SAS 9280-8e, and

SAS 9280DE-8e RAID controllers are as follows:

 Relative humidity range is 5 percent to 90 percent noncondensing.

 Airflow must be at least 200 linear feet per minute (LFPM) to avoid operating the LSISAS2108 processor above the

maximum ambient temperature.

 Temperature range: +10 °C to +60 °C without the battery backup unit.

 Temperature range: +10 °C to +44.5 °C with the iBBU battery backup.

The parameters for the nonoperating (such as storage and transit) environment for the controller are as follows:

 Temperature range: –30 °C to +80 °C without the battery backup unit.

 Temperature range: 0 °C to +45 °C with the iBBU battery backup.

Table 33 Power Supply for MegaRAID SAS 9280-4i4e, SAS 9280-8e, and SAS 9280DE-8e RAID Controllers

PCI Edge Connector State 1 State 2 State 3

3.3V supply 623mA 697mA 617mA

+12V supply 813mA 963mA 767mA

3.3V auxiliary supply N/A N/A N/A

NOTE The charging circuitry for the battery pack on the optional iBBU battery-backed daughter card uses

+12V. If the iBBU daughter card is mounted, the following power consumption figures apply:

During fast charging of the battery pack: 230mA in +12V current.

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 91 92

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LSI MegaRAID SAS 9286-8e Guía de usuario Pagina 81