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3-20 MegaRAID SAS RAID Controller Characteristics
Copyright © 2009 by LSI Corporation. All rights reserved.
• Temperature range: +10 ° C to +60 ° C without battery backup unit
• Temperature range: +10 °C to +44.5 °C with iBBU battery backup
The parameters for the non-operating (such as storage and transit)
environment for these controllers are:
• Temperature range: −30° C to +80° C without the battery backup unit
• Temperature range: 0° C to +45°C with the battery backup unit
3.3.4.5 Power Supply Requirements for the SAS 9261 RAID Controller
All power is supplied to the SAS 9261 RAID controller 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 provide the necessary
voltages. The following states determine the typical current consumption
of the controller:
• State 1: During a hard reset
• State 2: During a drive stress test
• State 3: While sitting idle at the DOS prompt
The supply voltages are 12V ± 8 percent (from PCI edge connector only)
and 3.3V ± 9 percent (from PCI edge connector only). Table 3. 11 lists
the power supply for the RAID controller for each of the three states at
the different voltages.
Table 3.12 Power Supply for SAS 9261 RAID Controllers
Note:
+12V is used in the charging circuitry for the battery pack
on the optional iBBU battery-backed daughter card. If the
BBU daughter card is mounted, the following power
consumption figures apply:
– During trickle charging of the battery pack: N/A (no
trickle charge for Li-ION)
PCI Edge Connector State 1 State 2 State 3
3.3V supply 330mA 330mA 330mA
+12V supply 1.00A 1.81A 1.53A
3.3V auxiliary supply 30mA 30mA 30mA