LSI MegaRAID SAS User Manual

LSI Corporation
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6Gb/s MegaRAID SAS RAID Controllers User Guide
August 2012
Chapter 3: MegaRAID SAS RAID Controller Characteristics
Technical Specifications
3.3.3 Fault Tolerance
The following table lists the fault tolerance features for the 6Gb/s MegaRAID SAS RAID controllers.
3.3.4 Electrical Characteristics
This subsection provides the power supply requirements for the 6Gb/s MegaRAID SAS RAID controllers.
3.3.4.1 Power Supply Requirements for MegaRAID SAS 9240 RAID Controllers
All power is supplied to the MegaRAID SAS 9240-4i RAID controller and the MegaRAID SAS 9240-8i 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 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 drive 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 RAID controllers for each of the three states at the
different voltages.
Maximum queue tags per drive As many as the drive can accept
Strip sizes 8 KB, 16 KB, 32 KB, 64 KB, 128 KB, 256 KB, 512 KB, or 1 MB
Maximum number of concurrent commands 255
Table 23 Fault Tolerance Features
Specification
MegaRAID SAS 9240, SAS 9260, SAS 9261, SAS 9265, SAS 9266, SAS 9280,
and SAS 9285 RAID Controllers
Support for SMART
a
a. The Self Monitoring Analysis and Reporting Technology (SMART) detects up to 70 percent of all predictable drive failures. In addition,
SMART monitors the internal performance of all motors, heads, and drive electronics.
Yes
Drive failure detection Automatic
Drive rebuild using hot spares Automatic
Parity generation and checking Yes
Table 24 Power Supply for MegaRAID SAS 9240 RAID Controllers
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
(iBBU applications only)
30mA 30mA 30mA
Table 22 Array Performance Features (Continued)
Specification
MegaRAID SAS 9240, SAS 9260, SAS 9261, SAS 9265, SAS 9266, SAS 9270,
SAS 9271, SAS 9280, SAS 9285, and SAS 9286 RAID Controllers

LSI MegaRAID SAS Specifications

General

RAID Levels	0, 1, 5
Ports	8
Form Factor	Low Profile
Operating Systems Supported	Windows, Linux, VMware
SAS Ports	8
BBU Support	Optional
Operating Temperature	0°C to 55°C