User guide

LSI Corporation
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12Gb/s MegaRAID SAS RAID Controllers User Guide
October 2013
Chapter 3: MegaRAID SAS RAID Controller Characteristics
Technical Specifications
3.3.3 Fault Tolerance
The following table lists the fault tolerance features for the 12Gb/s MegaRAID SATA+SAS RAID controllers.
3.3.4 Electrical Characteristics
This subsection provides the power supply requirements for the 12Gb/s MegaRAID SATA+SAS RAID controllers.
3.3.4.1 Power Supply Requirements for the MegaRAID SAS 9341 RAID Controller
All power is supplied to the MegaRAID SAS 9341 RAID controller through the PCIe 12V rail. Onboard switching
regulator circuitry operating from the 12V rail provides the necessary voltages.
The supply voltages are 12V ± 8 percent (from PCI edge connector only). The following table lists the power supply for
the MegaRAID SAS 9341 RAID controller at peak mode and at normal power mode.
3.3.4.2 Operating and Nonoperating Conditions for MegaRAID SAS 9341 RAID Controllers
For the MegaRAID SAS 9341-8i RAID controller, the operating (thermal and atmospheric) conditions are as follows:
 Relative humidity range is 5 percent to 90 percent noncondensing
 Airflow must be at least 75 linear feet per minute (LFPM) to avoid operating the LSISAS3008 processor above the
maximum ambient temperature
 Temperature range: 0 °C to +55 °C
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 8 Fault Tolerance Features
Specification
MegaRAID SAS 9341-4i RAID Controller, MegaRAID SAS 9341-8i RAID Controller,
MegaRAID SAS 9361-4i RAID Controller, MegaRAID SAS 9361-8i RAID Controller
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 9 Power Supply for MegaRAID SAS 9341 RAID Controller
Power Mode Power Mode Description DC Power (Watts)
Peak (on-max) Maximum 19.04 W
On-Normal/Typical Typical 13 W
Table 7 Array Performance Features (Continued)
Specification
MegaRAID SAS 9341-4i RAID Controller, MegaRAID SAS 9341-8i RAID Controller,
MegaRAID SAS 9361-4i RAID Controller, MegaRAID SAS 9361-8i RAID Controller