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Technical Specifications 3-17
Copyright © 2009 by LSI Corporation. All rights reserved.
3.3.3 Fault Tolerance
Table 3.9 lists the fault tolerance features for the MegaRAID 6Gb/s SAS
RAID controllers.
3.3.4 Electrical Characteristics
This subsection provides the power supply requirements for the
MegaRAID 6Gb/s SAS RAID controllers.
3.3.4.1 Power Supply Requirements for SAS 9240 RAID Controllers
All power is supplied to the SAS 9240 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 provide the necessary
Maximum queue tags per drive As many as the drive can accept
Stripe sizes 8 Kbytes, 16 Kbytes, 32 Kbytes, 64 Kbytes,
128 Kbytes, 256 Kbytes, 512 Kbytes, or
1Mbyte
Maximum number of concurrent
commands
255
Table 3.8 Array Performance Features (Cont.)
Specification
MegaRAID SAS 9240, SAS 9260, SAS
9261, and SAS 9280 RAID Controllers
Table 3.9 Fault Tolerance Features
Specification
MegaRAID SAS 9240, SAS 9260, SAS 9261,
and SAS 9280 RAID Controllers
Support for SMART
1
1. 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.
Ye s
Drive failure detection Automatic
Drive rebuild using hot spares Automatic
Parity generation and checking Yes