Avago Technologies MegaRAID SAS 9240-4i - Manual (Page 72)

LSI Corporation
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6Gb/s MegaRAID SAS RAID Controllers User Guide
August 2013
MegaRAID SAS RAID Controller Characteristics
Technical Specifications
3.3.2 Array Performance Features
The following table shows the array performance features for the 6Gb/s MegaRAID SAS RAID controllers.
3.3.3 Fault Tolerance
The following table lists the fault tolerance features for the 6Gb/s MegaRAID SAS RAID controllers.
Table 22 Array Performance Features
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
PCIe host data transfer rate 5Gb/s per lane
Drive data transfer rate 6Gb/s per lane
Maximum scatter/gather I/O 80 elements
Maximum size of I/O requests 6.4 MB in 64-KB strips
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
NOTE RAID 0, 1, and 10 configurations for MegaRAID SAS 9240 RAID controllers
are limited to 16 drives and 64K stripe size. To exceed these limitations, you can
plug in a new MegaRAID SAS 9260 RAID controller or a new MegaRAID SAS 9280
RAID controller. The MegaRAID Storage Manager utility recognizes and imports
the existing array with no reconfiguration required.
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