3-16 MegaRAID SAS RAID Controller Characteristics
Copyright © 2009 by LSI Corporation. All rights reserved.
3.3.2 Array Performance Features

Tabl e 3.8 shows the array performance features for the MegaRAID 6Gb/s

SAS RAID controllers.

PCI Express bus
data transfer rate
•Up to 5Gb/s per lane
•x8 lane width
Serial port 4-pin RS232-compatible connector (for manufacturing
useonly)
SAS controller •LSISAS2108 Single SAS controller
•LSISAS2008 PCI Express-SAS/SATA I/O Processor
chip
SAS bus speed 6Gb/s
SAS ports SAS connectors with four SAS ports each
Cache configuration The RAID controllers suppor t the following battery-backed
cache configuration:
•512 MB – 72b arrangement (5) 64Mx16, Double Data
Rate II (DDR2) @ 800 MHz battery-backed module
Size of flash ROM
for firmwar e
8 Mbytes
Nonvolatile random
access memory
(NVRAM)
32 Kbytes for storing RAID configurations

Table3.7 RAID Controller Specifications (Cont.)

Specification
MegaRAID SAS 9240, SAS 9260, SAS 9261, and SAS
9280 RAID Controllers

Table3.8 Array Performance Features

Specification
MegaRAID SAS 9240, SAS 9260, SAS
9261, and SAS 9280 RAID Controllers
PCI Express 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 Mbytes in 64-Kbyte stripes