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• Two internal connectors for the SAS 9240-8i, SAS 9260-8i, SAS
9261-8i, and SAS 9260DE-8i RAID controllers
• One external connector for the SAS 9280-4i/4e RAID controller
• Two external connectors for the SAS 9280-8e RAID controller and
the SAS 9280DE-8e RAID controller
• Support for RAID levels 0, 1, 5, 6, 00, 10, 50, and 60
• Advanced array configuration and management utilities
• Support for global hot spares and dedicated hot spares
• Support for user-defined stripe sizes: 8, 16, 32, 64, 128, 256, 512,
or 1024 KB
• Advanced array configuration and management utilities offer:
– Online capacity expansion to add space to an existing drive or
new drive
– Online RAID level migration
–Drive migration
–Drive roaming
– No reboot necessary after expansion
– Load balancing
– Media scan
• User-specified rebuild rate (specifying the percentage of system
resources to use from 0%-100%)
• 32-Kbyte nonvolatile random access memory (NVRAM) for storing
RAID system configuration information; the MegaRAID SAS firmware
is stored in flash ROM for easy upgrade.
1.6.1 SAS Features
The following list describes the SAS features of the RAID controllers:
• Provides four fully independent PHYs or eight fully independent
PHYs, depending on the controller
• Supports 6Gb/s and 3Gb/s SAS data transfers per PHY
• Supports SMP to communicate topology management information
• Supports SSP to enable communication with other SAS devices