Hardware User Guide

12Gb/s Intel® RAID Controllers User Guide 8
SAS Features
The 12Gb/s Intel
®
RAID Controllers support the following SAS features:
• They provide four fully independent PHYs or eight fully independent PHYs,
depending on the controller.
• They support 12 Gb/s, 6Gb/s and 3Gb/s SAS data transfers per PHY.
• They support SMP to communicate topology-management information.
• They support SSP to enable communication with other SAS devices.
• They support STP to enable communication with SATA devices through an
attached expander.
• They provide a serial, point-to-point, enterprise-level storage interface.
• They simplify cabling between devices.
• They provide a scalable interface that supports up to 240 devices through the use of
expanders.
Advanced array configuration and
management utilities offer these
capabilities:
• Online capacity expansion to
add space to an existing drive
or a new drive
• Online RAID level migration
• Drive migration
• Drive roaming
• No reboot necessary after
expansion
• Load balancing
• Media scan
Yes Yes Yes Yes Yes
User-specified rebuild rate
(specifying the percentage of
system resources to use from 0
percent to 100 percent)
Yes Yes Yes Yes Yes
Nonvolatile random access memory
(NVRAM) of 32 KB for storing RAID
system configuration information;
the MegaRAID SAS firmware is
stored in flash ROM for easy
upgrade.
Yes Yes Yes Yes Yes
Full MegaRAID Software Stack No Yes Yes Yes Yes
iMR Software Stack Yes No No No No
Feature
RS3WC080/
RMS3HC080
RS3DC040
RS3DC080/
RMS3CC080
RS3MC044 RS3SC008