User`s guide

1-10 Overview
Copyright © 2009 by LSI Corporation. All rights reserved.
• 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 for the SAS 9260-4i RAID
controller and eight for the SAS 9260-8i RAID 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
• Supports STP to enable communication with a SATA II device
through an attached expander
• Provides a serial, point-to-point, enterprise-level storage interface
• Simplifies cabling between devices
• Provides a scalable interface that supports up to 240 devices through
the use of expanders
Note:
The number of devices varies depending on the MegaRAID
product. Check the LSI web site (http://www.lsi.com) for
specific details about your product.
• Supports wide ports consisting of 2, 3, or 4 PHYs within a single
quad port
• Supports narrow ports consisting of a single PHY
• Transfers data using SCSI information units
1.6.2 SATA II Features
The following list describes the SATA II features of the RAID controllers:
• Supports SATA II data transfers of 3Gb/s
• Supports STP data transfers of 3Gb/s
• Provides a serial, point-to-point storage interface