Avago Technologies MegaRAID SAS 9240-4i - Manual (Page 12)

LSI Corporation
- 12 -
6Gb/s MegaRAID SAS RAID Controllers User Guide
August 2013
Overview
Summary of 6Gb/s MegaRAID SATA+SAS RAID Controller Characteristics
 Support for a 1-GB DDR3 1333-MT/s onboard SDRAM for LSISAS2208-based controllers
 One internal connector for the MegaRAID SAS 9240-4i, SAS 9260-4i, SAS 9260CV-4i, SAS 9266-4i, SAS 9271-4i, and
SAS 9280-4i4e RAID controllers
 Two internal connectors for the MegaRAID SAS 9240-8i, SAS 9260-8i, SAS 9260CV-8i, SAS 9260DE-8i, SAS 9261-8i,
SAS 9265CV-8i, SAS 9265-8i, SAS 9266-8i, SAS 9270-8i, and SAS 9271-8i RAID controllers
 Four internal connectors for the MegaRAID SAS 9260-16i and SAS 9280-16i4e RAID controllers
 Six internal connectors for the MegaRAID SAS 9280-24i4e RAID controller
 One external connector for the MegaRAID SAS 9280-4i4e, SAS 9280-16i4e, and SAS 9280-24i4e RAID controllers
 Two external connectors for the MegaRAID SAS 9280-8e, SAS 9280DE-8e, SAS 9285-8e, SAS 9285CV-8e, SAS
9285DE-8e, SAS 9286-8e, SAS 9286CV-8e, SAS 9286CV-8eCC RAID controllers
 Support for RAID levels 0, 1, 5, 6, 10, 50, and 60
 Advanced array configuration and management utilities
 Support for global hot spares and dedicated hot spares
 Support for user-defined strip sizes: 8, 16, 32, 64, 128, 256, 512, or 1024 KB
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.
 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
 User-specified rebuild rate (specifying the percentage of system resources to use from 0 percent to 100 percent)
 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.
1.6.1 SAS Features
The MegaRAID 6Gb/s SAS RAID controllers support the following SAS features:
 Four fully independent PHYs or eight fully independent PHYs, depending on the controller.
 Support of 6Gb/s and 3Gb/s SAS data transfers per PHY.
 Support of SMP to communicate topology-management information.
 Support of SSP to enable communication with other SAS devices.
 Support of STP to enable communication with SATA devices through an attached expander.
 Serial, point-to-point, enterprise-level storage interface.
 Simplified cabling between devices.
 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 website (
http://www.lsi.com ) for specific details about
your product.