Avago Technologies MegaRAID SAS 9240-4i - Manual (Page 6)

LSI Corporation
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6Gb/s MegaRAID SAS RAID Controllers User Guide
August 2013
Overview
General Description
The following MegaRAID SATA+SAS RAID controllers can use a Cache Vault Flash Module (CVFM) with a Cache Vault
Power Module (CVPM) to protect cached data in case of a power failure or outage:
 MegaRAID SAS 9260CV-4i
 MegaRAID SAS 9260CV-8i
 MegaRAID SAS 9265CV-8i
 MegaRAID SAS 9266-4i
 MegaRAID SAS 9266-8i
 MegaRAID SAS 9271-4i
 MegaRAID SAS 9271-8i
 MegaRAID SAS 9271-8iCC
 MegaRAID SAS 9285CV-8e
 MegaRAID SAS 9286CV-8e
 MegaRAID SAS 9286CV-8eCC
Refer to the Cache Backup Products for MegaRAID SAS RAID Controllers User Guide, the MegaRAID Cache Vault Power
Module 02 Quick Installation Guide, the battery backup unit quick installation guides, and the RAID controller quick
installation guides on the MegaRAID Universal Software Suite CD for more information about the battery backup units
and the Cache Vault modules.
1.1.3 SAS/SATA Standards and Communication Protocols
MegaRAID SATA+SAS controllers support the ANSI Serial Attached SCSI standard, version 2.0. In addition, the controller
supports the SATA III protocol defined by the Serial ATA specification, version 3.0. Supporting both the SAS interface
and the SATA interface, the SAS controller is a versatile controller that provides the backbone of both server and
high-end workstation environments.
Each port on your MegaRAID SAS RAID controller supports SAS devices, SATA devices, or both, by using the
following protocols:
 SAS Serial SCSI Protocol (SSP), which enables communication with other SAS devices
 SATA, which enables communication with other SATA devices
 Serial Management Protocol (SMP), which communicates topology management information directly with an
attached SAS expander device
 Serial Tunneling Protocol (STP), which enables communication with SATA devices through an attached expander
1.2 General Description
The MegaRAID 6Gb/s SAS RAID controllers bring 6Gb/s Serial Attached SCSI and 6Gb/s SATA III performance to host
adapter, workstation, and server designs. The controllers support internal storage devices and external storage
devices, which allow you to use a system that supports enterprise-class SAS drives and desktop-class SATA III drives.
Each MegaRAID 6Gb/s SAS RAID controller can connect to drives directly and can use expanders to connect to
additional drives. Simplified cabling between devices is an additional benefit.
These MegaRAID SATA+SAS RAID controllers are based on the following chips and devices:
 LSISAS2008 PCIe-SAS/SATA I/O Processor chip
 LSISAS2108 RAID On-a-Chip (ROC) device
 LSISAS2208 RAID On-a-Chip (ROC) device