Introduction To Integrated Raid - MSI 5500 Master Series User Manual

M S-96C8 Server Board

1. Introduction to Integrated RAID

This section provides an overview of the LSI Logic Integrated RAID solution for LSI
Logic SAS controllers, its features, and its benefits.
The LSI Logic Integrated RAID solution provides cost benefits for the server or
workstation market where the extra performance, storage capacity, and/or redun-
dancy of a RAID configuration are required. The two components of Integrated RAID
are:
Integrated Mirroring (IM), which provides features of RAID 1 and RAID 1E
(RAID 1 Enhanced). RAID 1E is also called Integrated Mirroring Enhanced
(IME)
Integrated Striping (IS), which provides features of RAID 0
By simplifying the IM and IS configuration options and by providing firmware support
in its host adapters, LSI Logic can offer the Integrated RAID solution at a lower cost
than a hardware RAID implementation.
Fusion-MPT™ firmware supports IM and IS volumes. You can configure IM and IS
volumes together on the same LSI Logic SAS controller.
Integrated RAID Benefits and Features
Low cost RAID volume creation meets the needs of most internal RAID instal-
lations
Easy to use - installation and configuration are not complex
System can boot from an IM, IME, or IS volume
No special OS-specific software required
High reliability and data integrity
– Non-volatile write journaling
– Physical disks not visible to OS or to application software
Low host CPU and PCI bus utilization
Fusion-MPT architecture provides processing power
– Shared memory architecture minimizes external memory requests
– Functionality is contained in device hardware and firmware
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