LSISAS1064E PCI Express to 4-Port Serial Attached SCSI Controller 3 of 30
DB08-000275-03 May 2006 - Version 2.0 Copyright © 2004–2006 by LSI Logic Corporation. All rights reserved.
The SAS interface uses the proven SCSI command set to ensure reliable
data transfers, while providing the connectivity and flexibility of
point-to-point serial data transfers. The SAS interface provides improved
performance, simplified cabling, smaller connectors, lower pin count, and
lower power requirements when compared to parallel SCSI. SAS
controllers leverage an electrical and physical connection interface that
is compatible with SATA technology.
The LSISAS1064E supports the Integrated RAID solution, which is a
highly integrated, low cost RAID implementation. It is designed for
systems requiring redundancy and high availability, but not needing a
full-featured RAID implementation. Integrated RAID technology supports
up to two volumes and ten drives. Each volume can contain up to eight
drives. The Integrated RAID solution includes Integrated Mirroring™(IM)
technology, Integrated Mirroring Enhanced (IME), and
Integrated Striping™(IS) technology. IM provides physical mirroring of
two physical drives, plus a hot spare drive. IME supports 3–8 drives plus
a hot spare drive. IM and IME require an NVSRAM to support write
journaling. IS enables data striping across up to eight physical drives.
The Integrated RAID solution is OS independent, easy to install and
configure, supports up to eight drives at RAID Level 0, and does not
require a special driver. The run-time operation of the Integrated RAID
solution is transparent to the operating system. A single firmware build
supports all Integrated RAID capabilities.
The LSISAS1064E uses the Fusion-MPT architecture, which features a
performance based message passing protocol that offloads the host
CPU by completely managing all I/Os and minimizes system bus
overhead by coalescing interrupts. The proven Fusion-MPT architecture
requires only thin, easy-to-develop device drivers that are independent of
the I/O bus. LSI Logic provides these device drivers.
To meet its flexibility and data transfer requirements, the LSISAS1064E
uses an ARM966 processor that operates at 225 MHz. LSI manufactures
the LSISAS1064E using Gflx™technology.