EXTENDS 20 YEARS OF SCSI TECHNOLOGY TO NEXT Y, Y. OVERVIEW
The LSI Logic Serial Attached SCSI (SAS) 3Gb/s integrated controller is based on Fusion-MPTTM (Message Passing Technology) architecture, the industry's leading high-performance interface technology. The LSISAS1068 eight-port controller provides 1.5 and 3Gb/s data transfer rates per port and enables Integrated RAID solutions in storage environments including servers and external storage systems. The LSI Logic SAS controller is ideal for today's data centers and leverages existing SCSI infrastructure for investment protection. The serial interface allows for point-to-point connection, increased device bandwidth, higher availability with dual ported drives, and enhanced reliability when compared to parallel SCSI. LSI Logic SAS controllers comply with the SAS standard which includes improved performance, simplified cabling, smaller connectors, a lower pin count, and lower power requirements. The eight-port controller provides an aggregate bandwidth of 2.4GB/s and also runs in full duplex. In addition, the LSI Logic SAS controllers leverage an electrical and physical connection interface that is compatible with Serial ATA technology. This provides users with unprecedented choices for servers and storage sub-systems. SAS controllers support command queuing to maximize drive performance. Interrupt coalescing is another advanced feature of the controllers that improves system performance by reducing the number of interrupts per I/O to less than one.
64-bit, 133MHz PCI-X host interface Backward compatible with 33/66 PCI Integrated controller solution 1.5 and 3Gb/s per port, full duplex 8-port controller Port independent auto-negotiation ARM 9 processor GigaBlaze integrated transceivers Point-to-point SAS/SATA drive connection Fusion-MPT architecture Supports SGPIO (SFF-8485) GflxTM technology RAID Levels Integrated MirroringTM and Integrated Striping Zero channel RAID support
The LSISAS1068 provides two serialized general purpose I/O (SGPIO) interfaces that are compliant with the SFF-8485 specification. The SGPIO interfaces enable the user to control LED pattern generation, device information, and general purpose data.
Hot plug/hot swap support Supports SSP, SMP, STP, and SATA protocols PCI power management D3hot, D3cold)
Supports 3.3V signaling levels Interrupt coalescing Independent power states per port Flash and local memory interface 636 EPBGA package
PCI-X Interface System Interface Fusion-MPT hardware layer
SAS Link Core SAS Link Core SAS Link Core SAS Link Core SAS Link Core SAS Link Core SAS Link Core
Figure 1. SAS controller block diagram Combined with LSI Logic SAS expanders, the controllers support topologies requiring greater connectivity within server and storage environments to 252 devices.
Windows Server 2003 Windows 2000 Windows XP LinuxTM RedHat 6.X, Suse, Turbo Solaris SPARCTM 7.X UnixWareTM NetWare
LSI Logic's Integrated RAID is a highly integrated, low cost RAID solution made possible by Fusion-MPT architecture. Integrated RAID is a processor-based, hardware RAID solution designed for system environments requiring redundancy and high availability where a full-featured RAID implementation is not desired or might be cost prohibitive. By providing RAID at the processor level, the host CPU is off-loaded allowing for more efficient operation. LSI Logic's advanced Integrated RAID includes Integrated MirroringTM and Integrated Striping options. Integrated Mirroring allows for fault tolerant, high availability data by simultaneously mirroring to 2 drives. It also extends mirroring capability to 8 drives for high-end applications, providing greater volume capacity. LSI Logic's write journaling feature allows for quick data recovery in the event of a failure by automatically verifying that all drives in the Integrated Mirroring volume are synchronized and have identical data. In the event of a system failure, an automatic resynchronization is performed in the background while
I/Os continue. Integrated Striping is ideal for today's data intensive applications, such as video streaming and document imaging, that require greater system performance and storage efficiency with reduced latency of the drives. LSI Logic's Integrated Striping supports to 8 drives. Integrated RAID is easy to install and configure. Other benefits include bootability, greater error protection, OS independence, and no need for special drivers.
Hardware based RAID Single virtual drive presented to OS Bootable OS independent Low host CPU utilization Supports drives of different types/capacities Simple configuration utility Error notification Non-volatile write journaling for mirroring Hot swap capability for mirroring Floating hot spare for additional fault tolerance for mirroring
Figure 2. SAS topology offers flexible link configuration and redundancy
The LSISAS1068 controller uses an ARM 9 processor for high performance, and to manage the Fusion-MPT interface and integrated RAID functions. This allows the host CPU to perform other processing activities while maximizing overall I/O performance. The controller manages I/Os from start to finish without host intervention.
The LSISAS1068 controller supports MB of external expansion ROM through an 8-bit interface. For ease of software development and field upgrades of the ROM, the interface supports local programming of FLASH memory. When utilizing LSI Logic's Integrated Mirroring, the addition of NVSRAM is required to support write journaling.