IBM ServeRAID-MR10M User Manual page 20

1-4
This controller is based on the LSISAS1078 ROC device. This device is
compliant with the Fusion-MPT architecture and provides a PCI Express
x8 interface.
The controller integrates eight high-performance SAS/SATA II PHYs and
a PCI Express bus master DMA core. Each of the eight PHYs is capable
of 3.0 Gbit/s SAS link rates and 3.0 Gbit/s SATA II link rates.
The LSISAS1078 ROC device provides an eight-lane, 2.5-Gbit/s PCI
Express host interface, eight 3.0 Gbit/s SAS or SATA ports, and a full-
featured, hardware-based RAID implementation. The LSISAS1078 ROC
device integrates a high-speed DDR/DDR2 SDRAM interface with a
hardware RAID assist engine for parity calculations. The LSISAS1078
ROC device provides the maximum benefits of a RAID system and
enables you to configure the system to satisfy your system requirements.
The LSISAS1078 ROC device increases system performance and
provides fault-tolerant data storage. The LSISAS1078 supports data
striping across multiple disks, which reduces disk access time because
multiple disks simultaneously read or write data. The LSISAS1078 ROC
device backs up data with either data mirroring or a parity block. Either
backup method enables you to recover lost data in the event of a disk
failure. You can select the data backup method that best suits your
needs. A hardware RAID assist exclusive-OR (XOR) engine speeds
parity generation and checking and reduces system-access times.
The controller supports the SAS protocol as described in the Serial
Attached SCSI Standard, version 1.1. In addition, it supports the Serial
ATA II (SATA II) protocol defined by the Serial ATA Specification,
Version 1.0a, and the Serial ATA II; Extension to the Serial ATA
Specification, Version 1.1. SATA II is an extension to SATA 1.0a. The
controller supports the following SATA II features:
•
3 Gbit/s SATA II
•
Staggered spin-up
•
Hot plug
•
Native command queuing
•
Activity and fault indicators for each PHY
•
Port Selector (for dual-port drives)
Overview