IBM ServeRAID M5014, User Manual

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1-4 Overview
•
You cannot mix Solid State SAS drives and Solid State SATA drives
in the same virtual disk
•
See Section 3.3.4, “Power Supply Requirements for the ServeRAID
M5014/M5015 Controllers,” for information about the power
requirements, and Section 3.3.5, “Operating and Non-operating
Conditions” for information about the minimum and maximum
temperature ranges.
1.3 General Description
The ServeRAID M5014 and ServeRAID M5015 controllers bring 6.0 Gb/s
Serial Attached SCSI and 3.0 Gb/s Serial ATA II performance to host
adapter, workstation, and server designs. The controllers support internal
storage devices, which allows you to use a system that supports
enterprise-class SAS drives, and desktop-class SATA II drives. Both
controllers can connect to drives directly. Simplified cabling between
devices is an additional benefit.
The controllers are based on the LSISAS2108 ROC device. This device
is compliant with the Fusion-MPT architecture and provides a PCI
Express x8 interface.
The controllers integrate eight high-performance SAS/SATA II PHYs and
a PCI Express bus master DMA core. Each of the eight PHYs is capable
of 6.0 Gb/s SAS link rates and 3.0 Gb/s SATA II link rates.
The LSISAS2108 ROC device provides an eight-lane, 5-Gb/s PCI
Express host interface, eight 6.0 Gb/s SAS or 3.0 Gb/s SATA ports, and
a full-featured, hardware-based RAID implementation. The LSISAS2108
ROC device integrates a high-speed DDR/DDR2 SDRAM interface with
a hardware RAID assist engine for parity calculations. The LSISAS2108
ROC device provides the maximum benefits of a RAID system and
enables you to configure the system to satisfy your system requirements.
The LSISAS2108 ROC device increases system performance and
provides fault-tolerant data storage. The LSISAS2108 supports data
striping across multiple disks, which reduces disk access time because
multiple disks simultaneously read or write data. The LSISAS2108 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