IBM ServeRAID M5025, User Manual

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ServeRAID M5025 SAS/SATA Controller User’s Guide 3-1
Chapter 3
ServeRAID M5025
SAS/SATA Controller
Characteristics
This chapter describes the characteristics of the ServeRAID M5025
SAS/SATA controller. It consists of the following sections:

Section 3.1, “ServeRAID M5025 SAS/SATA Controller”

Section 3.2, “ServeRAID M5025 SAS/SATA Controller
Characteristics”

Section 3.3, “Technical Specifications”
3.1 ServeRAID M5025 SAS/SATA Controller
The ServeRAID M5025 SAS/SATA controller is a dual PHY, SAS
PCI Express adapter and is used in a system with a PCI Express slot
.
PCI Express goes beyond the PCI specification in that it is intended as
a unifying I/O architecture for various systems: desktops, workstations,
mobile, server,
communications, and embedded devices.
The ServeRAID M5025 controller has one LSISAS2108 ROC (RAID-on-
chip) processor that controls eight external SAS/SATA ports through two
x4 SAS external connectors.
3.1.1 Board Layout and Connector Information
This subsection provides the board layout and connector information for
the ServeRAID M5025 controller. The following subsections provide
graphics and connector information for the controller.
The controller has eight external SAS/SATA connectors. Figure 3.1
displays the connectors on the controller, while Table 3.1 describes
them.