IBM ServeRAID-MR10is, User Manual

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Configuration Scenarios 1-5
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 ServeRAID-MR10is controller supports the SAS protocol as
described in the
Serial Attached SCSI Standard , version 1.1 . The
controller also supports the Serial ATA II (SATA II) protocol defined by
the
Serial ATA Specification, Version 1.0a , and the Serial ATAII;
Extension to the Serial ATA Specification, Version 1.1 . SATA II is an
extension to SATA 1.0a. In addition, 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)
Each port on the ServeRAID-MR10is controller supports SAS devices,
SATA II devices, or both using SSP, SMP, STP, and SATA II. SSP
enables communication with other SAS devices. SATA II enables the
controller to communicate with other SATA II devices.
1.4 Configuration Scenarios
There are two main scenarios in which you can use the ServeRAID-
MR10is controller:
•
Low-end, internal SATA II configuration: In this configuration, use
the RAID controller as a high-end SATA II compatible controller that
connects up to eight disks either directly or through a port expander.
This configuration is mostly for low-end or entry servers. Enclosure
management is provided through out-of-band I
2
C bus. Side bands of
both types of internal SAS connectors support the SFF-8485
(SGPIO) interface.