Support For Non-Hard Disk Drive Devices; Enclosure Management Support; Raid Functionality And Features; Hierarchy - Intel RMS25PB080 Hardware User's Manual

Support for Non-Hard Disk Drive Devices

Selected non-hard drive devices are supported for use with this module. For information
on support for non-hard drive devices, see this RAID module's Tested Hardware and
Operating System List.

Enclosure Management Support

The Intel
RMS25CB040 support the internal SAS sideband signal SFF-8485 (SGPIO) enclosure
management interface.

RAID Functionality and Features

Hierarchy

The fundamental purpose of a RAID system is to present a usable data storage medium
(virtual drive) with some level of redundancy to a host operating system. The Intel
RAID firmware is based on the concept of associating physical drives in arrays and then
creating a virtual drive from that array that includes a functional RAID level. To create a
virtual drive and present it to the host operating system, the RAID firmware typically
follows these steps:
1. One or more physical drives are selected and associated as an array.
2. One or more arrays are associated and given a RAID level. This process creates a
virtual drive and provides an option to initialize the virtual drive.
3. The RAID firmware presents the virtual drive to the operating system.
RAID Physical Drive Status
Drive State
Unconfigured Good
Online
Hot Spare
Failed
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Integrated RAID Module RMS25PB080, RMS25PB040, RMS25CB080 and

Table 11. RAID Physical Drive Status

Code
Unconfigured Good The drive is functioning normally, but is not part of a
ONLN
HOTSP
FAILED
Intel® Integrated RAID Module RMS25PB0x0 and RMS25CB0x0 Hardware User's Guide
Description
configured virtual drive and is not a hot spare.
The drive is online, is part of a configured
virtual drive, and is functioning normally.
A physical drive that is configured as a hot spare.
A physical drive that was originally configured as
Online or Hot Spare, but on which the firmware
detects an unrecoverable error.
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