Intel SROMBSASMR (AXXROMBSASMR) 4. RAID Functionality and Features

RAID Functionality and Features Intel® Integrated RAID Module SROMBSASMR (AXXROMBSASMR) Technical Product Specification

4. RAID Functionality and Features

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.

Table 10. RAID Physical Drive Status

Drive State Code Description

Unconfigured

Good

Unconfigured Good The drive is functioning normally, but is not part of a configured virtual

drive and is not a hot spare.

Online ONLN The drive is online, is part of a configured virtual drive, and is functioning

normally.

Hot Spare HOTSP A physical drive that is configured as a hot spare.

Failed FAILED A physical drive that was originally configured as Online or Hot Spare, but

on which the firmware detects an unrecoverable error.

Rebuilding REBUILD A physical drive to which data is being written to restore full redundancy for

a virtual disk.

Unconfigured

Bad

Unconfigured Bad A physical drive on which the firmware detects an unrecoverable error; the

physical drive was Unconfigured Good or the physical drive could not be

initialized.

Missing Missing A physical drive that was Online, but which has been removed from its

location.

Offline Offline A physical drive that is part of a virtual drive but which has invalid data as

far as the RAID configuration is concerned.

None None A physical drive with an unsupported flag set. An Unconfigured Good or

Offline physical drive that has completed the preparation for removal

operation.

Revision 1.2

Intel order number E59029-003