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RAID Functionality and Features Intel® Integrated RAID Module SROMBSASMR (AXXROMBSASMR) Technical Product Specification
4. RAID Functionality and Features
4.1 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.
4.1.1 RAID Physical Drive Status
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
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