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Operational States of an Intel RAID Controller SRCU31
Firmware Disk Array
Operational States for RAID 4/5
An array drive under the Intel RAID Controller SRCU31 firmware operating system can assume
seven different operational states: Idle, Ready, Fail, Build, Rebuild, Expand, and Error. Table 9
describes the operational states for RAID 4/5 while Figure 7 is the operational state diagram for
RAID 4/5. Table 10 describes additional operational states.
Table 9.
Operational States for RAID 4/5
State
Idle State
Build State
Ready State
Fail State
Rebuild State
Expand State
34
Description
This state is characterized by the fact that the redundant information of the disk
array has never been entirely created. The disk array is in this state after its first
configuration and until you quit Storage Console (StorCon). Should an error occur
while the array is in the build state, the array returns to the Idle state (exception: if
during build state the dedicated drive of RAID 4 fails, the state changes to fail.
After the disk array has been configured for the first time, it assumes the build state
as soon as you quit StorCon. While the array is in the Build state, redundancy
information is calculated and stored to the hard disk drives of the array.
The disk array is fully operational when in the Ready state. All redundant
information is present, that is, a hard disk drive can fail without impairing the
functionality of the disk array. This is the normal state of a disk array. The state
ready/expand indicates that the RAID level and/or capacity are currently
migrated/expanded.
The disk array changes to the fail state whenever a Logical Drive fails.
Redundancy information is still present, thus allowing the remaining hard disk
drives to continue working. This state should be eliminated as soon as possible by
replacing the defective hard disk drive. If a so-called Hot Fix drive has previously
been assigned to a disk array with StorCon, the controller will automatically replace
the defective drive and start the reconstruction of the data and the redundant
information. Therefore, under these circumstances the fail state is only temporary
and will be eliminated by the controller itself.
The disk array will assume this state after the automatic activation of a Hot Fix
drive or after a manual replacement is carried out with StorCon. The data and the
redundant information are reconstructed and stored to the new drive.
If the capacity or RAID level of an existing disk array is changed, the disk array
changes its state into expand. As soon as the expansion or migration is
completed, the state changes back to ready.
Intel RAID SRCU31 Users Guide
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