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User Guide
108
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Background Initialize
The Background Initialize is automatically executed when a RAID5 virtual disk is
created in the disk group including five or more HDDs.
The Background Initialize performs the parity generation processing in the background
of the area not initialized. This process is equivalent to a Consistency Check.
The Background Initialize is not performed in the following cases.
■
A Full Initialize has already been executed and completed normally before
executing a Background Initialize.
(*) Full Initialize clears the entire area of a virtual disk with "0".
■
A Consistency Check has already been executed and completed normally before
executing a Background Initialize.
■
A Rebuild has already been executed and completed normally before executing a
Background Initialize (for RAID5 only).
“Yes" is specified for "Disable BGI" in VD Definition.
■
The Virtual disk is in degraded or offline state.
A Background Initialize is performed if the virtual disk of RAID6 is partially
degraded.
The Background Initialize is executed again if any of the following cases occurred in
the virtual disk on which a Background Initialize was already completed.
■
When the virtual disk is degraded or offline, the offline HDD is put Online, and the
virtual disk state becomes Optimal.
■
When you replace the RAID Controller.
■
When you execute a Reconstruction to an existing virtual disk to make a RAID5
VD with five or more HDDs.
Note the following for Background Initialize:
■
During Background Initialize, the processing rate is
decreased due to the high load.
■
Background Initialize will resume a few minutes later if it is
interrupted.