Bull Cedoc NovaScale R440 E2, User Manual, Page: 144 / 552

4-50 Configuring Your Server
IMPORTANT: Note the following regarding the Reconstruction feature:
„
Be sure to make backup copy of data and perform a Consistency Check before starting the
Reconstruction.
„
The Reconstruction is disabled in the configuration where several virtual disks are defined in
one disk group.
„
During the Reconstruction process, the processing rate is decreased due to the high load.
„
The Reconstruction can be performed for the degraded or partially degraded virtual disk.
However, it is recommended to execute a Rebuild to recover the virtual disk, then execute a
Reconstruction.
„
During the Reconstruction process, do not shut down or reboot the server. If the server is shut
down by an unforeseen accident such as power interruption, turn on the power again as soon as
possible. The Reconstruction is automatically restarted.
„
In some configurations, the Background Initialize process may start automatically once the
Reconstruction is completed.
Ex: Migration with addition for a RAID5 virtual disk
The figure below shows an example of adding a single 36GB HDD to a RAID5 virtual disk configured with three 36GB
HDDs.
36GB 36GB 36GB
[Before execution]
Capacity = 72GB
Virtual disk (RAID5)
36GB
36GB 36GB 36GB
36GB
Execute Migration with addition
Virtual disk (RAID5)
[After execution]
Capacity = 108GB