User`s guide

4-27
IMPORTANT: Note the following for the Reconstruction:
 Be sure to make a backup copy of the data and to perform a Consistency Check before
starting the Reconstruction.
 The Reconstruction is disabled in a configuration where several virtual disks are defined
in one disk group.
 During Reconstruction, the processing rate is decreased due to the high load.
 The Reconstruction can be performed for a degraded or partially degraded virtual disk.
However, it is recommended to execute a Rebuild to recover the virtual disk, then to
execute the Reconstruction.
 During the Reconstruction, do not shutdown or reboot the server. If the server is
shutdown by an unforeseen accident such as a power interruption, turn on the power
again as soon as possible. The Reconstruction restarts automatically.
 In some configurations, the Background Initialize may start automatically upon the
completion of the Reconstruction.
Ex: Migration with addition for 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