NEC Express5800 series User Manual page 56

4-12
Configuring Your Storage and I/O Blade
IMPORTANT:
Be sure to make backup copy of data and perform Consistency
Check before starting Reconstruction.
The Reconstruction is disabled in the configuration where several
virtual disks are defined in one disk group
During Reconstruction, the processing rate is decreased due to much
load.
The Reconstruction can be performed for the degraded or partially
degraded virtual disk. However, it is recommended to execute
Rebuild to recover the virtual disk, then execute Reconstruction.
During Reconstruction, do not shutdown or reboot the CPU blade
connected with this Storage and I/O Blade. If the CPU blade is
shutdown by an unforeseen accident such as power interruption,
turn on the power again as soon as possible. The Reconstruction is
automatically restarted.
In some configuration, Background Initialize may start
automatically upon completion of 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
Note the following for the Reconstruction:
Virtual disk (RAID5)
36GB 36GB
Virtual disk (RAID5)
36GB 36GB
36GB
Execute Migration with addition
36GB
[Before execution]
Capacity = 72GB
[After execution]
Capacity = 108GB