NEC Express5800 Series Maintenance Manual page 152

Chapter 2 Useful Features
(4)
Reconstruction
The reconstruction feature is used to change configuration and/or RAID level of existing Virtual Drive (VD). The
Reconstruction contains the following three features, however, the RAID controller supports "Migration with
addition" only.
(a) Reconstruction execution pattern
Use this feature to add Physical Devices to existing Virtual Drive (VD). The execution patterns are as shown
below ( : Number of Physical Devices to be added).
Before execution
RAID level
Physical Devices
RAID0 X
RAID0 1
152
Important
You can use HII for Reconstruction. URU does not support Reconstruction.
This RAID controller does not support the Expand feature.
After execution
Number of
RAID level
RAID0
RAID1
Important

Be sure to make backup copy of data and perform Consistency Check
before starting Reconstruction.

You cannot perform Reconstruction on the configuration where several
VDs are defined in one DG.

During Reconstruction, the processing rate is decreased due to much
load.

Reconstruction can be performed for the degraded or partially degraded
VD. However, it is recommended to execute Rebuild to recover the VD,
then execute Reconstruction.

During Reconstruction, do not shutdown or reboot the server.
Express5800/B120f Maintenance Guide
Number of
Physical Devices
Capacity increased: Equivalent to α Physical
x + 
Devices
2 Capacity remains unchanged.
4. RAID System Configuration
Description