NEC N8403-019, Руководство пользователя

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5. Reconstruction
The reconstruction feature is used to change the configuration and/or RAID level of an existing virtual disk.
Reconstruction contains the following three features; however, the disk array controller supports "Migration
with addition" only.
5-1 Removed physical drive
Unsupported.
5-2 Migration only
Unsupported.
5-3 Migration with addition
Use this feature to add HDD
‟s to an existing virtual disk. In MSM, this feature is indicated as "Add Drive." The
execution patterns are as shown below:
Before execution After execution
Description
RAID level Number of
HDD’s
RAID level Number of
HDD’s
RAID0 1 RAID1 2 Capacity remains unchanged.
Notice
Note the following for the reconstruction:

Be sure to make a backup copy of data before starting reconstruction.

Reconstruction is disabled in a configuration where several virtual disks are defined in
one disk group

During reconstruction, the responsiveness of the server decreases due to high load.

Reconstruction is disabled for a degraded virtual disk. First, execute rebuild to recover
the virtual disk, and then execute reconstruction.

During reconstruction, do not shutdown or reboot the server. If the server is shutdown
accidentally due to power interruption, turn on the power as soon as possible.
Reconstruction is automatically restarted.