Reconstruction; Removed Physical Drive; Migration Only; Migration With Addition - NEC N8103-91 User Manual

5. Reconstruction

The reconstruction feature is used to change configuration and/or RAID level of existing
virtual disk. The 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 HDDs to existing virtual disk. On MSM, this feature is indicated as
"Add Drive". The execution patterns are as shown below ( : Number of HDDs to be
added).
Before execution
Number
RAID level
of HDDs
RAID0 x
RAID0 1
RAID0 x
RAID1 2
RAID1 2
RAID5 x
RAID5 x
After execution
Number
RAID level
of HDDs
RAID0
x+
RAID1 2
RAID5
x+
RAID0
2+
RAID5
2+
RAID0
x+
RAID5
x+α
Description
Capacity increased: equivalent to
Capacity remains unchanged.
Capacity increased: equivalent to -1 HDDs
Capacity increased: equivalent to +1 HDDs
Capacity increased: equivalent to
Capacity increased: equivalent to +1 HDDs
Capacity increased: equivalent to
99
HDDs
HDDs
HDDs