NEC SigmaBlade B140a-T Guide de l'utilisateur télécharger pdf (Page 89)

Configuring Your Server 4-37

Migration with addition

Use this feature to add HDDs to existing virtual disk. The execution patterns are as shown below (α:

Number of HDDs to be added).

Before execution After execution

RAID

level

Number of

HDDs

RAID

level

Number of

HDDs

Description

RAID0 x RAID0

x+α Capacity increased: equivalent to α HDDs

RAID0 1 RAID1 2 Capacity remains unchanged.

RAID0 x RAID5

x+α Capacity increased: equivalent to α-1 HDDs

RAID1 2 RAID0

2+α Capacity increased: equivalent to α+1 HDDs

RAID1 2 RAID5

2+α Capacity increased: equivalent to α HDDs

RAID5 x RAID0

x+α Capacity increased: equivalent to α+1 HDDs

RAID5 x RAID5

x+α Capacity increased: equivalent to α HDDs

IMPORTANT: Note the following for the Reconstruction:

 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 server. If the

server is shutdown by an unforeseen accident such as power

interruption, turn on the power again as soon as possible. The

Reconstruction is automatically restarted.

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NEC SigmaBlade B140a-T Guide de l'utilisateur Page 89