An online virtual disk can be reconfigured in ways that expand its capacity and or changes its RAID level.
Online Capacity Expansion (OCE) can be done in two ways:
Free space can also be available when a disk group’s physical disks are replaced with larger disks using the Replace Member feature. A virtual disk's capacity can also be expanded by performing an OCE operation to add more physical disks.
RAID Level Migration (RLM) references changing a virtual disk’s RAID level. Both RLM and OCE can be done simultaneously so that a virtual disk can simultaneously have its RAID level changed and its capacity increased. When an RLM or OCE operation is complete, a reboot is not required. The source RAID level column indicates the virtual disk RAID level before the RLM or OCE operation. The target RAID level column indicates the RAID level after the RLM or OCE operation.
To extend a virtual disk, add a similar disk in the backplane and then reconfigure the virtual disk.
Reconfiguration can be done by following these steps:
Source RAID | Target RAID | Required Number of Physical Disks (Beginning) | Number of Physical Disks (End) | Capacity Expansion Possible | Description |
---|---|---|---|---|---|
RAID 0 | RAID 0 | 1 | 2 or more | Yes | Increases capacity |
RAID 0 | RAID 1 | 1 | 2 | No | Converts nonredundant virtual disk into a mirrored virtual disk by adding one disk |
RAID 0 | RAID 5 | 1 or more | 3 or more | Yes | At least one drive must be added for distributed parity data. |
RAID 0 | RAID 6 | 1 or more | 4 or more | Yes | At least two drives must be added for dual distributed parity data. |
RAID 1 | RAID 0 | 2 | 2 or more | Yes | Removes redundancy while increasing capacity |
RAID 1 | RAID 5 | 2 | 3 or more | Yes | Maintains redundancy while doubling capacity |
RAID 1 | RAID 6 | 2 | 4 or more | Yes | Two drives must be added for distributed parity data. |
RAID 5 | RAID 0 | 3 or more | 3 or more | Yes | Converts to a nonredundant virtual disk and reclaims disk space that is used for distributed parity data. |
RAID 5 | RAID 5 | 3 | 4 or more | Yes | Increases capacity by adding disks |
RAID 5 | RAID 6 | 3 or more | 4 or more | Yes | At least one drive must be added for dual distributed parity data. |
RAID 6 | RAID 0 | 4 or more | 4 or more | Yes | Converts to a nonredundant virtual disk and reclaims disk space that is used for distributed parity data. |
RAID 6 | RAID 5 | 4 or more | 4 or more | Yes | Removes one set of parity data and reclaims the disk space that is used for it. |
RAID 6 | RAID 6 | 4 | 5 or more | Yes | Increases capacity by adding disks |
RAID 10 | RAID 10 | Less than 32 | 32 | Yes | Increases capacity by adding disks |
Duration: 00:01:22 (hh:mm:ss)
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