Users Guide

ManualsBrandsDell ManualsConverged InfrastructurePowerEdge RAID Controller H310

NOTE: Reconfiguring Virtual Disks typically impacts disk performance until the reconfiguration

operation is complete.

Online Capacity Expansion (OCE) can be done in two ways:

• If there is a single virtual disk in a disk group and free space is available, the virtual disk’s capacity can

be expanded within that free space.

• If a virtual disk is created and it does not use the maximum size of the disk group, free space is

available.

Free space is also available when a disk group’s physical disks are replaced by 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) refers to changing a virtual disk’s RAID level. Both RLM and OCE can be done

at the same time so that a virtual disk can simultaneously have its RAID level changed and its capacity

increased. When a RLM/OCE operation is complete, a reboot is not required. See the following table for a

list of RLM/OCE possibilities. The source RAID level column indicates the virtual disk RAID level before the

RLM/OCE and the target RAID level column indicates the RAID level after the operation has completed.

NOTE: If the controller already contains the maximum number of virtual disks, you cannot perform

a RAID level migration or capacity expansion on any virtual disk.

NOTE: The controller changes the write cache policy of all virtual disks undergoing a RLM/OCE to

Write-Through until the RLM/OCE is complete.

Table 3. RAID Level Migration

Source RAID

Level

Target RAID

Level

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 by

adding disks

RAID 0 RAID 1 1 2 No Converts non-

redundant

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

disk needs to

be added for

distributed

parity data.

RAID 0 RAID 6 1 or more 4 or more Yes At least two

disks need to

be added for

dual distributed

parity data.