4.2.7 RAID GROUPS OVERVIEW

Server RSV-S8

User Manual

 

 

 

 

 

 

4.2.7 RAID GROUPS OVERVIEW

RAID Groups allow Enter values in all fields and click Create to create the RAID Group.

FIELD

DEFINITION

RAID Group Label

Enter an identifiable name for the RAID group. This value can be any string (up to 8

 

characters including blank spaces) to help users identify this volume.

 

 

RAID Group

Select a Group ID from the available ID list. The maximum number of RAID Groups per

 

controller is 8, so Group ID can be any number between 0 and 7, inclusive.

 

 

Configuration

Select which RAID level is to be used to configure these members:

 

• Contiguous (for virtual disk).

 

• Concatenated (for multiple concatenated segments).

 

• Striped (for RAID 0)

 

• Mirrored (for RAID 1)

 

• Mirrored Striped (for RAID 10)

 

• Parity RAID (for RAID 5)

 

 

Capacity

Select a value to define the total usable capacity of the RAID Group or manually enter

 

the volume size in gigabytes (GB). Selecting MAX will create the largest RAID set

 

possible with the drive(s) selected.

 

 

Chunk Size

Select a value to define the chunk size (stripe size) for performance tuning. In general,

 

large stripe sizes are best for large files that are accessed sequentially (for example,

 

media streaming files) and smaller sizes are better for randomly accessed data like

 

databases. This parameter is not used for Contiguous (JBOD), Concatenated, and

 

Mirrored configurations.

 

 

Rebuild Priority

Select a value to identify how quickly the controller should rebuild data on a disk after a

 

hardware failure. A value of 1 is the lowest priority and will take the longest to rebuild. A

 

value of 10 is the highest priority and will rebuild the fastest, but may require more CPU

 

resources, which might affect the computer’s performance. This parameter is not used

 

for Contiguous (JBOD), Concatenated, and Striped configurations.

 

 

Check Pointing

Click the On or Off button to enable or disable the Check Pointing feature. When Check

 

Pointing is enabled, restoring data is very fast after an unexpected power loss, although

 

normal performance may be slightly reduced. When Check Pointing is disabled, normal

 

performance is improved, but restores can take a long time to complete. This selection

 

is only available when the selected RAID configuration is Mirrored, Mirrored Striped or

 

Parity RAID, and the “Advanced RAID Features” checkbox in the

 

Configuration/Advanced Options dialog is checked.

 

 

Parity

Click the On or Off button to enable or disable the ability to return “dirty” data after an

 

unexpected power loss and all of the data could not be written to disk, rather than

 

taking the volume off-line. This selection is only available when the selected RAID

 

configuration is Parity RAID and the “Advanced RAID Features” checkbox in the

 

Configuration/Advanced Options dialog is checked.

 

 

Devices

Select the RAID member devices from the available device segment grid. Up to five

 

members can be selected for Contiguous, Concatenated, Mirrored, Striped or Parity

 

RAID modes (although Mirrored RAID Groups will typically contain only two members).

 

Exactly four members must be selected for Mirrored Striped mode.

 

 

RAID Level

Min # of Disks

 

 

02

12

5

3*

10

*

4

 

Contiguous

1

 

 

Concatenated

1

Once all parameters have been selected, select “Create” to create the RAID Group. When finished, press Cancel to exit the Create RAID Group Dialog.

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Rosewill RSV-S8 user manual Raid Groups Overview, Field, Definition, RAID Level, Min # of Disks