Server | User Manual | |
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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. |
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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. |
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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) |
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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. |
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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. |
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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. |
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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. |
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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 |
| configuration is Parity RAID and the “Advanced RAID Features” checkbox in the |
| Configuration/Advanced Options dialog is checked. |
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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. |
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RAID Level | Min # of Disks |
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12
5 | 3* | |
10 | * | |
4 | ||
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Contiguous | 1 | |
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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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