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Server RSV-S5 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.
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