Volume Groups Overview Page

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  • SAN > Volume Groups
Manages the volume groups and the logical volumes that are configured on the Oracle FS System.

From this page you can create, modify, view, and delete volume groups and logical volumes. You can copy and clone the logical volumes. You can also change the QoS settings of any volume from standard to enhanced.

Note: A dash in a field signifies that the property does not apply to the volume.
Name

Lists the names of the logical volumes and the names of the volume groups that are configured on this Oracle FS System. If a logical volume belongs to a volume group, the volume is listed beneath that group.

Status
Identifies the accessibility of the logical volume.
LUNs
Valid states:
Online

Indicates that the volume is fully accessible.

Offline

Indicates that the volume is not accessible.

Conservative

Indicates that the write‑back cache of the volume is disabled, which reduces system performance. A Conservative state might indicate a hardware problem.

Prepared

Indicates that the storage resources for the volume are reserved for the clone, but the clone is not committed to the storage device.

Read Only

Indicates that the volume is in write protect mode and is set to read‑only.

Unknown

Indicates that not enough information is obtained from the volume to report its status.

Logical Capacity (GB)

Provides an overview of the logical capacity usage and the logical capacity requirements of the volume group.
Used
Indicates the amount of allocated capacity that is consumed.
  • For LUNs, this amount is the same as the allocated amount.

Allocated

Identifies the total amount of storage capacity that is reserved for this volume or this volume group.

Addressable

Identifies the capacity limit to which the volume can grow.

Distribution

Displays a graphical comparison of the allocated capacity that this volume uses to the unused allocated capacity.

Logical Maximum

Identifies the sum of the addressable capacity for the logical volume and its clone repository.

Capacity (GB) for Clone LUNs

Provides an overview of the physical capacity usage and the physical capacity requirements of any Clone LUNs that might exist in the volume group.
Physical Used

Identifies the amount of clone capacity that is allocated to the volume for clone data. The amount of capacity includes the overhead that is needed to create the logical volume. The overhead is parity for data protection.

Physical Allocated

Identifies the total amount of clone capacity that the system reserved for the logical volume. The amount of capacity includes the overhead that is needed to create the logical volume.

Physical Maximum

Identifies the maximum clone capacity allowed. For clones. This field identifies how much space is available for clone data.

 

RAID Level
Single parity

Indicates that, in addition to the actual data, one set of parity bits exists for the logical volume. This parity level protects against the loss of one drive. Single parity is implemented as a variant of the RAID 5 storage technology.

Double parity

Indicates that, in addition to the actual data, two sets of parity bits exist for the logical volume. This parity level protects against the loss of one or two drives with a slight cost to write performance. Double parity is implemented as a variant of the RAID 6 storage technology.

Mirrored

Indicates that no parity bits exist for the volume. Instead, the system writes the data in two different locations. This RAID level protects against the loss of at least one drive and possibly more drives with an improvement of the performance of random write operations. Mirrored RAID is implemented as a variant of the RAID 10 storage technology.

Note: For LUNs, the system displays the RAID levels that are in use by each LUN.
Priority Level
LUNs
Identifies the priority that the system gives to various operational aspects of a logical volume. These operational aspects include the Controller processing queue, the SAN interface requests, and the migration of the auto-tiered LUN extents.
Note: The processing-queue priority defines the percentage of the Controller CPU cycles that are dedicated to the volume.
Premium

Indicates the highest priority for responding to requests in the processing queue. For auto-tiered LUNs, busy LUN extents receive the highest priority when the system migrates the data to the higher-performing storage tiers.

High

Indicates the next highest priority for responding to requests in the processing queue. For auto-tiered LUNs, busy LUN extents receive the next highest priority when the system migrates the data to the higher-performing storage tiers.

Medium

Indicates an intermediate priority for responding to requests in the processing queue. For auto-tiered LUNs, busy LUN extents receive an intermediate priority when the system migrates the data to the higher-performing storage tiers.

Low

Indicates the next to lowest priority for responding to requests in the processing queue. For auto-tiered LUNs, busy LUN extents receive the next to lowest priority when the system migrates the data to the higher-performing storage tiers.

Archive

Indicates the lowest priority for responding to requests in the processing queue. For auto-tiered LUNs, busy LUN extents receive the lowest priority when the system migrates the data to the higher-performing storage tiers.