# Dataset Group Details Volume

Use the Dataset Group Details Volume attributes to view detailed information on the data set of a volume.

Allocation Flag: The data set volume flags. The following are valid values:

- CANDIDATE VOLUME
- CANDIDATE VOLUME\CATALOG ENTRY ONLY
- CANDIDATE VOLUME\OVERFLOW VOLUME
- CANDIDATE VOLUME\OVERFLOW VOLUME\CATALOG ENTRY ONLY
- CATALOG ENTRY ONLY
- OVERFLOW VOLUME
- OVERFLOW VOLUME\CATALOG ENTRY ONLY
- PRIMARY VOLUME
- PRIMARY VOLUME\CANDIDATE VOLUME
- PRIMARY VOLUME\CANDIDATE VOLUME\CATALOG ENTRY ONLY
- PRIMARY VOLUME\CATALOG ENTRY ONLY
- PRIMARY VOLUME\INDIRECT
- PRIMARY VOLUME\OVERFLOW VOLUME
- PRIMARY VOLUME\OVERFLOW VOLUME\CATALOG ENTRY ONLY
- PRIMARY VOLUME\ SYMBOLIC
- n/a

Associated Entry Name: The associated entry name. (Example: VSAM Cluster component.)

Average MSR: The average MSR (millisecond response time) for the data set on this volume. You can enable aggregation for this attribute in Tivoli® Data Warehouse.

Dataset Group Name: A user-defined name that identifies a group of data set name masks that comprise the Dataset Group.

Dataset Name: The name of the data set for which the information was collected.

Extended Address Space Eligible: Data set is eligible to use Extended Address Space of an Extended Address Volume.

Extents: The number of extents for this data set.

GDG Generation Level: The Dataset Generation Group Level.

Managed System: An internal node name used to identify the system from which this row of data was obtained.

Percent Free: The percentage of tracks free for this data set on this volume. This is calculated using this formula: `(Tracks Allocated - Tracks Free ) / Tracks Free`

Percent Used: The percentage of tracks used for this data set on this volume. This is calculated using this formula: `(Tracks Allocated - Tracks used ) / Tracks Used`

Physical Block Size: The number of bytes per track.

Request Type: Request type.

Sequence Number: Identifies the file sequence number.

Sequence Order: The sequence order of the volume.

SMFID: The SMFID of the system where the data was collected.

Timestamp: The time stamp of when the data was collected.

Total I/Os: The total I/Os for this data set on this volume. You can enable aggregation for this attribute in Tivoli Data Warehouse.

Tracks Allocated: The number of tracks allocated by this data set on this volume. You can enable aggregation for this attribute in Tivoli Data Warehouse.

Tracks Free: The number of tracks free for this data set on this volume. This is calculated using: Tracks Allocated - Tracks Used.

Tracks Used: The number of tracks used by this data set on this volume. You can enable aggregation for this attribute in Tivoli Data Warehouse.

Using Cylinder Managed Space: Dataset is using Cylinder Managed Space on an Extended Address Volume.

Volume: The Volume Serial Number for primary or candidate space allocation.

VSAM Associated Entry Name: The name of the VSAM Dataset Associated entry. For example, VSAM Cluster component.

VSAM High Allocation RBA: The VSAM high-allocated Relative Byte Address.

VSAM High CI RBA: The VSAM Relative Byte Address data control interval with high key.

VSAM High Used RBA: The VSAM high-used Relative Byte Address.

VSAM Percent Free: The percentage of space that is free in this VSAM data set. This is calculated using: `(High Allocated RBA - High Used RBA) \ High Allocated RBA`.

VSAM Percent Used: The percentage of space that is used in this VSAM data set. This is calculated using: `High Used RBA \ High Allocated RBA`.