# DASD Group Volume Space

The DASD Group Volume Space provides information about the volumes and associated metrics that are in the DASD Group Volume Space workspace.

Allocated Space Megabytes: The amount of space, in megabytes, on this volume which is currently allocated to datasets.

Cu Model: The model indicator for this device's control unit.

Cylinder Managed Space: The space on the volume, beginning at cylinder address 65520, is managed only in multicylinder units.

Device Address: Four hexadecimal digits that define the physical address of this device. Also known as unit or unit address.

Device Model: The model indicator for this device.

Device Type: The device model. Possible values include 3380 and 3390.

Extended Address Volume: The volume has more than 65520 cylinders and is an Extended Address Volume.

Fragmentation Index: A measure of the degree to which free space on the volume is fragmented. The higher the number, the more severe the fragmentation.

Free DSCBs: The number of DSCBs in the VTOC of this volume which are unused.

Free Extents: The total number of free areas on this volume.

Free Space Megabytes: Amount of free space on this volume in megabytes.

Free VTOC Index Records: The number of index records in the VTOC index which are available for use.

Largest Free Extent MB: The size, in megabytes, of the largest contiguous free area on the volume.

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

Maximum Free Cylinders: The largest contiguous area of free cylinders on this device.

Maximum Free Tracks: The number of additional free tracks in the extent which contains the Maximum Free Cylinders.

Percent Free Space: Portion of this volume which is currently unused, expressed as a percentage.

SMS Conversion Status: SMS conversion status of this volume (non-SMS, initial, converted, or excluded).

SMS Status: The SMS status of this volume (enabled, quiesced_all, quiesced_new, disabled_all, or disabled_new).

Solid State Device: An indication of whether the logical volume is backed by a solid state physical device.

Storage Group Name: The name of the SMS storage group to which this volume belongs.

Time Stamp: The name of the user-defined group of DASD volumes to which this volume belongs.

Total Capacity Megabytes: The data capacity of this volume in megabytes.

Total Free Cylinders: The total number of unallocated whole cylinders on this volume.

Total Free Tracks: The total number of free tracks which are not contained the total number of free whole cylinders.

Track Managed Free Cylinders: The total number of unallocated whole cylinders in the track managed area on this volume.

Track Managed Free Extents: The total number of free extents in the track managed area on this volume.

Track Managed Free Space: Amount of free space in the track managed area on this volume in megabytes.

Track Managed Free Tracks: The number of additional free tracks in the extent which contains the free cylinders.

Track Managed Fragmentation Index: A measure of the degree to which free space in the track managed area on the volume is fragmented.The higher the number, the more severe the track managed area fragmentation.

Track Managed Maximum Free Cylinders: The largest contiguous area of free cylinders in the track managed area on this device.

Track Managed Maximum Free Tracks: The number of additional free tracks in the extent which contains the maximum free cylinders.

Track Managed Largest Free Extent: The size, in megabytes, of the largest contiguous free area in the track managed area on the volume.

Track Managed Percent Free: The portion of the track managed area on this volume which is currently unused, expressed as a percentage.

Track Managed Total Capacity: Data capacity of the track managed area on this volume in megabytes.

User Group Name: The name of the user-defined group of DASD volumes to which this volume belongs.

Volume: This is the volume serial number of a disk device currently in use by this application.

VTOC Index Status: The status of the VTOC index on this volume (enabled, disabled, error, OS-VTOC, or exclude).