# Tape Device

The Tape Device attributes provide status information about the tape devices in a tape group. A tape group is the set of devices in an IBM® ATL, VTS, or the generic device type.

Device Address: The four hexadecimal digits that define a physical device. Also known as unit or unit address.

Device Status: The device status, including ONLINE, OFFLINE, ALLOCATED, or MOUNT PENDING.

Device Type: The generic tape drive type. Examples include 3480 and 3490.

Group Name: An OMEGAMON® XE convention for identifying logical groupings of tapes by library of device. Tape subsystems that group volumes and devices using a library dataserver are considered libraries. All other devices are grouped by device considered non-library or NO LIB. Each tape library is considered to be a tape group whose name is the same as the library name.

I/O Count: The count of I/O operations by this drive during this interval. You can enable aggregation for this attribute in Tivoli® Data Warehouse.

I/O Per Second: The number of I/O operations by the device during this interval. You can enable aggregation for this attribute in Tivoli Data Warehouse.

Jobname: The name of the job to which the tape drive is currently allocated.

Managed System: The SMS name of this system.

Mount Pending Time: The amount of time in minutes that a device has been in MOUNT PENDING status. You can enable aggregation for this attribute in Tivoli Data Warehouse.

Permanent Errors: The number of permanent read or write errors that the device has incurred. You can enable aggregation for this attribute in Tivoli Data Warehouse.

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

Temporary Errors: The number of temporary read and write errors that the device has incurred. You can enable aggregation for this attribute in Tivoli Data Warehouse.

Volume: The volume serial number of the tape mounted or being mounted on the drive.