Tape Drives Attributes

The Tape Drives Attribute Group provides information about various factors that affect the performance and availability of the tape drives on your system.

Address The device address. Valid value is a 2-byte integer displayed as a hexadecimal value.

DDR Swaps in Progress The number of Dynamic Device Reconfiguration (DDR) swaps in progress. DDR permits tapes to be remounted on another drive without ABENDing a running job. However, if not acted upon promptly, DDR may create severe system I/O performance degradation, since all I/O allocations must wait until the DDR swap is completed. Valid value is a 4-byte integer.

Dropped Ready The number of devices in a dropped ready condition. Valid value is a 4-byte integer.

I/O Count The count of I/O operations for this device since it was mounted. Valid value is a 4-byte integer.

Managed System An z/OS operating system in your enterprise that CandleNet Portal is monitoring. Valid value is a character string with a maximum length of 32 bytes.

Not Responding The number of tape drives that have not responded to an I/O request. Valid value is a 4-byte integer.

Permanent Errors The number of permanent, nonrecoverable I/O errors that have occurred for this device. Valid value is a 4-byte integer.

Status The status of the device. Valid values are:

Tape Mounts Pending The number of tape drives waiting for a tape to be mounted. Valid value is a 4-byte integer.

Temporary Errors The number of temporary, recoverable I/O errors that have occurred on this device. Valid value is a 4-byte integer.

User The address space name that has the device allocated. If this name is not available, the column is blank. Valid value is an 8-byte character string.

Volume The volume serial number in the mounted tape label. If this number is not available, the column is blank. Valid value is a 6-byte character string.