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:
Unknown
Free
Allocated
Mount
Dropped
Not Responding
DDR Swap
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.