| Name | Label | Type | Length | Format | Informat | External Name | Recommended |
|---|
| BLKSIZE | PhysicalBlockSize(bytes) | Numeric | 6 | | | BLKSIZE | No |
| BYEREAD | UncompressedChannelBytesRead | Numeric | 6 | | | BYTEREAD | No |
| BYEWRIT | UncompressedChannelBytesWritten | Numeric | 6 | | | BYTEWRIT | No |
| CLEAN | ReadCleanerActions | Numeric | 6 | | | CLEAN | No |
| DATETIME | Datetime | Numeric | 8 | NLDATM. | | SMFTIME | No |
| DCBOFLG | DcboflgControlByte | Numeric | 6 | HEX2. | | DCBOFLG | No |
| DENSITY | TapeDensity | Character | 4 | | | DENSITY | No |
| DEVICE | DeviceType | Character | 7 | | | DEVICE | No |
| DEVNR | DeviceNumber | Numeric | 6 | HEX4. | | DEVNR | No |
| ERASE | WriteEraseActions | Numeric | 6 | | | ERASE | No |
| ERRORS | TotalTapeErrors | Numeric | 6 | | | ERRORS | No |
| LCU | LogicalControlUnit | Numeric | 6 | HEX4. | | LCU | No |
| LSTPDATE | LastProcessDate | Numeric | 8 | NLDATM. | | | Yes |
| MACHINE | SystemId | Character | 4 | | | SYSTEM | No |
| NOISE | NoiseBlocksDetected | Numeric | 6 | | | NOISE | No |
| OPEN | TypeOfOpen | Character | 7 | | | OPEN | No |
| PEMREAD | PermanentReadErrors | Numeric | 6 | | | PERMREAD | No |
| PEMWRIT | PermanentWriteErrors | Numeric | 6 | | | PERMWRIT | No |
| SICOUNT | Start-ioCount | Numeric | 6 | | | SIOCOUNT | No |
| SM21CRR | ReadCompressionRatio | Numeric | 6 | PERCENT9.2 | | SMF21CRR | No |
| SM21CRW | WriteCompressionRatio | Numeric | 6 | PERCENT9.2 | | SMF21CRW | No |
| SM21DBR | CompressedDeviceBytesRead | Numeric | 6 | MGBYTES. | | SMF21DBR | No |
| SM21DBW | CompressedDeviceBytesWritten | Numeric | 6 | MGBYTES. | | SMF21DBW | No |
| SM21FL1 | GeneralFlagBytes | Character | 1 | $HEX2. | | SMF21FL1 | No |
| TACUSER | TapeUnitSerialOfCreation | Character | 3 | $HEX6. | | TAPCUSER | No |
| TEPRBER | TemporaryReadBackwardErrors | Numeric | 6 | | | TEMPRBER | No |
| TEPREAD | TemporaryRead(non-buffered)Errors | Numeric | 6 | | | TEMPREAD | No |
| TEPRFER | TemporaryReadForwardErrors | Numeric | 6 | | | TEMPRFER | No |
| TEPWRER | TemporaryWrite(buffered)Errors | Numeric | 6 | | | TEMPWRER | No |
| TEPWRIT | TemporaryWrite(non-buffered)Errors | Numeric | 6 | | | TEMPWRIT | No |
| UCBTYPE | UcbType | Numeric | 6 | HEX8. | | UCBTYPE | No |
| UNITADR | UnitAddress | Numeric | 6 | HEX4. | | UNITADR | No |
| VOLSER | VolumeSerialNumber | Character | 6 | | | VOLSER | No |
| ZDATE | ZeeDateZeeObsWasCreated | Numeric | 4 | NLDATE10. | | ZDATE | No |