Very High Frequency Data (VHF)
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| 5 |
| 4 | 3 |
| 2 |
| 1 |
| 0 |
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| 0 |
| (MSB) |
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| Parameter Code (0000h) |
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| 1 |
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| (LSB) |
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| 2 |
| DU (0) |
| DS (1) |
| TSD (0) |
| ETC (0) | TMC (0) |
| LBIN (1) |
| LP (1) |
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| Commands |
| 3 |
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| Parameter Length (4h) |
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| 6 |
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| Rsvd (0) |
| HIU |
| MAcc |
| Tape Motion Status |
| CRqst |
| CRqrd |
| DInit |
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| Cmpr | WrtP |
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| 5 |
| InXtm |
| Rsvd (0) |
| RAA |
| MPrsnt | Rsvd (0) |
| MStd |
| MThrd |
| DAcc |
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| 7 |
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| Reserved (0) |
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| RRqst |
| IntfC |
| TAFC |
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| HIU |
| Host Initiated Unload bit |
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| MAcc |
| If set, the MAM is accessible. MPrsnt must be set as well. |
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| Cmpr |
| Compress bit. If set, the DTD currently has data compression enabled. |
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| WrtP |
| Write Protect bit. If set, the media in the DTD is physically |
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| MPrsnt is set. |
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| CRqst |
| Clean Requested bit |
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| CRqrd |
| Cleaning Required. If set, head cleaning must be performed before normal data |
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| operations are possible. This takes priority over CRqst, and both may be set at the |
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| DInit |
| DTD Initialized. When set, the data returned by the VHF parameter data is valid. |
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| InXtn |
| In Transition. If 0, the DTD is in the state reflected by the rest of byte 5 and is not |
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| attempting to leave this state. This bit must be 0 if RRqst is set. |
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| RAA |
| Robotic Access Allowed. If set, robotic media access to the DTD is allowed. |
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| MPrsnt |
| Media Present bit (hardware sensor) |
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| MStd |
| Media Seated. If set, the tape is mechanically seated, that it physical loading is |
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| MThrd |
| Media Threaded |
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| DAcc |
| Data Accessible. If set, the DTD has finished processing a load operation. The bit is |
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| cleared to | 0 at the beginning of the next unload operation. |
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| Tape Motion |
| 00h | No tape motion |
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| Status |
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| 01h | Cleaning operation in progress |
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| 02h | Tape being loaded |
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| 03h | Tape being unloaded |
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| 04h | Tape in motion |
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| 05h | Reading |
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| 06h | Writing |
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| 07h | Locating |
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| 08h | Rewinding |
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| Vendor unique |
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LOG SENSE 4Dh 63