# t-det command

The t-det command detaches the tape from the current process or from
 another process. If no device number is specified, then all tape devices currently attached to
 this process are detached.

## Syntax

```
 t-det {device.num} {(options}
```

## Parameter(s)

| device.number | Number of tape devices. If no device number is specified, then all devices currently attached are detached. | |
| --- | --- | --- |
| options | u | Detaches the tape unit from any port except the spooler, which detaches automatically at the end of each job, and the transaction logger. This requires a sys2 privilege level. A device number is required. |
| z | Works only if the owner is the transaction logger. | |

## Description

On D3 UNIX systems, this command detaches the tape from the current port so that other
 processes, other UNIX users, or other D3 virtual machines can use it.

 The u option sends a UNIX signal to the process that owns the tape to
 force it to close the device. This is done through the *trap* mechanism.

 The t-det command is the default trap for this signal. If the system
 administrator disables this trap, or uses another command (for example, displaying a message
 to ask the user to detach the tape instead of taking the tape forcefully), the command fails
 with the following message:

```
 The tape is not available for use now
```

 The t-det (u command must be utilized with a specific tape device number
 or the (u option is ignored.

## See also

- [list-device command](https://d3codex.com/tcl/list-device-command/)
- [Port number](https://d3codex.com/definitions/port-number/)
- [t-select command](https://d3codex.com/tcl/t-select-command/)
- [Tape handling commands](https://d3codex.com/definitions/tape-handling-commands/)
- [Tape socket](https://d3codex.com/definitions/tape-socket/)
- [trap command](https://d3codex.com/tcl/trap-command/)

---
Source: https://d3codex.com/tcl/t-det-command/ - part of the D3Codex reference.