The t-act command selects a previously attached tape device as the currently active device to read and write to. D3 releases not only can have many users using many tapes simultaneously, a single user can have multiple tapes. This command allows switching between tapes.
The t-cascade command cascades or links one tape device to another tape device, either in a chain or a loop. Instead of prompting for the next reel, the system uses the forwardly linked device specified. Tape attachment is not checked. This command updates the links of the tape devices.
The t-dump command copies items from a given file to the attached peripheral storage device. The heading modifier allows specifying the contents of the tape label written to the tape prior to the dump. The tape must already be at load point in order to write the tape label.
The t-link command links or cascades one tape device to another tape device, either in a chain or a loop. Instead of prompting for the next reel, the system uses the forwardly linked device specified. Tape attachment is not checked. This command updates the links of the tape devices.
The t-load command restores files from a tape that was generated by t-dump. If a selection criteria is not specified, the entire file is loaded. If multiple t-dump commands were performed, then multiple executions of t-load are required to restore the data.
The t-read command reads from the magnetic media unit attached to the current process and displays the contents of each block read to the terminal or printer. Any type of Pick-formatted media may be read with this command.
The t-unload command rewinds the attached tape. On D3 UNIX systems, this command does the usual tape unload. Depending on the UNIX operating system, this command may wait for the tape to rewind before returning.
The t-verify command validates the integrity of file-save or account-save backups. The process can compare the contents of the backup media with the corresponding data on disk, or check the media to ensure that it has the correct backup format.
The t-weof command writes an EOF mark at the current position on the attached magnetic media. It also causes a flush of the last buffer written. This is important to ensure any partially filled buffer was written onto the tape.
The tcls command suspends the process on the specified port, pushes a level on that port, then executes the TCL command. This is different from the tcl command in that tcls suppresses the messages generated by the command that was executed on the remote port.
The term-type BASIC program reads the terminal and printer characteristics from attribute 2 of the PIBs file and automatically sets them, or sets them and updates the permanent settings for the current line.
The tlqdisplay command allows you to display the transactions within the transaction queue used by both the D3 Transaction Logger and Hot Backup components. The start location in the transaction queue can be specified.
The txlog-off command turns off transaction log enqueueing for the current process. No matter what operation is done by the user, a transaction will not be placed in the queue for later dequeuing to the tape or hot backup machine.