|Command||tcl.set-sct Verb: Access/Tape Commands
Applicable release versions: AP, R83
|Category||Tape Commands (36)|
|Description||attaches the streaming cartridge tape drive to the current process. This must be executed before any other tape handling commands.
Specifies a 1/4-inch streaming tape unit as the peripheral storage device. "set-sct" automatically specifies a tape-attach command (t-att) and a rewind (t-rew).
"blocksize" may be any value between 512 and 16384. The default is 16384. The block size must be a multiple of 512.
Make sure the hardware is present for a 1/4-inch drive. Otherwise, the port may wait forever.
If only one density is available then it is used. The default is high density.
To improve reliability of Streaming Cartridge Tapes (SCT's), it is strongly advised to retension the tape prior to performing any tape input or output operations. (see "t-ret" or "t-reten").
On AP/Unix systems, this verb is provided for compatibility. (see "set-device").
|Options||l Low density, if available.
h High density, if available.
m Assigns number of buffers using the total real memory minus 256K or 768 buffers, or 384K on a 640K system. Pick Systems strongly advises using this option to increase tape streaming and decrease the number of stop/starts, which decreases tape reliability. (R83) 3.1 only.
r Indicates that the tape is in "old" format, meaning that it was created on a version prior to 2.2. (R83) 2.2 and higher
s Standard density, if available.