| CT(4) | Kernel Interfaces Manual (HP300) | CT(4) | 
NAME
 ct — CS/80 cartridge tape interface
SYNOPSIS
 ct0 at hpibbus? slave ?
DESCRIPTION
 The cartridge tape interface as found in the 7946 and 9144 products provides a standard tape drive interface as described in 
mtio(4) with the following exceptions:
- 
There is only one density.
- 
Only the “raw” interface is supported.
- 
The MTIOCTOP ioctl(2) is limited. In particular, the command, MTFSR is not supported.
- 
The MTIOCGET ioctl(2) is not supported.
- 
The record size for read and write operations must be between 1K and 64K inclusive.
Special files rct0 through rct3 refer to rewind on close interfaces to drives 0 to 3. Files rct4 through rct7 refer to no-rewind interfaces. Files rct8 through rct11 refer to streaming rewind on close interfaces. (Only 9144 type devices can stream.) Lastly, rct12 through rct15 refer to streaming no-rewind interfaces.
 
BUGS
 Read and writes of less than 1024 bytes will not behave as expected.