ct
—
CS/80 cartridge tape interface
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.
Read and writes of less than 1024 bytes will not behave as expected.