The Ftape Installation Guide - zftape devices
I chose the following names(1) for the devices provided by zftape (example for drive selection method A, see Drive selection):
device name | bits of minor device number `lsb-msb ' | compr. support | file marks | rewind on close | can read v2.x | raw access ioctls |
/dev/qft0 | 0|0|0|0|0|0|0|0 | no | yes | yes | yes | no |
/dev/nqft0 | 0|0|1|0|0|0|0|0 | no | yes | no | yes | no |
/dev/zqft0 | 0|0|0|0|1|0|0|0 | yes | yes | yes | yes | no |
/dev/nzqft0 | 0|0|1|0|1|0|0|0 | yes | yes | no | yes | no |
/dev/rawft0 | 0|0|0|0|0|1|0|0 | no | no | yes | no | yes |
/dev/nrawft0 | 0|0|1|0|0|1|0|0 | no | no | no | no | yes |
The headers of the different columns have the following meaning:
bits of minor device number
'
compr. support
'
file marks
'
rewind on close
'
n
' in front of all the device names that rewind when closing them
(see Rewinding devices, see MTREW, see MTOFFL).
can read v2.x
'
raw access ioctls
'
Please refer to the respective subsections for more remarks about the different devices (see /dev/qft, see /dev/rft, see /dev/zqft, see /dev/rawft).
There is a script MAKEDEV.ftape that can produce these devices for
you. See Installing ftape. You find it under
`./contrib/scripts/
'. The devices which I called `/dev/qft*
'
and `/dev/nqft*
' were also used by the original ftape. In the latest
versions of the original ftape-2.x driver they were called `/dev/rft*
'
and `/dev/nrft*
', older versions of ftape called them
`/dev/ftape
' and `/dev/nftape
'. See Installing ftape.
(1) The `q
' stands for QIC,
the `z
' for `zip
', a hint for the builtin compression zftape
provides, and the `n
' is a shortcut for Non-rewinding
(see Rewinding and non-rewinding devices)
(2) least significant bit
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