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Hey, Emacs, we're -*-Text-*- mode!
Known Bugs:
* proc files system
The procfs entry causes kernel Oopses when the ftape module is
removed while somebody accesses the /proc/ftape entry. Unluckily
this can't be solved from inside ftape. The problem is that the
current procfs implementation provides no means to determine whether
the procfs entry is in use.
Solved for kernel versions > 2.1.58
* llseek
Trying to seek the device special files will not return an error
although llseek isn't implemented. This is much the same with st.c
and tpqic.c and ide-tape.c
Should this be fixed? Maybe supply zftape with a dummy llseek() that
simply returns -ESPIPE.
Done.
* formatting with Colorado Jumbo 350
This doesn't seem to work. I don't think that the kernel driver
needs to be changed; it should be possible to fix this in user
space, modifying ftformat.
* You can't use the Iomega Ditto MAX drives with any other device than
the first one, i.e. with /dev/nqft0, /dev/qft0 etc. This seems to be
a peculiarity of the Ditto MAX, i.e. a hardware bug of either the
Ditto Max drive or the Ditto EZ controller.
* The Ditto EZ 4Mbps controller will break the standard floppy disk
controller when configured to use DMA channel 2 (the one used by the
standard FDC). Apparently it doesn't help to try to disable the DMA
gate of the Ditto EZ controller. I think this is a hardware bug of
the EZ controller.
* Ftape versions prior to ftape-4.04 have a bug concerning the volume
table of format code 6 cartridges (i.e. cartridges with more than
2^16 segments). Sharing such cartridges with other operating systems
and ftape will cause data loss (ONLY for versions prior to 4.04).
FIXME!
Claus-Justus Heine <heine@instmath.rwth-aachen.de>
-------------------------------------------------------------------------------
LocalWords: procfs ftape llseek tpqic zftape ESPIPE ftformat Iomega
LocalWords: dev nqft qft FIXME Justus claus momo rwth aachen
LocalWords: LocalWords EZ Mbps FDC tjones estinc Linux SMP
LocalWords: sigpending fttools README heine
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