Very Computer

by **Marc Zuckma** » Wed, 31 Dec 1997 04:00:00

My 1.4Mb 3.5" floppy has become intermittently unusable.

At first I thought the problem was provoked by running
DosEMU, but now I'm less than convinced.

When I try to mount the floppy, mount fails with a message
like /dev/fd0 is not a valid block device, and
I get a kernel message like this :

kernel: floppy0: unable to allocate DMA memory.

I'm running 2.0.32. Is this a likely controller, device, or
kernel problem?

One associate of mine suggests that if the lower 16Mb of
memory is filled, additional DMA memory cannot be
allocated on a machine with pc architecture. This seems
quite plausible to me, but I wonder whether someone can
confirm the hypothesis.

Any workarounds?

Thanks,

Marc

by **Bernhard Oeme** » Thu, 08 Jan 1998 04:00:00

> kernel: floppy0: unable to allocate DMA memory.
> One associate of mine suggests that if the lower 16Mb of
> memory is filled, additional DMA memory cannot be
> allocated on a machine with pc architecture. This seems
> quite plausible to me, but I wonder whether someone can
> confirm the hypothesis.
> Any workarounds?

I don't know for sure, but I could fix a simmilar problem with quake2
(allocation of continous memory chunks?) by upgrading my libc.so.5.4.7
to libc.so.5.4.33. Just a guess, but maybe it helps ...

cu

--
Bernhard Oemer || E-mail: oemer<at>tph<dot>tuwien<dot>ac<dot>at
Technical University || WWW & PGP-key: http://tph.tuwien.ac.at/~oemer
Vienna (Austria) || today's fortune: man 1 perl | grep -1 virtues

Very Computer

Floppy Disk Kernel Error: Can't allocate DMA mem

Floppy Disk Kernel Error: Can't allocate DMA mem

Floppy Disk Kernel Error: Can't allocate DMA mem