Re: Floppy Raid

From: Helge Hafting (
Date: Wed Oct 09 2002 - 02:44:01 EST

Stuart Inglis wrote:
> Hi all,
> I've been playing with RAID over floppy (2x3.5" /dev/fd0, /dev/fd1) and
> have a few questions. (With 2.4.18)
> It seems clear that you can only read/write to one floppy device at a
> time. Is this a hardware limit or a linux limit? fdformat to a single
> drive takes around 100 seconds, whereas running two fdformats in
> parallel takes close to 400 seconds (2.4.18). It looks like this is
> because the lock changes when the fdformat switches from writing to
> verifying.

Hardware limit _if_ you have two pc floppies on the same cable.
Use separate floppy controllers if you want simultaneous
access. That worked fine for me back in 1992 or so.

The relieblility of floppies makes me hope you're going
for raid-1 and not raid-0...

Helge Hafting
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Tue Oct 15 2002 - 22:00:29 EST