Re: [rtl] Floppy disk

[Nicholas Mc Guire <der.herr@hofr.at>]

> > 
> > I'm using RTAI (1.3) instead of RTL, and there I had no problems 
> > using my floppy drive.
> > 

if you access the floppy during a realtime task running do you get an 
increased scheduling jitter ?

> > Investigating the system, I realized, that the interrupt latency time of 
> > my real-time task increased a lot (>10us) doing floppy read/write at 
> > the same time. So I think, it's a good advice *not* to use your floppy 
> > when a real-time task is running.
> > Perhaps Victor and his RTL-crew knew about this problem and so 
> > they simple block up floppy access during real-time operations.
> 
> ....or rather intentionally compiled the driver as a module...?
>

It would be a good idea not to use the floppy drive during rt-operations 
running since the floppy-drive can cause substantial delays . But there is
nothing in the RTLinux kernels/patches preventing you from using your floppy.

hofrat