Re: [rtl] long time stability ...

[Andris Pavenis <pavenis@lanet.lv>]

On Tue, 20 Oct 1998, Oliver Schindler wrote:

> Hi there,
> I have troubles with the long time stability of rt-linux.. Here is the
> story:
> 
> We are runnuing RT-Linux Patch 0.5 on a Kernel 2.0.29 on multiple PC's,
> using
> the edf-scheduler with 4 RT_Tasks and RT-Fifos. The system is stable and
> 
> works fine, but after three or ,four months the harddisks crashes. They
> have lost inodes
> , invalid blocks in the inodes and different other errors, only
> formatting and reinstalling
> will help there. The same Kernel without  the RT-Patch running on equal
> hardware stable
> for nearly a year .

Are they really equal: the same chipset, same model of HDD etc.
It is known that some chipsets together with some disk drives have problems
also without rt-linux. I had such problems some time ago on one system
in average once per 1-3 months. Similar problems were discussed in
Linux kernel mailing list some months ago (end of July if I remember 
correctly). Currently I have moved to different system and don't have
problems for about a half a year. 
 
More:
	
read docs for hdparm (man hdparm). I think that using rt-linux is
similar as using 'hdparm -u' that is considered dangerous on some 
hardware. 

Also try to turn off IDE DMA. 

> 
> Has anyone made the same experiences ?? Will a change to a newer kernel
> / RT-Patch help ?
> Is it a general problem  , dealing with  interrupting the IDE- Interrupt
> ??
> 
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