> Ok, so I'm continuing to fight with this P-133 box. I've now added
> an AHA 1540C (? something close to that) and three drives. This is
> in addition to the two IDE drives and one IDE cdrom already installed.
> 
> I'm having a problem with the 4 gig IBM drive (the newest drive in the
> box) where it starts making scary clicking noises and subsequently
> the box crashes. 
> 
> You know the noise, the sound of a drive head reseeking on a sector,
> perhaps reading from a bad sector. Scary stuff, but no messages are
> returned on the console. 

My system does exactly the same thing when an ide cable comes
loose. I can fix it by pressing on the connector. Obviously I
either need a new cable, or the motherboard ide connnector is
faulty. UDMA/66 ide does crc as I understand, so I'm not very
worried when the system comes back by reseating the connector
but regular ide may not be so forgiving, and may corrupt your
data doing the same thing as I said above. Good luck.



> 
> 
> Anyway, I can bring the box down with: 
> # cd /local/src ; tar -cvvf /dev/null sys
> 
> The drive makes clicking noises and then shortly (meaning, before the
> tar finishes) the box freezes. I'm dropped into ddb. Here's a ten finger
> trace from ddb (partial):
> 
> db> trace
> cpu_Debugger(c02568a0,c0448e14,c41e207c,c41e2150,c0448e001) at cpu_Debugger+0x4
> aha_done(c0448e00,c41e2150,c0454010) at aha_done+0xae
> aha_finish_ccbs(c448e00,c0442e60,c444c7f0,c444c7f0,c4460c811)at aha_finish_ccbs+0x142
> aha_intr(c0448e00) at aha_intr+0x86
> --- interrupt ---
> 
> I'm running 1.5_ALPHA2.
> 
> Does this sound like a drive problem or a cabling problem? I suspect the
> drive is going north (I'm already in the South, so it must be going
> north). Would an ailing drive cause the aha driver to hang? 
> 
> How about if SCSIDEBUG and AHA_DEBUG (I think that's it) were defined
> when the kernel was built?
> 
> *sigh*
> 
> Thanks all.
> -- 
> Kevin P. Neal                                http://www.pobox.com/~kpn/
> 
> "Nonbelievers found it difficult to defend their position in \ 
>     the presense of a working computer." -- a DEC Jensen paper
> 
> 


-- 
Joseph Sarkes		jsarkes@tiac.net