On Fri, Aug 25, 2000 at 01:53:06AM -0500, Kazushi Marukawa wrote:
>    On Aug 24, 16:48, Kazushi (Jam) Marukawa wrote:
>    > Subject: Re: IDE UDMA hangs on BP6 (HPT366)
>    > > What happens if you use only 2 drives, both on the Ultra/66 channels ?
>    > 
>    > Ok.  I'll try to such configuration using 2 drives on 2
>    > UDMA66 channlels.
> 
> I tested some more configurations.  The result is strange.
> When I connected onle two IDE drives, it worked fine.  I
> added 3rd one, then got error.  So, I guessed the reason is
> more than two drives.  However, when I add three drives but
> actually two kinds, it worked fine like 3rd configuration.
> 
> 
>  1) DJNA at IDE3-1 and Max60 at IDE4-2 is OK.
>  2) DJNA at IDE3-1, Max40 at IDE4-1, and Max60 at IDE4-2 is
>     bad.  I got following message.  Note: pciide1 is IDE3
>     since pciide0 is assigned as IDE1 and IDE2 although they
>     are ignored by kernel like following dmesg output.
> 
>   pciide1:0:0: lost interrupt
>           type: ata tc_bcount: 65536 tc_skip: 0
>   pciide1:0:0: bus-master DMA error: missing interrupt, status=0x21
> 
>  3) DJNA at IDE3-1, Max60 at IDE3-2, and Max60 at IDE4-2 is
>     OK.

I would still look for a bigger power supply :)
Maybe in this config you have less parallel outstanding requests to the
drive ? This depend on your applications of course ...

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
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