🚀 go-pugleaf

Willy D <willy.d@planetinternet.be> wrote in article
<6udres$eet$1@antwerpen.planetinternet.be>...
> Little problem:
> 
> I will use UDMA with my HD Maxtor DiamonMax 3400 (master on primary, with
> Quantum Fireball - PIO 4 as slave) and the AOpen 36-speed CD-drive
(master
> on secondary, with Philips CDD 3610 CD-RW - PIO 3 as slave).
> 
> If I enable UDMA in the BIOS, WIN98 hangs.


Try a very short two connector only EIDE cable for the Maxtor alone and see
if UDMA mode works.  If that fixes UDMA mode then get a cable from
www.ultracable.com and reconnect both the Maxtor and Fireball.

> When I disable UDMA in the BIOS
> and let WIN98 detect the Maxtor-HD and the Aopen-CD-drive, everything 
seems
> to be OK: the DMA-boxes in the drivers panel are clicked in each case.


Probably running DMA mode 2.

> Test results with WinTune 98:
>     Cached Disk = 43,104 MB/s
>     Uncached Disk = 1,792 MB/s


Wintune is useless as a disk benchmark.  Use Winbench98 and HDTach.

> After reading several messages in this NG, I am confused, apparently both
> the BIOS and the DMA-box must be enabled in order to have UDMA.


Right.
 
> Now, is my HD using UDMA or not ???


What is the read burst rate and CPU usage reported by HDTach?
http://tcdlabs.simplenet.com/hdtach.htm