Re: /dev/hd[ijkl] only using udma (not udma 100)

On Mon, 27 May 2002, Thunder from the hill wrote:

> Hi,
> 
> On Mon, 27 May 2002 [e-mail] wrote:
> > Ive got a machine running debian test dist and 2.4.18. The machine has
> > two promise ata100 tx2 controller cards. My question is why does the
> > devices hde to hdh use udma100 but devices hdi to hdl only use udma.
> > Note on this is that the devices hdi to hdl did i have to make myself
> > (dont know if there is some other configure possibility). All drives are
> > the same model.
> 
> Well, you found the /sbin/hdparm solution, which isn't too bad (And 
> hopefully you added it to your boot scripts). However, watch that! If the 
> mode switches back to lower UDMA modes, it doesn't support the mode 
> properly and thus was downgraded.
> 

Only thing i get, while i was stresstesting the hardware, is that DMA gets
timeouts time from time and then the DMA gets disabled (logical
realy). But nothing happens with the transfer mode and thats good.