RE: lug-bg: ViA i UDMA 66
- Subject: RE: lug-bg: ViA i UDMA 66
- From: bkrosnov@xxxxxxxxx (Boyan Krosnov)
- Date: Wed, 15 Nov 2000 10:58:42 +0200
> -----Original Message-----
> From: whitefang@xxxxxx [mailto:whitefang@xxxxxx]
> Sent: Wednesday, November 15, 2000 2:41 AM
> To: lug-bg@xxxxxxxxxxxxxxxxxx
> Subject: Re: lug-bg: ViA i UDMA 66
>
>
> VT82C586 e SouthBridge i dokolkoto mi e izvestno IDE controlera
> vgraden v nego ne e UDMA66,a UDMA33.
> Ako Chipset-a ti naistina e s VT82C586 niama nedejda da
> go podkarash v nishto pove4e ot UDMA33.No i tova e dovolno
> mnogo. I naj
> barzite UDMA66 diskove ne praviat po goliam 'pickov'
> vytreshen transfer
> ot 33MB(uvi)
tuk ne si praw, naj-byrzite udma 66 diskowe ne prawqt po-byrz sustained
transfer, pikov prawqt 50-60 MB ot cache-a na diska w RAM-ta
> S programkata hdparam mojesh da si vklu4ish DMA2(toest 33) za
> za dadeno ustroistwo.
> No predi tova triabva da e vklu4en i DMA2 rejim na IDE chanel-a
> na koito ti e zaka4en diska, i da niamash drugi ustroistva,koito,ne
> rabotitat v DMA33 na syshia kanal(naprimer CD Teac) ;-)
> Ili kato si kompilirash kernel-a si vklu4vash opciata
> "Enable DMA by default if available"-ili podobna(ne sam siguren).No ne
> ti prepora4vam.
> Ili podavash na kernel pri boot opcia "ideX=dma" (X=0 ili 1)
> Akoo diska ti master na IDE0:
> na kernel-a "ide0=dma"
> sled koeto s hdparm si vklu4vash DMA2 za samia disk:
> /sbin/hdparm -c1d1X34u1A1W1 /dev/hda
>
> DMA2 disk dava okolo 12MB testov fizi4eski transfer
> mojesh da si testvash transfera s hdparm -tT /dev/hda
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