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Date: Thu, 26 Dec 2002 18:35:28 +0100
From: Tomas Szepe <szepe@pinerecords.com>
To: Frank van Maarseveen <F.vanMaarseveen@inter.NL.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Alot of DMA errors in 2.4.18, 2.4.20 and 2.5.52
Message-ID: <20021226173528.GF7348@louise.pinerecords.com>
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> On Thu, Dec 26, 2002 at 02:22:28PM +0100, Tomas Szepe wrote:
> > > 
> > > hdparm -X69 /dev/hda will put it into UDMA5/ata100 mode as well
> > > (69 == 64 + UDMA mode). No need to specify it at boot time.
> > 
> > Not true.  You definitely need to use the ideX boot param AND
> > run hdparm -X?? /dev/hd? to make use of UDMA3+ on newer PDC
> > controllers (unless you apply the patch posted on Dec 24 by
> > Nikolai Zhubr).
> 
> Driver says otherwise on RH8.0 + 2.4.20:
> iapetus /proc/ide# cat pdc202xx 
> 
> PROMISE Ultra series driver Ver 1.20.0.7 2002-05-23 Adapter: Ultra100 TX2
> --------------- Primary Channel ---------------- Secondary Channel -------------
>                 enabled                          enabled 
> 66 Clocking     enabled                          enabled 
> Mode            MASTER                           MASTER
> --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------
> DMA enabled:    yes              no              no                no 
> UDMA Mode:      5                0               0                 0
> PIO Mode:       4                0               0                 0

Fair enough.  Can you give me your PCI ids, Promise BIOS version
and "hdparm -Iv /dev/hda"?

-- 
Tomas Szepe <szepe@pinerecords.com>
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