Re: hdc: [PTBL] [2495/255/63] hdc1, what is PTBL?
Egor Tur, 2002-Dec-30 19:59 +0200:
> Hi folk, Hi Alvin.
> > > I see when my system boot up:
> > > hda: 19932192 sectors (10205 MB) w/426KiB Cache, CHS=1240/255/63, UDMA(66)
> > > hdb: 44150400 sectors (22605 MB) w/1966KiB Cache, CHS=2748/255/63, UDMA(33)
> > > hdc: 40088160 sectors (20525 MB) w/1961KiB Cache, CHS=39770/16/63, UDMA(33)
> >
> > Notice ... hda/hdb is 255 heads in the CHS ( same ide cable )
> >
> > also notice, you're running a ata-33(hdb) device with a ata-66 drive(hda)
> > on the same cable...
> > move hdb to hdd instead ( other ide cable )
> >
> OK. I know that all my disks use UDMA(66). I try their on other computer and when I connect
> hdc disk on primary cable it shows UDMA(66).
> I compile kernel with automatically use DMA mode for IDE disk.
> But hdparm -i /dev/hdb | grep dma:
> DMA modes: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4
> I try hdparm -X68 /dev/hdb && hdparm -i /dev/hdb | grep dma:
> DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 *udma4
> How can I tell my kernel use UDMA(66) when kernel loads?
AIUI, you need to set append="ide0=ata66" in /etc/lilo.conf. This is
what I do. If I don't set this, I see a message in /var/log/dmesg
that states ide will use 33Mhz since it can't determine the actual
speed. There was some discussion on this recently on this list.
jc
--
Jeff Coppock Systems Engineer
Diggin' Debian Admin and User
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