RE: 2.4.18 beats 2.5.50 in hard drive access????

From: Manish Lachwani (manish@Zambeel.com)
Date: Fri Dec 06 2002 - 18:02:34 EST


Try to set UDMA0 by

hdparm -X64 /dev/hda

or UDMA 2 by using:

hdparm -X66 /dev/hda

OSB4 should support UDMA 2. If anyting > UDMA2, then IDE warning should
appear in dmesg

CHeck the IDENTIFY information using hdparm -I /dev/hda to determine the
UDMA mode supported or /proc/ide/hda/identify, word# 88

-----Original Message-----
From: Alan Cox [mailto:alan@lxorguk.ukuu.org.uk]
Sent: Friday, December 06, 2002 3:21 PM
To: David Ashley
Cc: Linux Kernel Mailing List
Subject: Re: 2.4.18 beats 2.5.50 in hard drive access????

On Fri, 2002-12-06 at 19:29, David Ashley wrote:
> ide0: BM-DMA at 0x1880-0x1887, BIOS settings: hda:pio, hdb:DMA
> ide1: BM-DMA at 0x1888-0x188f, BIOS settings: hdc:pio, hdd:DMA

When we read the settings DMA was disabled on hda and hdc. We therefore
assumed the BIOS did that for a reason and followed caution.

What happens if you do

        hdparm -d1 /dev/hda

?

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Sat Dec 07 2002 - 22:00:28 EST