hdparm -X34 -d1 /dev/hda
Only after booting.
On 6 Apr 1999, Dale E. Martin wrote:
>
> I have an IBM 10.1G UDMA drive. I'm using it with a Tyan dual PPro
> motherboard - it's an S1668, upgraded with the latest (May 1998) bios.
>
> The odd thing is that the kernel will only talk to the drive in UDMA mode
> if I have my old Western Digital 1.6G disk plugged in on the secondary
> controller. Since I'm giving that disk away, this is a small concern.
> (It's only a small concern since linux is installed primarily on SCSI disks
> attached to the same system.)
>
> Here are the relevant bits of a boot where the kernel isn't happy with the
> drive:
>
> [ snip ]
>
> PIIX3: IDE controller on PCI bus 00 dev 39
> PIIX3: not 100% native mode: will probe irqs later
> ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
> ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
> hda: IBM-DTTA-351010, ATA DISK drive
> hdd: TOSHIBA CD-ROM XM-6102B, ATAPI CDROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: IBM-DTTA-351010, 9671MB w/466kB Cache, CHS=1232/255/63, UDMA
> hdd: ATAPI 24X CD-ROM drive, 256kB Cache
> Uniform CDROM driver Revision: 2.54
>
> [ snip ]
>
> Partition check:
> sda: sda1 sda2 sda3 sda4
> sdb: sdb1 sdb2
> sdc: sdc1
> hda:hda: timeout waiting for DMA
> hda: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> hda: DMA disabled
> ide0: reset: success
> hda1 hda2 hda3 < hda5 hda6 hda7 >
>
> [ snip ]
>
> Like I said - this doesn't happen if I install my Western Digital AC31600
> to the secondary controller. Then I don't het the timeout message, and
> hdparm says it's talking to the drive using UDMA.
It can't............do it. this the disable.
> Thanks for any hints.
>
> Later,
> Dale
> --
> +------------------------- pgp key available --------------------------+
> | Dale E. Martin | Clifton Labs, Inc. | Senior Computer Engineer |
> | dmartin@clifton-labs.com | http://www.clifton-labs.com |
> +----------------------------------------------------------------------+
>
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>
Andre Hedrick
The Linux IDE guy
http://www.dyer.vanderbilt.edu/server/udma/2.2.5.uniform-ide-6.19.patch.gz
APC UPS Daemon Support Center.
http://www.brisse.dk/site/apcupsd/
Going GPL2 source on April 7, 1999
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