Re: tuning ide-scsi/usb drives

[Sebastian Kapfer <sebastian_kapfer@web.de>]

On Sun, 21 Sep 2003 18:30:18 +0200, csj wrote:

> Have you tried the cat > /proc trick, something like:
> 
> cat using_dma:1 >  /proc/ide/hdX/settings

In the case of a real IDE device, you can use the plain old IDE device
nodes. My ide-scsi-driven CD-ROM drives (one burner, one reader) respond:

# hdparm -d /dev/ide/host0/bus1/target?/lun0/generic
 
/dev/ide/host0/bus1/target0/lun0/generic:
 using_dma    =  1 (on)
 
/dev/ide/host0/bus1/target1/lun0/generic:
 using_dma    =  1 (on)

(As you can see, I'm running devfs. The same thing should work with the
traditional /dev/hdc and /dev/hdd devices.)

> This works for my ide-scsi DVD-ROM drive.  Then again maybe what you
> need is the "scsitools" package:

I don't think the SCSI layer is the problem. Probably, it's the USB driver
or hardware. (Missing ehci module? USB1.1 port? USB1.1 cable between
USB2.0 devices?)

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