Sorry, if this issue was already discussed in lkml. I didn't find
a reference to this at http://www.geocrawler.com
My Problem:
I want to set the unmaskirq and dma -flag for my ide cd-recorder.
The Problem is, that devfs creates no ide device, but only
the /dev/scsi/../{cd,general} devices are created. And hdparm
don't accepts this devices for setting the ide-parameters.
My current workaround is to create a /dev/hd? device "by hand"
at system startup. This is not very beautiful. Furthermore, if
the device numbers in devfs are deactivated, this won't work
anymore.
I can live with my current solution. But i would be very happy
if someone can present a clean solution.
I posted this message intentionally not on the devfs mailing list
as i think this problem is related to accessing the same device
through different /dev entries. Under devfs, the /dev/ide/...
device node gets allocated after the corresponding ide-xx.o has
been loaded. But this is not possible with ide-scsi claiming
the device :(
Thanks in advance
--
Eduard Hasenleithner
student of
Salzburg University of Applied Sciences and Technologies
Eduard Hasenleithner wrote:
> Sorry, if this issue was already discussed in lkml. I didn't find
> a reference to this at http://www.geocrawler.com
>
> My Problem:
> I want to set the unmaskirq and dma -flag for my ide cd-recorder.
> The Problem is, that devfs creates no ide device, but only
> the /dev/scsi/../{cd,general} devices are created. And hdparm
> don't accepts this devices for setting the ide-parameters.
>
> My current workaround is to create a /dev/hd? device "by hand"
> at system startup. This is not very beautiful. Furthermore, if
> the device numbers in devfs are deactivated, this won't work
> anymore.
>
> I can live with my current solution. But i would be very happy
> if someone can present a clean solution.
>
> I posted this message intentionally not on the devfs mailing list
> as i think this problem is related to accessing the same device
> through different /dev entries. Under devfs, the /dev/ide/...
> device node gets allocated after the corresponding ide-xx.o has
> been loaded. But this is not possible with ide-scsi claiming
> the device :(
>
> Thanks in advance
workaround - before ide-scsi is loaded in boot sequence
(finding is left as an exercise to the reader :) do:
modprobe ide-cd
hdparm -u 1 -d 1 /dev/xxx
rmmod ide-cd
might have to do near top of /etc/rc.d/rc.sysinit under redhat,
but this is good since problems will happen before root filesystem
is remounted read-write, so any problems with hdparm settings
won't mess up disk.
procfs
echo unmaskirq:1 /proc/ide/hdx/settings
Andre Hedrick
Linux ATA Development
ASL Kernel Development
-----------------------------------------------------------------------------
ASL, Inc. Toll free: 1-877-ASL-3535
1757 Houret Court Fax: 1-408-941-2071
Milpitas, CA 95035 Web: http://www.aslab.com
On Thu, Mar 01, 2001 at 03:10:53AM -0800, Andre Hedrick wrote:
>
> procfs
>
> echo unmaskirq:1 /proc/ide/hdx/settings
>
Thank you, thats perfect. Is setting the parameters a relatively
new feature? I searched for a possibiliy like this and found no
references.
PS: Is there still a possibility for setting the IDE-sleep timeout
for a ide-scsi harddisk? (I know, this doesnt make sense)
--
Eduard Hasenleithner
student of
Salzburg University of Applied Sciences and Technologies
> PS: Is there still a possibility for setting the IDE-sleep timeout
> for a ide-scsi harddisk? (I know, this doesnt make sense)
I didn't know you could use ide-scsi emulation for hard drives.
--
Lab tests show that use of micro$oft causes cancer in lab animals
Wakko Warner wrote:
> > PS: Is there still a possibility for setting the IDE-sleep timeout
> > for a ide-scsi harddisk? (I know, this doesnt make sense)
Yeah, why would you ? ide-scsi is mainly to support cd-rw
drives, AFAIK
>
>
> I didn't know you could use ide-scsi emulation for hard drives.
>
> --
> Lab tests show that use of micro$oft causes cancer in lab animals
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
On Fri, Mar 02 2001, Jeremy Jackson wrote:
> Wakko Warner wrote:
>
> > > PS: Is there still a possibility for setting the IDE-sleep timeout
> > > for a ide-scsi harddisk? (I know, this doesnt make sense)
>
> Yeah, why would you ? ide-scsi is mainly to support cd-rw
> drives, AFAIK
It's a general SCSI-over-ATAPI interface, and as such regular ATA
hard drives cannot be run with ide-scsi.
--
Jens Axboe
There are mystert ATAPI harddrives in the world!
On Fri, 2 Mar 2001, Wakko Warner wrote:
> > PS: Is there still a possibility for setting the IDE-sleep timeout
> > for a ide-scsi harddisk? (I know, this doesnt make sense)
>
> I didn't know you could use ide-scsi emulation for hard drives.
>
> --
> Lab tests show that use of micro$oft causes cancer in lab animals
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
Andre Hedrick
Linux ATA Development
ASL Kernel Development
-----------------------------------------------------------------------------
ASL, Inc. Toll free: 1-877-ASL-3535
1757 Houret Court Fax: 1-408-941-2071
Milpitas, CA 95035 Web: http://www.aslab.com