ide cdrom performance issue

ide cdrom performance issue

[Yossi Down-Under]

Running RH9 with xcdroast and three recorders each on its own ide
channel configured for ide-scsi. Having trouble with buffer underruns.
Am told by xcdroast author that it is a kernel ide driver issue,
specifically not using dma for transfers and recommended I try a newer
kernel.

My question is whether the 2.5.75 kernel is going to improve this
situation before going to the trouble to install it?

Thanks,

L. Baker

Re: ide cdrom performance issue

[Jens Axboe]

On Sun, Oct 05 2003, Yossi Down-Under wrote:
> Running RH9 with xcdroast and three recorders each on its own ide
> channel configured for ide-scsi. Having trouble with buffer underruns.
> Am told by xcdroast author that it is a kernel ide driver issue,
> specifically not using dma for transfers and recommended I try a newer
> kernel.
> 
> My question is whether the 2.5.75 kernel is going to improve this
> situation before going to the trouble to install it?

2.5.75?! That kernel is ancient, you should download 2.6-test6 and give
that a try. Note that you should not then use ide-scsi (don't config it
in), and you need to give -dev=/dev/hdc as device argument to cdrecord.
Replace hdc with whatever is your cd-r drive.

-- 
Jens Axboe

Re: ide cdrom performance issue

[Yossi Down-Under]

On Mon, 2003-10-06 at 09:37, Jens Axboe wrote:
> On Sun, Oct 05 2003, Yossi Down-Under wrote:
> > Running RH9 with xcdroast and three recorders each on its own ide
> > channel configured for ide-scsi. Having trouble with buffer underruns.
> > Am told by xcdroast author that it is a kernel ide driver issue,
> > specifically not using dma for transfers and recommended I try a newer
> > kernel.
> > 
> > My question is whether the 2.5.75 kernel is going to improve this
> > situation before going to the trouble to install it?
> 
> 2.5.75?! That kernel is ancient, you should download 2.6-test6 and give
> that a try. Note that you should not then use ide-scsi (don't config it
> in), and you need to give -dev=/dev/hdc as device argument to cdrecord.
> Replace hdc with whatever is your cd-r drive.

OK, I did this. There must be some new package for module management
required that is not in RH9 as it failed to load the network module when
booted so I just compiled it into the kernel instead.

The problem I have now is that without using ide-scsi, xcdroast
0.98alpha14 doesn't see the drive. Will the ide-scsi driver also gain
the use of dma transfers or should I go back to the xcdroast author to
modify the program to use ide drives without scsi emulation?

Thanks,

L. Baker

Re: ide cdrom performance issue

[Jens Axboe]

On Wed, Oct 08 2003, Yossi Down-Under wrote:
> On Mon, 2003-10-06 at 09:37, Jens Axboe wrote:
> > On Sun, Oct 05 2003, Yossi Down-Under wrote:
> > > Running RH9 with xcdroast and three recorders each on its own ide
> > > channel configured for ide-scsi. Having trouble with buffer underruns.
> > > Am told by xcdroast author that it is a kernel ide driver issue,
> > > specifically not using dma for transfers and recommended I try a newer
> > > kernel.
> > > 
> > > My question is whether the 2.5.75 kernel is going to improve this
> > > situation before going to the trouble to install it?
> > 
> > 2.5.75?! That kernel is ancient, you should download 2.6-test6 and give
> > that a try. Note that you should not then use ide-scsi (don't config it
> > in), and you need to give -dev=/dev/hdc as device argument to cdrecord.
> > Replace hdc with whatever is your cd-r drive.
> 
> OK, I did this. There must be some new package for module management
> required that is not in RH9 as it failed to load the network module when
> booted so I just compiled it into the kernel instead.
> 
> The problem I have now is that without using ide-scsi, xcdroast
> 0.98alpha14 doesn't see the drive. Will the ide-scsi driver also gain
> the use of dma transfers or should I go back to the xcdroast author to
> modify the program to use ide drives without scsi emulation?

ide-scsi is deprecated for cd burning, so yes you should probably talk
to him about updating xcdroast.

-- 
Jens Axboe