Hi folks,

I can't seem to be able to use my CD writer at full speed with Linux. I
thought this was a general problem, since with Windows it was the same,
but today I noticed I was able to burn an ISO image at full speed (16x),
while On-The-Fly-Copying a CD at 8x trashed the CD-R even with BurnProof.

Now, I suspect a wrong DMA mode or something, since the problem only
occurs with on-the-fly. The reading and writing drives are _not_ on the
same IDE string, they are both masters and my HDDs are on Promise ATA100.

How can I check/change the DMA status of my drives; or do you suspect
another problem?

~Mik
--
Top-Bottom Programming never gets you where you wanted to go.
Bottom-Top Programming gets you where you never wanted to go.

while not life:
sleep((sleep.normal_time - 5h)); eat(mode=fast); pc_mainloop()

Mario Berger wrote:

> Hi folks,
>
> I can't seem to be able to use my CD writer at full speed with Linux. I
> thought this was a general problem, since with Windows it was the same,
> but today I noticed I was able to burn an ISO image at full speed (16x),
> while On-The-Fly-Copying a CD at 8x trashed the CD-R even with BurnProof.
>
> Now, I suspect a wrong DMA mode or something, since the problem only
> occurs with on-the-fly. The reading and writing drives are _not_ on the
> same IDE string, they are both masters and my HDDs are on Promise ATA100.
>
> How can I check/change the DMA status of my drives; or do you suspect
> another problem?
>
hdparm -d /dev/whatever. I think.

Mario Berger wrote:

> Hi folks,
>
> I can't seem to be able to use my CD writer at full speed with Linux.

In short: you *have* to use SCSI emulation with programs like K3b or
XCdroast for them to work correctly.

NK
--
Whereof one cannot speak, thereof one frequently goes ranting on and on at
ball-breaking length. (Ludwig Wittgenstein, Tractatus Logico-Philosophicus,
first draft)

On Mon, 04 Oct 2004 13:20:41 +0200, Kiki Novak wrote:


> In short: you *have* to use SCSI emulation with programs like K3b or
> XCdroast for them to work correctly.

I *don't have* scsi emulation, i'm using atapi, and it works very good for
me... ok, i'm doing everything as a root maybe that makes a difference

i.

Ivan wrote:

> On Mon, 04 Oct 2004 13:20:41 +0200, Kiki Novak wrote:
>
>
>> In short: you *have* to use SCSI emulation with programs like K3b or
>> XCdroast for them to work correctly.
>
> I *don't have* scsi emulation, i'm using atapi, and it works very good for
> me... ok, i'm doing everything as a root maybe that makes a difference
>
Do you have a slow drive? There's no DMA using atapi, not to mention the
kernel code being unmaintained and IME buggy, for speeds > about 24x it's
really not an option.

On Tue, 05 Oct 2004 17:53:25 +0100, MikeyD wrote:

> Ivan wrote:
>
>> On Mon, 04 Oct 2004 13:20:41 +0200, Kiki Novak wrote:
>>
>>
>>> In short: you *have* to use SCSI emulation with programs like K3b or
>>> XCdroast for them to work correctly.
>>
>> I *don't have* scsi emulation, i'm using atapi, and it works very good for
>> me... ok, i'm doing everything as a root maybe that makes a difference
>>
> Do you have a slow drive? There's no DMA using atapi, not to mention the
> kernel code being unmaintained and IME buggy, for speeds > about 24x it's
> really not an option.

no, i can burn cd up to 32x, and dvds with 4x (nec 2500)
and hdparm gives me:
using_dma = 1 (on)

during reading/writing the processor (athlon xp 1500+) is almost not used,
so i think that dma is on.

Hi,

Am Tue, 05 Oct 2004 17:53:25 +0100, schrieb MikeyD:

>> I *don't have* scsi emulation, i'm using atapi, and it works very good for
>> me... ok, i'm doing everything as a root maybe that makes a difference
>>
> Do you have a slow drive? There's no DMA using atapi, not to mention the
> kernel code being unmaintained and IME buggy, for speeds > about 24x it's
> really not an option.

Maybe he's using kernel 2.6.x and you still 2.4.y?
With linux kernel 2.6 a new ATAPI interface has been developed and is
directly available with the IDE driver and supported by cdrecord.
'dev=/dev/hdc' is then the right way to specify the drive

Juergen

Juergen Frieling wrote:

> Hi,
>
> Am Tue, 05 Oct 2004 17:53:25 +0100, schrieb MikeyD:
>
>>> I *don't have* scsi emulation, i'm using atapi, and it works very good
>>> for me... ok, i'm doing everything as a root maybe that makes a
>>> difference
>>>
>> Do you have a slow drive? There's no DMA using atapi, not to mention the
>> kernel code being unmaintained and IME buggy, for speeds > about 24x it's
>> really not an option.
>
> Maybe he's using kernel 2.6.x and you still 2.4.y?
> With linux kernel 2.6 a new ATAPI interface has been developed and is
> directly available with the IDE driver and supported by cdrecord.
> 'dev=/dev/hdc' is then the right way to specify the drive
>
Oh, that could be the difference. I'm still using 2.4 as long as Pat keeps
it the default.