Burning speed

**satimis** · 11-12-2005

Hi folks,

FC2

I have CD-R purchased on the market which marked speed=52x. The speed of my Samsung writer is 40x-12x-40x. However on burning it only indicated in the range of 20x-30x varying from disc to disc, I used following commands to burn;

# mkisofs -J -joliet-long -o cdimage.raw /path/to/files
# cdrecord -v -eject cdimage.rw

The cdimage created has no problem without any warning, also checked by mounting it as loop. Whether I did some thing wrong? OR the speed on the discs was over-marked. The discs were manufactures by the brand-name of multi-nation companies. I found this problem on many occasions.

Burning CD-RW has no problem of the same kind. The burning speed was the same as marked on the CD-RW disc up to 12x allowed by my writer.

Please advise. TIA

BR
satimis

**antidrugue** · 11-12-2005

Maybe that's a little trivial, but have you made sure DMA is enable on that drive?

If not, enable it with "hdparm".

Of course, it is always possible that the media you bought isn't performing well with your drive specificaly... (had that problem in the past)

***Dapper Dan*** · 11-12-2005

It has been my experience that a higher burn speed seems to cause problems more so than with disks burned at a lower speed. I never burn any cd any higher than 14x, and more often 10x. If you burned at 12x, that is certainly a slow enough speed to insure a good burn. Often CDR's you buy will just be crap and for no known reason will not work. This could be the case. I'd try again, only drop down to 8x. If you still don't get a usable cd, then my guess would be that your file is corrupted.

**satimis** · 11-12-2005

Hi antidrugue,

Tks for your advice.

Maybe that's a little trivial, but have you made sure DMA is enable on that drive?

Performed follows;

# /sbin/hdparm -i /dev/hdc

Code:

/dev/hdc&#58;

 Model=SAMSUNG CD-R/RW SW-240B, FwRev=R403, SerialNo=
 Config=&#123; Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic &#125;
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 &#40;maybe&#41;&#58; CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO=&#123;min&#58;120,w/IORDY&#58;120&#125;, tDMA=&#123;min&#58;120,rec&#58;120&#125;
 PIO modes&#58;  pio0 pio1 pio2 pio3 pio4
 DMA modes&#58;  sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2
 AdvancedPM=no
 Drive conforms to&#58; ATA/ATAPI-5 T13 1321D revision 3&#58;

 * signifies the current active mode

Is DMA=on OR =off ???

Whether to run follow to enable DMA???

Code:

# /sbin/hdparm -d1 /dev/hdc

OR

Code:

# /sbin/hdparm -d 1 /dev/hdc

with a space.

Is it "d0"/"d 0" = disable/off DMA

TIA

B.R.
satimis

oz · 11-12-2005

I agree with Dapper Dan - it's better to use a slower speed (8x to 12x) if you are serious about your burns because most of the blank disks you buy at electronics retailers are pretty much pure crap even though they carry the 52x sticker.

**satimis** · 11-12-2005

Hi Dapper Dan,

I left the Writer to select burning speed automatically. The CD-R burned has no problem. I read each of the CD-R after burning. Off course I won't check all of them thoroughly only brief-checking.

My question is would it be worth paying more for high speed CD-R if they can't achieve the burning speed as assured on the discs.

BR
satimis

***Dapper Dan*** · 11-12-2005

All in all I think just getting quality disks are imortant if you need the assurance of a good burn. I usually buy the cheapest I can find since most are used for checking out new live cd's and distros. If I get a bad disk, I just throw it away and burn a new one.

You should have the option of burning at a lower speed in your burner.

**antidrugue** · 11-12-2005

You should get something like that with hdparm:

Code:

sudo hdparm /dev/hdc

/dev/hda&#58;
 IO_support   =  0 &#40;default 16-bit&#41;
 unmaskirq    =  0 &#40;off&#41;
 using_dma    =  1 &#40;on&#41;
 keepsettings =  0 &#40;off&#41;
 readonly     =  0 &#40;off&#41;
 readahead    = 256 &#40;on&#41;
 HDIO_GETGEO failed&#58; Invalid argument

If not, you just do :

Code:

hdparm -d1 /dev/hdc

If that doesn't work, it means that you should change the order of which modules are getting loaded at startup. We'll not go there for now.

To get it at startup, you have to edit the file /etc/hdparm.conf.

**satimis** · 11-13-2005

Hi antidrugue,

FC3

You should get something like that with hdparm:

Code:

sudo hdparm /dev/hdc

# sudo hdparm /dev/hdc

Code:

/dev/hdc&#58;
 HDIO_GET_MULTCOUNT failed&#58; Invalid argument
 IO_support   =  1 &#40;32-bit&#41;
 unmaskirq    =  1 &#40;on&#41;
 using_dma    =  1 &#40;on&#41;
 keepsettings =  0 &#40;off&#41;
 readonly     =  0 &#40;off&#41;
 readahead    = 256 &#40;on&#41;
 HDIO_GETGEO failed&#58; Invalid argument

I suppose DMA is on. If I'm wrong please correct me. Tks.

What is " HDIO_GET_MULTCOUNT failed: Invalid argument"?

If that doesn't work, it means that you should change the order of which modules are getting loaded at startup

Whether you meant to recompile the kernel?

To get it at startup, you have to edit the file /etc/hdparm.conf.

The config file does not exit,

# find / -name hdparm.conf
(No printout)
Could not find it.

BR
satimis

**antidrugue** · 11-13-2005

Yop yop, it's on, it's on.

Anyway, I should have known better. With DMA off you don't even get the kind of speed you have right now.

So don't bother going in that direction.

Just for the record:

Whether you meant to recompile the kernel?

Sometimes, when hdparm doesn't work, it's not necessary to recompile the kernel, you can just change the order of the modules in /etc/modules, so that you have

Code:

piix
ide-core

ABOVE

Code:

ide-cd
ide-disk
ide-generic

But, as I said, don't do that, the problem, if any, is not there.

Have fun with Google.

P.S. Concerning

What is " HDIO_GET_MULTCOUNT failed: Invalid argument"?

I'm pretty it is linked to the line

Code:

IO_support   =  1 &#40;32-bit&#41;

IO_support can be 0 (disable), 1 (enable) or 3 (enable_special).

Code:

man hdparm

For more info.

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