burn DVDR faster than 1.30x

[Peter Magnusson]

I cant burn DVDR's faster than 1.30x or something like that. cdrecord says:

cdrecord: DMA speed too slow (OK for 9x). Cannot write at speed 16x.

hdparm says:

/dev/cdwriter:
  IO_support   =  1 (32-bit)
  unmaskirq    =  1 (on)
  using_dma    =  1 (on)
  keepsettings =  0 (off)
  readonly     =  0 (off)
  readahead    = 16 (on)

I dont understand why it is like this. DMA, 32-bit is on. Its using a 
Promise TX2 UDMA/133 card. Should be enough. LG GSA-4120B is the burner 
model.

ide0: BM-DMA at 0xfc00-0xfc07, BIOS settings: hda:DMA, hdb:DMA
     ide1: BM-DMA at 0xfc08-0xfc0f, BIOS settings: hdc:DMA, hdd:DMA
     ide2: BM-DMA at 0xdf60-0xdf67, BIOS settings: hde:pio, hdf:pio
     ide3: BM-DMA at 0xdf68-0xdf6f, BIOS settings: hdg:pio, hdh:pio
hda: 240121728 s (122942 MB) w/2048KiB Cache, CHS=65535/16/63,UDMA(100)
hdb: 240121728 s (122942 MB) w/2048KiB Cache, CHS=65535/16/63,UDMA(100)
hdc: 240121728 s (122942 MB) w/2048KiB Cache, CHS=65535/16/63,UDMA(33)
hdd: 240121728 s (122942 MB) w/2048KiB Cache, CHS=65535/16/63,UDMA(33)
hdf: 320173056 s (163928 MB) w/2048KiB Cache, CHS=19929/255/63,UDMA(133)
hdg: 398297088 s (203928 MB) w/7936KiB Cache, CHS=24792/255/63,UDMA(133)

The burner is on hde. I use FC4 (2.6.10-1.770_FC3smp).
Anyone got a idea?

[Alan]

On Sat, 6 Aug 2005, Peter Magnusson wrote:
> I cant burn DVDR's faster than 1.30x or something like that. cdrecord says:
>
> cdrecord: DMA speed too slow (OK for 9x). Cannot write at speed 16x.
>
> hdparm says:
>
> /dev/cdwriter:
>   IO_support   =  1 (32-bit)
>   unmaskirq    =  1 (on)
>   using_dma    =  1 (on)
>   keepsettings =  0 (off)
>   readonly     =  0 (off)
>   readahead    = 16 (on)
>
> I dont understand why it is like this. DMA, 32-bit is on. Its using a 
> Promise TX2 UDMA/133 card. Should be enough. LG GSA-4120B is the burner 
> model.

Are you using an ide cable rated for 133?

[Peter Magnusson]

On Sat, 6 Aug 2005, alan wrote:
> > I dont understand why it is like this. DMA, 32-bit is on. Its using a
> > Promise TX2 UDMA/133 card. Should be enough. LG GSA-4120B is the burner
> > model.
>
> Are you using an ide cable rated for 133?

Yes, I only use new cables for all devices.

[James Wilkinson]

Peter Magnusson wrote:
> I cant burn DVDR's faster than 1.30x or something like that. cdrecord says:
> cdrecord: DMA speed too slow (OK for 9x). Cannot write at speed 16x.
>
> I dont understand why it is like this. DMA, 32-bit is on. Its using a 
> Promise TX2 UDMA/133 card. Should be enough. LG GSA-4120B is the burner 
> model.

alan wrote:
> Are you using an ide cable rated for 133?

Um. Sounds like a red herring to me. The drive only supports 33 MB/s.

The manual, which can be found at
http://us.lgservice.com/jsp/common/download.jsp?DOC_ID=KROWM000058431&FI...
(phew) says (page 10):

Performance:
Data transfer rate
*Sustained          CD-ROM : 6000 Kbytes/s (40X max)
                    DVD-ROM : 22160 Kbytes/s (16X max)
*Burst(ATAPI)       16.6 Mbytes/s (PIO Mode 4), (MULTI-DMA Mode 2)
                    33.3 Mbytes/s (Ultra-DMA Mode 2)

So 33 MB/s is all you're going to get out of the drive interface. And
this is enough for 16x DVD.

Hope this helps,

James.