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Posted by root on 04/01/07 10:50
Thanks for responding.
Eamon Skelton <Xnospam@oceanfree.net> wrote:
> On Sat, 31 Mar 2007 00:44:42 +0000, root wrote:
>
> DVD-RAM is very slow compared to DVD+/-R. Write verification doubles
> the recording time and 12x media is as rare as hen's teeth.
>
I have a BenQ that reads DVD-RAM at 6.9 Mb/s which *is* 5x. An
Optiarc [NEC/Sony] reads almost as fast. These are almost three
times the speed of the Pioneer.
>
> It should write Verbatim 16x at 18x CAV. The CDFreaks review shows
> burn times of just over 5 minutes for Verbatim 16x media.
> http://www.cdfreaks.com/reviews/Pioneer-DVR-112-DVD-Burner-Review/
>
It should write that fast but it doesn't.
>
> Are you using your Linux PC for DVD burning? Try running as root:
> "hdparm -i /dev/hdx" where 'x' is the device for your DVD drive.
>
> I get:
> debian:/home/skelton# hdparm -i /dev/hdd
>
> /dev/hdd:
>
> Model=HL-DT-STDVD-RAM GSA-H22N, FwRev=1.02, SerialNo=
> Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
> RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
> BuffType=unknown, BuffSize=0kB, MaxMultSect=0
> (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
> IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
> UDMA modes: udma0 udma1 udma2 udma3 *udma4 udma3 *udma4
> AdvancedPM=no
> Drive conforms to: Unspecified:
> ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5
>
> * signifies the current active mode
>
>
/dev/hdd:
Model=PIONEER DVD-RW DVR-112D, FwRev=1.09, SerialNo=
Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=13395, BuffSize=64kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4
AdvancedPM=no
Drive conforms to: unknown:
* signifies the current active mode
> Make sure that you have an 80 wire IDE cable and that you have the
> correct chipset drivers for your IDE and/or SATA controller.
>
> You can check your hard-drive read performance with:
> "hdparm -t /dev/xdx" where 'x' is the correct device name.
> This is most likely /dev/hda for IDE and /dev/sda for SATA
>
> Typical speeds are between 40 and 80MB/S.
>
> Here is the result for my SATA drive:
> /dev/sda:
> Timing buffered disk reads: 226 MB in 3.02 seconds = 74.86 MB/sec
>
/dev/sda:
Timing buffered disk reads: 230 MB in 3.00 seconds = 76.66 MB/sec
I can't share the cdfreaks rave review. Since the BenQ and Optiarc
drives do read RAM at 5x, I wonder if Pioneer sets the max read
speed to be the stated write speed. My RAM disks are Panasonic
2-3x.
The relevance to this ng is that I take material recorded on RAM
using a Panasonic DVDR and edit it on the computer.
Again, thanks for the trouble you went to for your response.
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