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Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B
From: |
Bryan J. Smith |
Subject: |
Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B |
Date: |
Thu, 29 Dec 2005 15:56:21 -0800 (PST) |
Samson Lee <address@hidden> wrote:
> Hmmmm.. Just to confirm, are you also using cdrecord-prodvd
> 2.01b31 with LG GSA4167? Or are you using one of the
> 'unofficial' dvd patches?
Unofficial because it works flawlessly with the GSA-408x and
GSA-416x series.
> The drive is on secondary master. The hard drive with the
> .iso is on secondary slave. All devices are running udma2.
Bam! That's your problem. You will run into a noticable
performance issue when you are doing DMA from one device to
another on the same channel. Especially from the
all-important latency aspect.
And that's assuming the ATA v. ATAPI devices and their
different vendor/model quirks aren't already in-fighting and
reseting the ATA bus (which is detrimental to performance).
Trust me on this, put each device on their own channel, and
you will avoid performance issues. You should _only_ use the
master/slave relationship for PIO (which is slow and CPU
intensive), and _never_ for DMA -- or in the worst case,
never for transfers occurring from both devices on the same
channel simultaneously.
ATA is not SCSI. It does _not_ do device-to-device
transfers. One ATA device must take control of the bus,
setup the registers for transfer, transfer to memory and give
up the bus -- while the other device then does the same. The
acquisition of the bus is the main issue -- especially when
data is trying to be fed to the recorder in real-time, while
the HD is trying to transfer into memory.
> # hdparm -i /dev/hdc
> /dev/hdc:
> Model=HL-DT-ST DVDRAM GSA-4167B, FwRev=DL10,
> ...
> UDMA modes: udma0 udma1 *udma2
> AdvancedPM=no
> Drive conforms to: device does not report version:
> * signifies the current active mode
And "hdparm -i /dev/hdd"?
--
Bryan J. Smith Professional, Technical Annoyance
address@hidden http://thebs413.blogspot.com
----------------------------------------------------
*** Speed doesn't kill, difference in speed does ***
- [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B, Samson Lee, 2005/12/29
- Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B, Bryan J. Smith, 2005/12/29
- Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B, Samson Lee, 2005/12/29
- Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B, Bryan J. Smith, 2005/12/29
- Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B, Samson Lee, 2005/12/29
- Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B,
Bryan J. Smith <=
- Re: [Dvdrtools-users] Problem burning to LG DVDRAM GSA-4167B, Samson Lee, 2005/12/29
- [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- DVD+R != DVD-R, Bryan J. Smith, 2005/12/29
- [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- DVD+R != DVD-R, Samson Lee, 2005/12/29
- [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- DVD+R != DVD-R, Bryan J. Smith, 2005/12/30
- Re: [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- DVD+R != DVD-R, Volker Kuhlmann, 2005/12/30
- [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- ProDVD only does DVD-R, Bryan J. Smith, 2005/12/30
- Re: [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- ProDVD only does DVD-R, Volker Kuhlmann, 2005/12/30
- Re: [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- ProDVD only does DVD-R, Bryan J. Smith, 2005/12/30
- Re: [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- ProDVD only does DVD-R, Volker Kuhlmann, 2005/12/31
- Re: [Dvdrtools-users] Re: Problem burning to LG DVDRAM GSA-4167B -- ProDVD only does DVD-R, Bryan J. Smith, 2005/12/31