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Re: [Dvdrtools-users] Re: [Fwd: Re: Is my MSI DR8-A2 broken?]
From: |
Svante Signell |
Subject: |
Re: [Dvdrtools-users] Re: [Fwd: Re: Is my MSI DR8-A2 broken?] |
Date: |
Tue, 03 Jan 2006 19:29:16 +0100 |
On Tue, 2006-01-03 at 08:24 -0800, Bryan J. Smith wrote:
> Svante Signell <address@hidden> wrote:
> > No I did not, The file size is 4685914112 bytes which is
> > less than 4.7 GB.
>
> Is that the size of the ISO file?
> Or is that the size cdrecord reports?
In fact the file size given was with a DVD structure on the hard disk
and the size was given by du -sb dir_name. I don't have the .iso file
saved any longer, but it was created from the same file structure as
above, with mkisofs -dvd-video -o file.img. I did manage to burn this
image to a DVD+RW, but DVD+-R failed due to the broken MSI burner.
> > Do you say that if I write a file located in /dev/hdc and
> > the writer is at /dev/hdd, i should disable DMA for both
> > drives?
>
> Not exactly.
>
> What I said was you should _never_ put DMA devices in a
> master/slave relationship, but 1 device per channel.
The drive can only be mounted with Master/Slave straps set or in Cable
Select. Are you proposing Cable Select here?? I don't think so!
> > This would then apply to all burners installed in PC, Linux
> > Windows, etc computers.
>
> Yes! ATA in DMA mode means the Integrated Drive Electronics
> (IDE) of the drive is talking directly to the system memory.
> That's why you should _never_ have more than 1 device per
> channel. Because it requires a major change in the bus
> operation, which often results in bus resets.
>
> > What about the case of copying files from one hard disk to
> > another, for example /dev/hda to /dev/hdb? In that case the
> > file transfers should never finish.
>
> Huh? How did you get that logic? I never even suggested
> such.
>
> /dev/hda takes control of the bus, negotitates DMA and writes
> to memory. /dev/hdb then takes control of the bus,
> negotiates DMA and reads from memory. Just because the
> operation requires a major context switch and cannot occur
> simultaneously doesn't mean it doesn't finish.
>
> It just doesn't happen simultaneously. If you have a
> real-time process like DVD recording, then that's a serious
> issue.
>
Can you explain the difference with file transfer between /dev/hda
and /dev/hdb using DMA with writing a file on /dev/hdc to a burner
at /dev/hdd using DMA then!
Thanks,
--
Svante Signell <address@hidden>
- Re: [Dvdrtools-users] Re: [Fwd: Re: Is my MSI DR8-A2 broken?], Svante Signell, 2006/01/03
- Re: [Dvdrtools-users] Re: [Fwd: Re: Is my MSI DR8-A2 broken?], Bryan J. Smith, 2006/01/03
- Re: [Dvdrtools-users] Re: [Fwd: Re: Is my MSI DR8-A2 broken?],
Svante Signell <=
- Re: [Dvdrtools-users] Re: [Fwd: Re: Is my MSI DR8-A2 broken?], Bryan J. Smith, 2006/01/03
- Re: [Dvdrtools-users] Re: [Fwd: Re: Is my MSI DR8-A2 broken?], John, 2006/01/04
- [Dvdrtools-users] ATA, IDE, device, controller and other concepts -- WAS: Is my MSI DR8-A2 broken?, Bryan J. Smith, 2006/01/04
- [Dvdrtools-users] Re: ATA, IDE, device, controller and other concepts -- WAS: Is my MSI DR8-A2 broken?, John, 2006/01/19
- Re: [Dvdrtools-users] Re: ATA, IDE, device, controller and other concepts -- WAS: Is my MSI DR8-A2 broken?, Bryan J. Smith, 2006/01/21