Archived from groups: alt.comp.hardware.pc-homebuilt (
More info?)
I thought I said that!
"Shep©" <nospam@nospam.net> wrote in message
news:btvao0po6ufq4k7csb1b96gpepr9hkdfs3@4ax.com...
> On 31 Oct 2004 19:09:19 GMT There I was minding my own business and
> then Lordy <spam_box@gmx.co.uk> wrote :
>
>>Current Setup
>>
>>OS Windows XP + Mandrake 10.1
>>
>>IDE Controller 1:
>> Primary: 80G Seagate ATA 100
>> Slave: 80G Seagate ATA 100
>>
>>IDE Controller 2:
>> Primary: DVD Writer: NEC 2510 ATA 33
>> Slave: DVD Rom/CD Writer Combo Liteon ATA 33
>>
>>I want to improve on the fly copying. If I put a HD on the same cable as
>>the DVD-R would this significantly affect HD->DVDR when they are on the
>>same controller? Can XP (and Mandrake) keep the HD at UDMA 5 and deliver
>>ample throughput to the DVD Writer?
>>
>>
>
> Constantly misunderstood relationships of IDE controllers and
> incorrect but normal build configurations by PC builders have caused
> this situation.
>
> When OEM builders or even Commercial PC builders put PCs together 99%
> of the time they stick the CD/CDR/DVD drives on the same IDE
> port/cable merely for convenience of build.
>
> This is,"NOT" the optimal configuration for most people especially
> these days.
>
> If you are doing a lot of,"On-The-Fly" recordings,copying then you
> want the CD/DVD drives on separate IDE ports.
> My setup.
>
> IDE zero Hard drive Master Standard CD slave.
> IDE one Hard drive Master CDR/W drive slave.
>
> On-the Fly recordings are at full speed because both devices
> are,"Parents" when burning.
> Image files are kept on my Main C drive which is my fastest and burnt
> to my CDR/W drive on my 2nd IDE port.Again at the time of burning both
> devices are,"Parent" devices.
>
> To understand this this is how IDE chains work.
>
> Single device on an IDE port is a,"Parent" e.g can read and write at
> the same time across the data busses.Therefore it has
> no,"Wait-States".
>
> As soon as there are two devices on an IDE port they both
> become,"Child" devices however they are only,"Child" devices if,"Both"
> are being accessed at the same time.
>
> A child device cannot read and write at the same time and
> therefore,"Wait-States" occur.This is where the time goes when burning
> large files.
> One device will read a lump of data and then the other device
> will write it but it has to wait until the 1st device has read it
> before it can write it.
>
> Now here's the thang(and the common misconception).
> Just having two devices on the same IDE port/chain of differing speed
> will not slow down the faster device(usually the hard drive) if the
> slower device is not being accessed.To all intents and purposes the
> device,"Not" being used at that moment is invisible.
>
> All possible hardware configurations have been tried and tested to
> support this.
> Quick example.
>
> 650 meg data CD on-the-fly burn with CD and CDR on same IDE port/chain
> 24X around 10+ mins
> Same file CD on IDE zero and CDR/W on IDE one 4 mins.
> The reason it's less than half the time is because of other
> factors,not just the wait-states but also the separate IDE chains will
> also use RAM more efficiently because of (U)DMA)
>
> Note:all drives regularly defragged and all redundant large files
> removed from drives to make sure swapfile/pagefiles can do their job.
> For win95/98/ME users also click here,
>
http://www.geocities.com/sheppola/easy.html
>
>
> Also of the above assumes that all devices are running in their
> correct(U)DMA modes.
> To check that your drives are download the small:free
> ,"Nero-Info-Tool",
>
http://www.geocities.com/sheppola/diag.html
>
> The program does not need to be installed and can even be run from
> within the .zip file.Under it's,"Configuration"tab it will give the
> correct information about your system's drive modes.
> HTH
>
>
>
> --
> Free Windows/PC help,
>
http://www.geocities.com/sheppola/trouble.html
> remove obvious to reply
> email shep@obviouspartyheld.de
> Free original songs to download and,"BURN" :O)
>
http://www.soundclick.com/bands/8/nomessiahsmusic.htm
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