Do you have to have CD-RW with a CD-ROM

  • Thread starter Thread starter jm
  • Start date Start date
tomcas said:
John
Is this reference wrong?
http://www.pcguide.com/ref/hdd/if/ide/confPerformance-c.html

"Hard Disk and ATAPI Device Channel Sharing: There are several reasons
why optical drives (or other ATAPI devices) should not be shared on the
same channel as a fast hard disk. ATAPI allows the use of the same
physical channels as IDE/ATA, but it is not the same protocol; ATAPI
uses a much more complicated command structure. Opticals are also
generally much slower devices than hard disks, so they can slow a hard
disk down when sharing a channel. Finally, some ATAPI devices cannot
deal with DMA bus mastering drivers, and will cause a problem if you try
to enable bus mastering for a hard disk on a channel they are using. "

Tom
Click to expand...

Could that be really old? Even my old 4x CDRW could do DMA.
 
Are you saying that serial ATA does not suffer from this slow down or
are you saying you have 4 IDE channels which allows you to set up CD
drives on separate channels.
Click to expand...

Yes...but the drive will only trasfere data as fast as the device sending
it, such as a CD-ROM.
But the drives are not connected to any IDE physical interface.


I didn't know there were any SATA CD drives
out there but I do know the benefit of having and onboard RAID
controller even if its not serial or used in RAID configuration. I'm
running an Asus A7V133 and A7V333 with on board Promise controllers for
just this reason.
Click to expand...

Phillips have been showing a demonstration of a SATA DVD-RW optical drive,
real time video streaming and burning. They also used the new Seagate SATA
II hard drives and latest Silicon Image controller.
 
tomcas said:
John
Is this reference wrong?
http://www.pcguide.com/ref/hdd/if/ide/confPerformance-c.html

"Hard Disk and ATAPI Device Channel Sharing: There are several reasons
why optical drives (or other ATAPI devices) should not be shared on the
same channel as a fast hard disk. ATAPI allows the use of the same
physical channels as IDE/ATA, but it is not the same protocol; ATAPI
uses a much more complicated command structure. Opticals are also
generally much slower devices than hard disks, so they can slow a hard
disk down when sharing a channel. Finally, some ATAPI devices cannot
deal with DMA bus mastering drivers, and will cause a problem if you try
to enable bus mastering for a hard disk on a channel they are using. "

Tom
Click to expand...

Look at the date of this reference:
The PC Guide (http://www.PCGuide.com)
Site Version: 2.2.0 - Version Date: April 17, 2001
 
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