VanLUG Email Archive
Vincent Janelle (malokai@gildea.net)
Sun, 26 Sep 1999 12:55:06 -0700 (PDT)
What kind of tasks are you performing? CDDA reads? Most ATAPI drives do
it at 1x or just slightly above that. Mind you, the ultraplex drives that
I've seen rip at something around the area of 20x..
It also has to deal with the issue that the processor has to do the
copying for IDE transfers(or at least has to initiate it for UDMA).. The
operating system buffers a lot, but it gets to the point where the OS has
to write the data to your other drive.. That'll stop the cdrom drive while
the hard drive performs its write.
So on an so forth..
I noticed that my cd writer at work (plextor 4x writer, 6x reader) was
able to rip a cd faster than the '40x' IDE cdrom drive at rougly 50%
higher rates..
You should see the vmstat output when copying that much data around =)
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On Sun, 26 Sep 1999, Roberto Pavan wrote:
> Melissa Tan wrote:
>
> > I doubt that the box would actually say what the read/write speed of the
> > drive really is... I think the 50X applies more RPM. It's 50 times faster,
> > but they don't really put what 1X speed is on the box either. Unless it's
> > SCSI, I wouldn't get a 50X CDROM drive.
>
> FWIW, my 16x SCSI CDRW definately reads faster than my 24x ATAPI CDROM. No
> contest. Takes a tad longer to get ready after inserting a CD, though.
> --
> Your faithful narrator,
> Roberto Pavan rpavan@home.com
>
> In some countries what I do is considered normal.
>
This archive was generated by hypermail 2.0b3 on Mon 15 Nov 1999 - 09:39:28