Eddie Maddox wrote:
> CD-Writer read speed?
Varies depending upon what track you're on. Outer tracks spin more bits past
the laser during the course of a revolution. This has changed with the newer
high-speed CD readers, which use a variable-speed spindle in order to get a
constant bit-rate (thus the reason you can hear them whine into a higher gear
as the head moves inwards), but CD writers are generally slow enough that they
don't need, or want, to do that.
> Earlier on a 311 MB ISO image written to a CD-R at speed=8 the write took
> 5 min, the verify took 12 min. I took the CD-R out of the machine. Later I
> put it back in and did the very same verify. 4 min! What accounts for a
> difference in 8 min. reading half a CD, all else being equal?
What else is going on in the system? Are you sure that the OS knows that you
took it out and put it back in, and flushed its buffers between attempts to
read it? Or are you measuring the speed of your OS's buffer mechanism?
--
Eric Lee Green http://members.tripod.com/e_l_green
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