Re: SONY or CD-ROM lying about speed?

Thierry Danis (danis@mail.dotcom.fr)
Sat, 6 Feb 1999 22:19:03 +0100

On Sat, Feb 06, 1999 at 04:37:34PM +0100, Jon K Hellan wrote:
> I have a SONY 32x CD-ROM CDU771. However, Linux reports it as 14
> speed. Apparently, FreeBSD does the same.
>

I've seen the same. Running a 'dd' over a complete CDROM
gives me a transfer rate around 2100 KB/s, which is x14.
I have a CD-ROM CDU701.

> I wonder what's the cause of this. SONY could by lying, but it sounds
> a little unlikely. Alternatively, the max speed the device reports may
> be wrong. Or is there some "overdrive gear" which may be invoked using
> black magic?
>
> Has anybody got ideas about this, and how to investigate?
>
> Jon

-- 
	Thierry Danis


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