Re: SONY or CD-ROM lying about speed?

Jens Axboe (axboe@image.dk)
Sun, 07 Feb 1999 19:17:35 +0100

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Maybe in reply to: Jon K Hellan: "SONY or CD-ROM lying about speed?"

Mark Lord wrote:
> Thierry Danis wrote:
> >
> > 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.
>
> The PIDENTIFY_DEVICE command is sent to the drive,
> and one of the data fields returned is "drive maxspeed"
> which in this case the drive sets to "14 x 176KB/sec"
> (176KB/sec = 1X or "original" CD speed).
>
> Linux just displays what the drive told it.

It's a Sony problem - I've got a CDU611 (which is a 20x drive) and
it reports 10x speed. Besides, performance isn't affected by the
reported speed.

-- * Jens Axboe <axboe@image.dk> * Linux CD-ROM Maintainer * "The only thing that interferes with my * learning is my education." -- A. Einstein

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Maybe in reply to: Jon K Hellan: "SONY or CD-ROM lying about speed?"