Re: DVD Disk Detection

H. Peter Anvin (hpa@zytor.com)
29 Jan 2001 17:10:31 -0800

Followup to: <Pine.LNX.4.21.0101291759200.6259-100000@penguin.linuxhardware.org>
By author: Kernel Related Emails <kernel@penguin.linuxhardware.org>
In newsgroup: linux.dev.kernel
>
> I was just wondering if anyone had any suggestions to check to see if a
> DVD is in a users DVD drive. Currently if you run a CDROM_DISC_STATUS on
> a DVD you get a CDS_DATA_1 returned. What kernel level call would
> destinguish between an actual Data CD and a DVD?
>

Why does it matter? Seriously, do you have any reason to act
differently between a CD and a small DVD, either of which contains a
UDF filesystem? If not, don't.

Size, type of filesystem, etc, are obviously important -- but
shouldn't be determined by the type of the physical media. It's
perfectly legitimate to have a large ISO 9660 filesystem on a DVD, or
an UDF filesystem on a CD.

-hpa

-- 
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