newfs_msdos and dvd-ram (fwsectors, fwheads)

Poul-Henning Kamp phk at
Thu Feb 21 22:33:40 UTC 2008

In message <47BD6F39.7080105 at>, Andriy Gapon writes:
>on 17/02/2008 13:39 Andriy Gapon said the following:

>I see two approaches:
>1) fake those properties in device drivers, primarily cd(4) and acd(4);
>   benefit: this can help other utilities besides newfs_msdos


The geom attributes are provided if they are available only.

It is the responsibility of the application code to decide
and handle their absence.

>2) fake those properties in newfs_msdof;
>   benefit: this would help with other physical devices that can host
>   FAT;

This is the way to do it, but it might make sense to make a library
routine do it, to get consistent behaviour.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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