Re: Parted 1.6.21 finds partitions on DVD-ROM drives -- Bug or feature?

[Buttchereit, Axel (XL)]

Andrew Clausen wrote:
> On Wed, Mar 02, 2005 at 10:24:01PM +0100, Bernhard Rosenkraenzer wrote:
> 
>>SSIA -- this code fragment
>>
>>PedDevice *dev=0;
>>while(dev=ped_device_get_next(dev)) {
>>      puts(dev->path);
>>}
>>
>>Prints out all my harddisks as expected - but additionally, it prints all 
>>DVD-ROM drives that have a disk in them, and even claims there's a partition 
>>(which is obviously not true). (e.g. I get
>>/dev/hda1     [Correct -- my swap partition]
>>/dev/hda2     [Correct -- my / partition]
>>/dev/hdc1     [Incorrect -- /dev/hdc is my DVD-ROM]
>>)
>>
>>Verified on Linux 2.6.11-rc5-mm1, parted 1.6.21.
>>
>>Is this a bug or some sort of feature I fail to understand?
> 
> 
> Probably the latter.  i.e. The DVD probably has a partition table on it.
> (I don't have a DVD drive, so I wouldn't know!)  If you send me
> the first 512 bytes of the DVD, I can check:
> 
>       dd if=/dev/hdc of=dvd-image bs=512 count=1
> 
> 
>>If it's a feature, what's the best way to get only harddisks? I'm currently 
>>checking for sector_size==2048, but that's suboptimal...
> 
> 
> No idea.  If you find an answer, please let me know!  Perhaps attempting
> to open it read/write?
> 
> Cheers,
> Andrew

Does "cat /proc/sys/dev/cdrom/info" help? 

--Axel