[svlug] svlug] Detecting 'virgin' disks ?

R P Herrold herrold at owlriver.com
Tue Jul 26 13:43:10 PDT 2005


On Tue, 26 Jul 2005, Steve wrote:

> Anyone know a 'safe' method for detecting 'virgin' disks (disks that
> have never been formatted...)

> With a brand new disk, is the entire disk zeroed out ? (ie can I just dd
> the MBR and compare it to all zero's or all ones ?

Rather than a hard to satisfy and potentially irrelavant 
condition (all zeros), checking for the _absence_ of the 
'magic number' placed by fdisk and friends, [this varies, 
depending on the target OS and arch], seems a better idea.

-- Russ Herrold




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