Re: [Bug-ddrescue] Patch to support -d on Darwin and Mac OS X

[Antonio Diaz Diaz]

MacXperte wrote:
> Did this patch make it into the regular build of ddrscue yet or will it soon
> be integrated?

I have no intention of supporting more than one direct disc access 
method in ddrescue, and F_NOCACHE is an Apple-only feature. So I'm 
afraid the answeer is no.


> What is the advantage of direct-mode over using raw devices?
> What are the differences between those methods anyway?

It depends on the kernel. Ddrescue only requests direct disc access, it 
doesn't need to know how, or if, the kernel provides it.


> Why is the direct-mode not used on the first run but on the rerun in all
> examples?

Because direct disc access seems to be slower, but also seems to avoid 
sector clustering by the kernel, allowing the recovery of every good sector.


Regards,
Antonio.