> > Basically anything that is '0' will just get marked that way and not saved. But as
> > you use a drive stuff gets data but not accessible anymore as delete is just
> removing
> > the pointer to the data not the data.
>
> AFAIK VHD and similar formats do not save data if it's not allocated in the MFT (or
> whatever table corresponds to the formatting of the partition).
That would not very well work then. As virtualpc is basically an emulator where the format came from. One of the people who made up CHD had his hand that one too. It is basically a 1:1 copy with 0 pages removed similar to VDI and VMDK. You can literally take the VHD that MS backup makes and mount it in a virtual machine and see everything.
>
> > SSDs uses trim that really does 0 it out in the
> > background for you. Normal HD's dont.
>
> That's not a plus, but a limitation of SSDs, which need to zero out every
> page/cluster before using it again. Using trim in the background speeds up the
> process of finding the right page to write directly instead of having to clean and
> then write, which would be slow. The trim command wasn't needed in mechanical hard
> disks so it didn't exist.
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Re: Can't make a backup >:-/
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Can't make a backup >:-/
