Re: [Bug-ddrescue] Slow reads for x time to exit and whitespace skipping

[Paul Daniels]

On 26/01/17 08:20, Rog Fanther wrote:
> My 2 cents :
>
> What would constitute an "empty" part ? Sometimes, blocks filled with 
> 00 or FF or any value may be legitimate parts of a file.
> To know which blocks are really used for files, ddrescue would have to 
> analyse the filesystem allocation and, at least to me, that seems to 
> disrupt the idea of cloning the disk.

You could specify.  Usually you can see it quickly enough when you're 
recovering the drive; so you could provide a sample block or 
byte-sequence for ddrescue to match against, and ddrescue defaulting to 
just a full block of 0x00.



> ----- Original Message ----- From: "Antonio Diaz Diaz" <address@hidden>
> To: "Cameron Andrews" <address@hidden>
> Cc: <address@hidden>
> Sent: Wednesday, January 25, 2017 11:11 AM
> Subject: Re: [Bug-ddrescue] Slow reads for x time to exit and 
> whitespace skipping
>
>
> > Hi Cameron,
> >
> > >
> > Skipping the empty parts of the drive will have to wait until 1.23. I 
> > also will need more feedback about how should ddrescue decide if a 
> > block is empty.
> >
> > Thank you very much for your donation.
> >
> >
> > Best regards,
> > Antonio.
> >
> >
> > _______________________________________________
> > Bug-ddrescue mailing list
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> > https://lists.gnu.org/mailman/listinfo/bug-ddrescue 
>
>
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