Re: [Bug-ddrescue] [Bulk] Re: Tip: Improving recovery chances with Seagate "F3" models

[Scott Dwyer]

On 6/4/2014 1:35 PM, Antonio Diaz Diaz wrote:
> I mean passing an option to configure as in:
>   ./configure --enable-passthrough && make && make install
>
> This way everybody else gets a normal ddrescue built.
I am not yet sure how to do that, but I would assume that it would still 
involve using conditional compilation code like I mentioned. But I could 
be wrong. I am sure it could be figured out.

But my patch will not do anything different unless the user actually 
uses an option in the ddrescue command line. Just like --direct must be 
manually selected, so would --scsi-passthrough and --ata-passthrough, 
and I would not include an easy single letter that would enable it so it 
would have to be fully typed out (could even add a 
"yes-i-know-what-i-am-doing" switch for added safety). I would not even 
consider making a patch that did not make the passthrough an option that 
had to be intentionally selected.

> Ddrescue already works like this. It is the kernel the one returning a 
> total block failure when it finds a bad sector. I wish the kernel 
> behaved better in case of read error. (Maybe some kernel version 
> behaves as you describe. I don't know).
We will definitely talk about this more when I am finally ready for it.

Scott