Re: A few thoughts on hfsplus dev (Re: [PATCH v2] hfsplus: add journal replay)

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On 5 April 2014 03:02, Hin-Tak Leung <htl10@xxxxxxxxxxxxxxxxxxxxx> wrote:
>>> - I have a more re-produce'able recipe of making disk images with strange
>>> location of 2nd volume header using hdiutil (Apple's loopback mounting, etc disk image
>>> manipulation tool). At some point we should re-visit this issue.
>>
>>Well, present your recepie. But! There is only one proper placement for this header. All other placements are improper, and the spec even explicitly gives one example of an improper placement. I imagine no ways to get it wrong. I see no need for any elaborate code for finding the 2nd header.
>>
>
> Apple owns the spec, and owns the rights of interpretation and mis-interpretation of it,
> and they are not bound by it, and they can freely deviate and change their minds, etc. it
> is not an iso spec, it was not submitted to external bodies for standardization - it
> is just provided as is.
>
> You can say Appple's tool is wrong - but a more pragmatic way of seeing it, is that
> they don't have to keep the spec up to date or correct; keeping the spec up to date
> is going to cost somebody's time to do so; there is no business incentive to
> spend the engineering hours to keep the spec up to date. Their tools/implementations
> in software is more authoritative than the words in the spec.
>
> hdiutil is Apple proprietary software. source code is not available.

So what is the recipe? I'll make a patch if there really is a bug in the driver.
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