Re: dd question (from man page)

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On 11/17/2014 11:28 AM, jd1008 issued this missive:
> Man page says:
> ...
> 
>        fdatasync
>               physically write output file data before finishing
> 
>        fsync  likewise, but also write metadata
> 
> 
> There is no explanation about this, as dd is supposed to be agnostic
> about the type of the data.
> 
> If a disk is being dd'ed  out to a file and the disk is mounted,
> (which is a BAAAAD thing to do), then even there, dd is agnostic
> about FS data and FS metadata.
> 
> So, what data and metadata is the manpage talking about?

I believe it's referring to LVM or BIOS RAID metadata.
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