Re: [Bug-tar] Issue with GNU Tar and HP-UX LVM v2.2 filesystems

[Joerg Schilling]

Nathan Stratton Treadway <address@hidden> wrote:

> The point is that GNU tar doesn't know that the files you are trying to
> back up are on an LVM volume, and thus doesn't do any special processing
> like trying to look up LVM metadata for them.

On a system that is POSIX compliant, there is no need to know this.

> Essentially, all tar does is request the "stat" information from the OS
> for each file and directory it's processing, and then uses the device id
> (and lots of other fields) taken out of that information.
>
> So it sounds like then HP/UX LVM 2.2 is used, the device id that gets
> assigned to a volume is unusual in some way that causes trouble for
> tar... but the issue ties back to the values returned by the standard
> "stat" function call, and not to some attempt by tar to parse the LVM
> metadata or whatever.

As "TAR" is defined to archive dev_t values as unsigned values, the observed 
problem is a GNU tar specific problem that does not apply to tar.

Jörg

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