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LVM partition table extensions

Cross-posted to 4 groups.

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My Boot Manager was already capable of taking partition names (for the 
MBR partitioning scheme) from the IBM Boot Manager MBR partition table 
extensions.  Thanks to information provided by Alex Taylor, I've now 
updated it so that it uses the IBM LVM metadata, falling back to the IBM 
Boot Manager partition table extensions if the IBM LVM metadata aren't 
there.  I've also updated DASDPART so that it does the same thing.

My test systems here don't have IBM's LVM.  The EFI partitioning scheme 
is the way of the future, and my test systems have EFI partition tables 
and MBR partition tables with no more than the original IBM Boot Manager 
extensions.  But Dave Yeo, whom I believe has OS/2 systems with IBM's 
LVM, was going to have a go with my Boot Manager.  I'm still waiting to 
hear back from him.  (You'll of course now need the new Boot Manager 
that I've just made, M. Yeo.)  I've added in the IBM LVM partition table 
support blind, and, in the absence of documentation as to the exact 
algorithm for locating the IBM LVM metadata (a point that we've 
discussed before, with reference to how something in Ubuntu tidies up 
container partitions in MBR partition tables to eliminate otherwise 
unusuable "holes" that waste space) this might require some tweaking to 
cover all possibilities, which of course I cannot do here without 
something to test against.  If you want to beat M. Yeo to the finishing 
post, drop me a line.  (-:

I say that the EFI partitioning scheme is the way of the future.  In 
fact, it's the way of the present, if one takes off the OS/2-tinted 
glasses.  The rest of the world is already going EFI, and has been for 
some several years now.  (My Boot Manager and DASDPART tool already 
understand EFI partition tables.)  So don't expect wonders in the way of 
OS/2 LVM partition table support.  I'm going to work a little more on 
incorporating the IBM LVM drive letter information into things like my 
Boot Manager.  But if you want an OS/2 LVM tool that will do all of the 
volume and partition management, M. Taylor is still the person to bribe, 
not me.  (-:

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LVM partition table extensions Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-04-29 22:29 +0100
  Re: LVM partition table extensions Roderick Klein <rwklein@xs4all.nl> - 2011-04-30 21:22 +0200
    Re: LVM partition table extensions Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-05-02 02:53 +0100
    Re: The meaning of "my". Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-05-02 02:53 +0100
  Re: LVM partition table extensions madodel <madodel@ptd.net> - 2011-05-01 20:21 -0500
    Re: LVM partition table extensions Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.COM> - 2011-05-02 23:17 +0100

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