Re: Wheezy Installer Auto-Partition Oddity
----- Original Message -----
> From: Roger Leigh <rleigh@codelibre.net>
> To: debian-user@lists.debian.org
> Cc:
> Sent: Friday, January 4, 2013 3:02 AM
> Subject: Re: Wheezy Installer Auto-Partition Oddity
>
> On Thu, Jan 03, 2013 at 10:15:09AM -0800, Patrick Bartek wrote:
>> Since my original post, I've been reading up on GPT. Based on that,
> plus
>> what others have posted here, it seems the cause of the gaps is a
> combination
>> of aligning partitions based 4096 byte sectors, regardless of whether they
>> are that size, and LVM needing unpartitioned space between partitions for
>> metadata whether you're using LVM or not. Mostly, the latter, I think.
>
> LVM does not use unpartitioned space for anything TTBOMK. It uses
> physical volumes (PVs) which are block devices (either partitions or
> whole disks or RAID arrays etc.). These are entirely self-contained.
> Internally, the PV contains its own metadata and extents which are
> allocated to individual logical volumes within the volume group
> containing the PV. It's simply impractical and fragile to use
> unpartitioned space, and LVM only uses the devices (partitions) you
> put the PVs on.
That was what I read--somewhere?--in an article on LVM. It was just one sentence mentioned in passing and was never detailed.
If using unpartitioned space is so "fragile" Why do the MBR or GPT, etc. use it? Seems to be a great place to "hide" data about something like a LVM partition that's not going to change frequently, and is beyond normal filesystem access. Just a thought.
B
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