Re: Partitions

[Stephen Powell <zlinuxman@wowway.com>]

On Fri, 09 Aug 2013 09:58:19 -0400 (EDT), Klaus Jantzen wrote:
> 
> by "some magic" the partitions on a HDD receive a block-id
> or UUID (for fstab).
> 
> Does the ID of a partition change when the partition is moved
> or when a new partition is created in the unallocated space
> between two partitions?
> 
> Thanks for any info.

The UUID is assigned when the partition is formatted, not when
it is allocated.  Commands such as mke2fs or mkswap do the
formatting.  Moving or resizing a partition will not change its
UUID, nor will allocating or deallocating another partition
in any location.  However, reformatting the partition will
normally change its UUID unless the old UUID is explicitly
specified as an option during formatting.  For example, I've heard,
though I have not personally verified it, that the Ubuntu installer
has a habit of reformatting swap partitions during installation
that were originally created by the Debian installer, thus messing
up the Debian system's use of the swap partitions.

-- 
  .''`.     Stephen Powell    
 : :'  :
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