"Poutnik" <email@example.com> wrote in message
> In article <D22409C1-9E61-4DF5-8DAE-CE6F22EB6D37@microsoft.com>,
> firstname.lastname@example.org says...
>> When you install Windows XP it always leaves at least 8MB of unallocated
>> space. I seem to remember that it had a possible functional use.
>> Do I need to do the same in Vista Home Premium?
>> Thank you
> I suppose it could be due to the fact
> a partition cannot start just behind MBR sector
> It must be aligned to beginning of the track.
> Some utilities are able to use these place for special purpose, e.g.
> backing up MBR.
The 8MB of unallocated space on a hard drive with a single partition is reserved
in case you want to convert the drive from a basic disk to a dynamic disk.
How To Convert to Basic and Dynamic Disks in Windows XP Professional
Quoting from the article.
"You must have at least 1 megabyte (MB) of free space on any master boot record
(MBR) disk that you want to convert. This space is automatically reserved when
the partition or volume is created in Microsoft Windows 2000 or Windows XP
Professional. However, it may not be available on partitions or volumes that are
created in other operating systems."
While this article was written for Windows 2000, it applies to XP as well.
Setup Reserves Disk Space for Upgrading to Dynamic Disk