Hi, Koflach.
You do mean Disk Management, right? My favorite way to run DM is to press
Start, type "diskmgmt.msc" and press Enter. When I enter Disk Management
through Control Panel | Administrative Tools | Computer Management | Disk
Management, not only does it take more effort, but then its display has so
much other information using up the screen real estate that I feel like I'm
working laparoscopically - or through a keyhole. :>(
You know, of course, that 1 TB does not equal 1,000 GB. Because of rounding
and converting binary and decimal numbers, my 1 TB Seagate starts out with
931.51 GB, per DM. How many GB did your drive start with? That number
should be in the left-hand column of the Graphical View in DM.
Tell us about existing partitions on that HDD: How many partitions and how
large? Were they created and formatted in WinXP, or in Vista? Do they show
anything in the Status column other than "Healthy"?
Is the color bar over the 859 GB colored Black for Unallocated, or Green for
Free space? The terms sound synonymous to me, but DM seems to indicate that
there is a difference - although I haven't found the difference explained in
the Help file. I note that the only "Unallocated" space shown in my system
is the 8 MB at the end of my USB ReadyBoost flash drive, which I understand
is reserved for system use. All the areas outside any partitions on my HDDs
are labeled "Free space". So, just in case it does matter, what does DM say
about your 859 GB?
The Help file in Disk Management has a full page on "Move Disks to Another
Computer". Perhaps something in this page will hold the clue to your "can't
format" problem.
Please post back and let us know how this works out for you.
RC
--
R. C. White, CPA
San Marcos, TX
Microsoft Windows MVP
Windows Live Mail 2009 (14.0.8064.0206) in Win7 Ultimate x64 RC 7100
"Koflach" <> wrote in message
news:...
>
> I recently installed Vista Home Premium and one of my hard drives is not
> showing all the space that it use to. The hard drive in question is a 1
> Tb hdd and was working fine in XP as were the other HDD's. When I
> installed Vista, all the other disk's worked fine except for this one.
> I have gone into Computer Management and it shows the drive as having
> 859 Gb of unallocated space that I cannot format. I am unable to create
> a New Simple Volume or any other volume types for this drive.
>
> Can anyone help me with this? Do you need more info from me?
>
> Thanks everyone.
>
>
> --
> Koflach