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SATA Hard Drive recognised in Computer Management, but not Windows Explorer

I have a hard drive that was formatted within Vista 64-bit, SP1 which I have now installed in a 2nd computer running Windows XP Pro SP3. This data hard drive is recognised in BIOS, and in Control Panel > Administrative Tools > Computer Management, but not in Windows Explorer. Curiously, the drive in question shows with no drive letter in Computer Management (it was P when it was originally in Vista). Computer Management also describes the drive, under 'Status', as GPT Protective Partition, which I've never seen before.

Is there a way to proceed that enables the use of the drive in XP and keeps all my data intact?
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zulu9812
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zulu9812
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4 Solutions
 
jpquonceCommented:
You probably already know this, but GPT disks are supported as data disks (not boot) under Windows Vista, XP-64.

Also GPT disks cannot be turned back into ordinary (MBR) disks while preserving data, which is what you would need to do to get XP to see it properly.
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willettmeisterCommented:
I don't think you are going to be able to read the drive.  If I am not mistaken Vista uses a newer version of NTFS that has features that XP doesn't understand hence the issue reading the drive.  Obivously you are able to see the disk but XP doesn't understand the formatting.  Similar to if you were to try to read a Unix ext3 formatted disk in XP.
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houssam_balloutCommented:
had you assign a driver letter to that drive?
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zulu9812Author Commented:
jpquonce, willettmeister:

I was afraid of that.

OK, what if I did this?

Get a new hard, blank HDD same size
Format it NTFS in XP
Put it in + drive P in my Vista comp
Copy all files from drive P to the new, blank one
Take the new drive (call it drive Q now) back into XP, which should be readable?
Take drive P, which will now be blank, back into my XP comp - drive P still won't be readable
Boot XP comp from XP disc, format drive P from there

Net result:

drive Q readable in XP and Vista, contains data formerly of drive P
drive P readable in XP and Vista, now blank and ready for new data

Does that sound about right?
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TonyStCommented:
Yes, that would probably work as the Vista system will be able to read and write to the XP formatted NTFS partition.  Just make sure you have your stuff before you format your old Vista drive.
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jpquonceCommented:
That should work. I would do a copy instead of a move just in case. But as for the one drive you should be able to just Right click it in Disk Managament and format it from there it will just warn you that you will lose everything.

SO either get a new HDD or get and eternal drive and format that in xp and copy data to that. External drives are always handy for stuff like this.

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zulu9812Author Commented:
jpquonce:

I can't format drive P in XP because when I right-click on it in computer management all the options except Properties are greyed out.
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TonyStCommented:
I'm assuming that this drive your trying to format has no data on it.  If that is the case then on the XP machine goto the disk manager and kill the partition. Then recreate it, the format it.
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jpquonceCommented:
Try this:

open a command prompt
type in "diskpart" then hit enter
list disks with the "list disk" command
select the disk you want to clean with the select disk command
clean the disk with the clean command.

THen it should allow you do format it through disk management. But make sure you have all your stuff off it by then.
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oswaldofarithCommented:
If you don't want to preserve the data, use the DiskPart tool on the XP command line:

use list disk to find the volume number of the GPT volume, then use select to focus on it

then use the clean function and then exit the tool

***WARNING*** ALL DATA WILL BE LOST ***WARNING***

now you can create a new partion and format it.
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FootprintitCommented:
OP what details are available under disk management? If you are able to delete the partition under XP in disk management then reformat it under disk management you should be OK.

Vista should see it after that as well.
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