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Windows 7: Hard Drive Problem - 500 GB Disk - only 371 GB un-allocated space ??

25 Jul 2013   #1
BigFatBoy

W8x64Pro
 
 
Hard Drive Problem - 500 GB Disk - only 371 GB un-allocated space ??

I know that HDD manufacturer's use one unit of measurement while OS's use another unit of measurement for HDD disk capacity. I expect my "500GB" drive to have about 465 GB of actual free space. Yet Windows, DISKPART, and (3) different hard drive testing software programs all indicate that the actual free space on the *used HDD I am installing is reported at 371 GB.

The drive shows up in Windows Disk Management as signed and initialized and sized as 371 GB. I thought there might be a hidden partition or a shadow copy of some kind on the drive, but I found nothing. I ran the drive through the Diskpart command's "Clean" process with no change in the free space available. I do have Windows system protection ON, but only on my "C:|" drive and not on the HDD I am concerned about. The HDD did not show up in Systems Properties\System Protection. I purchased the HDD online as "used". I must be missing something, but I do not know what. Any help will be appreciated.

bfb


My System SpecsSystem Spec
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25 Jul 2013   #2
DocBrown

Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
 
 

Make & Model of HD ? Sata or IDE ?

a screen shot of Disk Management ?

Disk Management - Post a Screen Capture Image
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25 Jul 2013   #3
BigFatBoy

W8x64Pro
 
 
Hard Drive Problem - 500 GB Disk - only 371 GB un-allocated space ??

attached is the screen shot requested:

Hitachi Ultra Star AK2000 HUA722050CLA330
500GB
Sata II (3Gb/s)
7200 RPM
June 2011


Attached Thumbnails
Hard Drive Problem - 500 GB Disk - only 371 GB un-allocated space ??-diskmng.jpg  
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25 Jul 2013   #4
DocBrown

Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
 
 

I am thinking you may have to try some bootable HD software outside of the Windows operating system to ZERO the HD. Since you bought it used it may have been in some other system with a different kind of OS or format (like a Tivo box HD). Start by making a Partition Wizard bootable CD & boot up from that to see what details it gives for this HD.

Partition Wizard : Use the Bootable CD


Edit: Link for Hitachi Hard Drive utilities

https://www1.hgst.com/hdd/support/download.htm#DFT
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25 Jul 2013   #5
BigFatBoy

W8x64Pro
 
 
Reply

thanks. I'll give Partition Wizard Bootable CD.
My System SpecsSystem Spec
25 Jul 2013   #6
DocBrown

Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
 
 

Just remembered this one, also! It will ZERO the HD, also.

Darik's Boot and Nuke (DBAN) is free erasure software designed for consumer use.

Darik's Boot And Nuke | Hard Drive Disk Wipe and Data Clearing
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26 Jul 2013   #7
jumanji

Windows 7 Home Premium 32 bit
 
 

Hi BigFatBoy

The unique 372.49GB indicates that the HDD was used on a Mcintosh. (The rest of the drive constitute a Host Protected Area created by the computer manufacturer. I am not going to deliberate on this further.)

OK, to that extent DocBrown was right.

But................Conventional partitioning/formatting tools will not see the HPA, just like Windows didn't. So forget about it.

Even DBAN can't touch it.

There are advanced tools to reclaim the Host Protected Area and by the very nature difficult to understand and use by normal users.

So here is an easy tool you may try first.

Download and install the HDD Capacity Restore Tool from HDDGURU: HDD Capacity Restore Tool ( Works only with 32bits Windows )


Run it. Make sure the correct drive you want to reclaim is shown. Click on " Restore Capacity"

Hard Drive Problem - 500 GB Disk - only 371 GB un-allocated space ??-hddcrttool.jpg

Screenshot: Courtesy - hddguru.com ( I don't have a HPAed drive to try. )

Please do report the results. If it does not work I can point to other tools.


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27 Jul 2013   #8
BigFatBoy

W8x64Pro
 
 

thank you for the feedback. the following are the suggestions I have used with results:
-> Partition Wizard via bootable CD: wipe the HDD and filled each sector with zeros. - No change is HDD capacity
-> HDD Capacity Restore Tool: website states software *only works on W32bit; *my install is Wx64 bit, not-used.
-> Darik's Boot and Nuke: *not used as yet.
I note that Darik's software claims to use same procedures as Partition Wizard bootable CD
Should I try it anyway??
thank you.

ps 7.27.13
I downloaded and ran HDD Guru's "HDD Low Level Format Tool" based on following statement in the Atola Technology Blog July 19, 2007 "Restoring Factory Hard Disk Capacity". The entire article is a complete guide on recovering hard drive factory capacity.

"sometimes a damaged Master Boot Record may cause the BIOS and/or the Operating System to misdetect the true hard drive capacity. In this case you would need to use a zero-fill tool."

Results unchanged after applying low level format...
My System SpecsSystem Spec
27 Jul 2013   #9
jumanji

Windows 7 Home Premium 32 bit
 
 

Quote   Quote: Originally Posted by BigFatBoy View Post
thank you for the feedback. the following are the suggestions I have used with results:
-> Partition Wizard via bootable CD: wipe the HDD and filled each sector with zeros. - No change is HDD capacity
-> HDD Capacity Restore Tool: website states software *only works on W32bit; *my install is Wx64 bit, not-used.
-> Darik's Boot and Nuke: *not used as yet.
I note that Darik's software claims to use same procedures as Partition Wizard bootable CD
Should I try it anyway??
thank you.
As I told you in my previous post conventional Partition/formatting tools as well as DBAN will not touch the Host Protected Area and you will draw a blank. Try as much as you can. ( Do your own research on reclaiming Host Protected Area)

It should still be easier to hook up your HDD as a second internal drive on a 32bit Windows and try the Capacity Restore Tool. ( the no-sweat method)

OK, if you can't or do not want to do it on another PC and would like to do it on your PC only, then - as promised in my previous post - I would suggest HDAT2.

HDAT2/CBL Hard Disk Repair Utility ( It can be tried in Demo mode on Windows. If it shows the HPA area, you have to boot in DOS and run. No execute command will work on Windows. Will work on DOS only)

Explanation of Host Protected Area:
http://en.wikipedia.org/wiki/Host_protected_area

HDD Capacity Restore Tool:
http://hddguru.com/software/2007.07.20-HDD-Capacity-Res...

HDAT2/CBL Repair Utility:
http://www.hdat2.com
http://www.hdat2.com/hdat2_faq.html
http://www.hdat2.com/files/cookbook_v11.pdf

Good luck. I have blown my conch
My System SpecsSystem Spec
27 Jul 2013   #10
BigFatBoy

W8x64Pro
 
 

To: DocBrown and jumanji Please see the PS in my earlier post dated 7.27.2013.

I am assuming that the Low Level Format Tool from HDD Guru was needed based on the article about using the HD Capacity Recovery Tool. The article on the HD Recovery Tool indicated a low level format and filling with zeros was needed to erase the MBR. I do not know if using the low level formatting tool removed the Host Protected Area. However, after low level formatting, the drive capacity remains unchanged.

Again, using the HD Recovery Capacity tool requires W32. Since I do not have a 32 bit Windows machine of my own or someone else's to work with, I will have to abandon that option for now.

I will use the information on the HPA provided above and see what I can come up with.... You seem to indicate that HDAT2 might show the HPA area, and if so, I would have to boot in Dos and run HDAT2 from there; no problem. If I can not discern an HPA using HDAT2 then I can keep looking OR find a W32 PC.

Which leads me to ask; IF the HD Capacity Recovery software runs only on W32, could I not devise a way to run the HD-C Recovery SW on the hard drive from Dos or from a Linux boot device using my current x64 PC???
thank you
bfb
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 Hard Drive Problem - 500 GB Disk - only 371 GB un-allocated space ??




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