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Windows 7: 3TB Seagate capacity reduced to 750GB after failed Win 7 install

14 Nov 2012   #1
derek2809

Windows 7 Ultimate x64
 
 
3TB Seagate capacity reduced to 750GB after failed Win 7 install

Hello

I tried installing 64bit Win 7 Ultimate on mirrored 3TB Seagate HDD using a Digitus RAID card and failed. After the failed attempt, I disconnected the HDD and plugged the primary HDD to an on-board SATA connector only to find its capacity reduced to 750 GB. Windows Preinstallation Environment shows the same size and running clean produced no effect.

Something odd I noticed after running diskpart is that no matter how many drive is connected to onboard SATA, it only shows the 750 GB and the PC name is MINWINPC.

I`m completely stuck with this and cannot figure any solution. Please anyone help me restore the original 3TB size.

Looking forward to replies.


My System SpecsSystem Spec
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15 Nov 2012   #2
bobafetthotmail

Win 7 Pro 64-bit 7601
 
 

Could you please have a look at it from disk management and post a screenshot?

Start - Control Panel - Administrative Tools - Computer Management - Disk Management. (or write "disk management" in the Start searchbox)

how to post screenshots in this forum
My System SpecsSystem Spec
15 Nov 2012   #3
derek2809

Windows 7 Ultimate x64
 
 

Thanks for the reply. Disk Management displayed the free space as Unkown Space with the correct capacity, so I zero-filled the hard drives and the drive capacity showed up correctly in the Windows 7 setup menu.

Regards,

D
My System SpecsSystem Spec
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15 Nov 2012   #4
derek2809

Windows 7 Ultimate x64
 
 

The free version of Active KillDisk did the job on this occasion.
My System SpecsSystem Spec
16 Nov 2012   #5
bobafetthotmail

Win 7 Pro 64-bit 7601
 
 

yeah, was suspecting that it did something weird with partitions. Theoretically, any decent third-party partition tool could have done the trick as well without fully erasing the disk.
Good to know that i's ok now.
My System SpecsSystem Spec
16 Nov 2012   #6
derek2809

Windows 7 Ultimate x64
 
 

Something odd has happened. Because I couldn`t build a RAID array using Intel Rapid Storage Technology after successfully installing Windows on a single HDD, I enabled RAID in the up-to-date BIOS and tried reinstalling Windows 7 on the RAID but failed. So I quick-formatted the HDD and used the MiniTool home edition to repartition it and found one partition with a capacity of about 2.7 TB to install Windows 7 on but the installation stopped just as it was attempting to configure Windows at the last stage.

I`m not sure if there is an issue with installing Windows 7 on a RAID array. Has someone succeeded in installing Windows 7 on a RAID array using an Intel Desktop Board?
My System SpecsSystem Spec
17 Nov 2012   #7
derek2809

Windows 7 Ultimate x64
 
 

Myth busted. The trick was to install the Intel Raid Driver F6 upon initiating the Windows install by choosing Driver in Windows Setup. Windows 7 Set Up does not load the driver for the Intel Desktop Board even after you have specified RAID in BIOS and created a RAID array.
My System SpecsSystem Spec
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 3TB Seagate capacity reduced to 750GB after failed Win 7 install




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