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Only able to see 2TB of my 3TB HDD

post #1 of 3
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Hey all,

First of all I know about converting HDDs to GTP etc, but this is a little different I think.

I have 2 HDDs, both are 3TB.

Both are only showing 2TB with 790gb unallocated space. Now, I can only convert the HDD that DOESN'T have windows installed on it, so I can enable the 3TB for that, but I can not do it with the one that already has windows on it.

Im using a B85M-ITX board, I've used the Asrock 3TB unlocker but I still can not get this HDD to see the full 3TB.


Any ideas?
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My System
(15 items)
 
  
CPUMotherboardGraphicsGraphics
Intel I7 3770K @ 5ghz 1.320v ASRock Z77 Fatal1ty  Evga Titan X 12gb Evga Titan X 12gb 
RAMHard DriveHard DriveCooling
G.Skill 16gb DDR3 @ 2400mhz Intel 520 120gb SSD (boot drive) Western Digital 3TB Alphacool 560mm Rad - custom loop 
OSMonitorKeyboardPower
Microsoft 7 Home Premium 64bit Dell U3011 2560x1600 Logitech G19 Corsair AX1200i 
CaseMouseMouse Pad
Lian Li PC-Z70 Logitech G9 Razor Destruction 
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post #2 of 3
MBR disk partitions are limited to 2TB in size. Non-UEFI installations must use a MBR partition table to install the Windows boot loader, and therefore only 2TB is usable.

The ONLY way to use a boot volume greater than 2TB would be to boot off of a UEFI enabled Windows 7 or Windows 8 install DVD, and format the primary disk with a GPT partition table during the installation process. You should be able to use the whole 3TB as a single volume (or split up, if you choose) that way.

I thought I'd add this little tidbit - since not everybody knows. All Windows 8 install DVD's are UEFI compliant, but you must use a Windows 7 SP1 disc to do a UEFI installation. RTM Windows 7 non-SP1 install disc doesn't support UEFI installation. When you do your installation on that ASRock board and boot off the DVD to do the install, make sure you pick the UEFI DVD drive listed and not the non-UEFI one. The startup device you pick determines which boot loader is executed off the install DVD.

Greg
Edited by hammong - 8/20/13 at 8:38am
post #3 of 3
The disk needs to be in GPT format. Your drive is currently in MBR.

Taken right out of Sean's guide:
Type Diskpart, press Enter.
Type List Disk , press Enter.
Type Select Disk # (where # is the number your drive shows up as), press Enter.
Type Clean, press Enter.
Type Convert GPT, press Enter.
Type Exit, press Enter.

Use that to convert your drive to GPT, then format it. IF there is any data on the drive(s) it will be lost in the GPT conversion process.

You cannot get more than 2TB on the drive that has windows on it. Windows has to be wiped, drive wiped, converted to GPT, windows reinstalled, and data put back. HOWEVER, as the above poster has stated, you cannot install windows onto a GPT drive if your board does not have UEFI/EFI bios.
Edited by Lord Xeb - 8/20/13 at 8:00pm
 
Gsvlip Dudyrm
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Oda'maksv
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Gsvlip Dudyrm
(15 items)
 
Oda'maksv
(9 items)
 
CPUMotherboardGraphicsRAM
3770k @ 4.5 1.312 load z77 Sabertooth GTX 1070 Gaming 2126/2249 w/ Hybrid cooler Patriot Viper Xtreme D2 1600  
Hard DriveHard DriveHard DriveOptical Drive
Samsung 850 Pro 1TB 4TB RAID 0 4.5TB RAID 0 <.< DVD drive 
CoolingCoolingOSMonitor
H105 EVGA Hybrid GPU cooler Windows 10 Asus MG279Q - 24" 144Hz 1080p 
KeyboardPowerCaseMouse
Filco Majestic II w/ Cherry Reds Seasonic X 760W CM690 II Adv. Logitech G400 
Mouse PadAudioAudioAudio
Razer Goliath AKG A701 JDS Labs Objective 2 JDS Labs ODAC 
CPUMotherboardGraphicsRAM
Core i5 750 3.99 (190x21) 1.376v Load ASUS P7P55d-E Pro GTX 670 FTW <- Poor overclocker :( 8GB (4x2GB) G.Skill DDR3 1600 
Hard DriveHard DriveOptical DriveOS
Samsung 830 Evo 128GB 2x 2TB  Some DVD drive OSX 10.10.4 
MonitorPowerCaseMouse
Asus 1080P Crap TX 750 HAF 922 G400s 
Mouse PadOther
Apple Keyboard Xbox One controler 
CPURAMHard DriveHard Drive
C2D 2,26GHz under volted @ .978v 8GB  Crucial M4 64GB SSD 500GB Scorpio Black 
OSMonitorKeyboardMouse
OS X 10.0 1280x800 Built-in Trackpad 
Audio
Built-in 
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