cannot allocate partition

gops · Oct 8, 2013

hi guys

so im not an IT expert, but I managed to partition my 3tb external hard drive into 2tb and the remainder. the 2tb shows up on the pc but the other partition does not. ive used windows 7 computer management to do the partition. when I right click the partition that I cannot see, don't get the option to allocate it

thanks

lonewolf7 · Oct 8, 2013

What did you use to partition the HDD NTFS or GPT ? HDD's larger than 2.2TB needs to be formatted by GPT, NTFS wont work here.

And try to format the HDD and repartition the HDD with a bootable media(DVD/USB).

gops · Oct 9, 2013

i used NTFS. I don't know what on earth GT is. how do you format using GPT? essentially, ive got a 3 TB HDD and want to split it up into 2TB and 1TB. im using windows 7 and the HDD does not pick up when I try to use a boot disk.

Hawkeye22 · Oct 9, 2013

NTFS is the file system (format). GPT is the partition type. Volumes over 2.2TB need to use GPT. I beleive only windows 7 x64 and higher can boot off a GPT partition and that requires a UEFI motherboard.

Q. Can Windows 7, Windows Vista, and Windows Server 2008 read, write, and boot from GPT disks?

A. Yes, all versions can use GPT partitioned disks for data. Booting is only supported for 64-bit editions on UEFI-based systems.

http://msdn.microsoft.com/en-us/library/windows/hardware/gg463525.aspx#X-201104111922342

lonewolf7 · Oct 9, 2013

First make sure you have UEFI option in BIOS. If yes then enable it, if its disable by default. Then format the HDD with GPT and install WIN 7 64 bit to boot from the drive.

here is a page that might help you : http://www.sevenforums.com/installation-setup/223882-can-t-install-3tb-hdd.html

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