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Windows 7: Trying to reformat Samsung 850 1TB Windows 7 64 as UEFI/GPT

23 Aug 2016   #1
GlassDeviant

Windows 7 RC 32 and 64, Windows Vista 32 and 64, XP Pro 32, Windows 2000 Pro, Ubuntu, RHEL, etc.
 
 
Trying to reformat Samsung 850 1TB Windows 7 64 as UEFI/GPT

Every now and again I do a complete clean install of everything from my router firmware to my PC. I have never "reinstalled" on the SSD before though and it's been quite some time so I forget whatever I did when I first clean-installed it.

I was using this process:

Boot Windows 7 Update install disk (I upgraded from a Vista OEM disk ages ago).
Shift+F10 and run diskpart.
select disk 0
clean all
create partition primary align=1024
format fs=ntfs
assign
active
exit
exit

When I rebooted the installer would not let me proceed because the disk (I assume it meant BIOS) was set to EFI and it wanted a GPT partition. So I went back to diskpart and converted the disk to GPT and remade then reformatted the partition. The partition again could not be used because...it was GPT.

So I had to go into the BIOS and make it non-EFI (CSM/Legacy), which I did not want to do. Windows 7 is working "ok" now but how do I install from a pre-SP1 Windows 7 disk with UEFI enabled and using GPT partitions? Or can I just turn on UEFI and not worry about going to GPT?


My System SpecsSystem Spec
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23 Aug 2016   #2
samuria

win 8 32 bit
 
 

You don't create partitions clean the drive boot Windows and let it create partitions and format
My System SpecsSystem Spec
23 Aug 2016   #3
ThrashZone

Win-7-Pro64bit 7-H-Prem-64bit
 
 

Hi,
OS Type for win-7 should be set at Other OS not uefi in bios
Win-7 was never intended for a uefi install but you can if you insist
UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with

Personally I would only have C and no system reserved partitions,
A folders structure is a lot better than a bunch of partitions that are never larger enough....
My System SpecsSystem Spec
.

23 Aug 2016   #4
Megahertz07

Windows 7 HP
 
 

This is what I did to install Win 7 as UEFI / GPT
On BIOS:
- SATA=RAID or AHCI
- OS=Other
- Storage Boot and PCI device to UEFI only

- Boot your Win 7 installation on UEFI mode, go to install, custom, advanced, delete all partitions, create a new one (Win will create 3 partitions) and proceed.
My System SpecsSystem Spec
23 Aug 2016   #5
GlassDeviant

Windows 7 RC 32 and 64, Windows Vista 32 and 64, XP Pro 32, Windows 2000 Pro, Ubuntu, RHEL, etc.
 
 

I want to avoid the extra partitions, this is just wasted space. My previous install was one single partition, I just can't remember what the instructions I followed were to get it that way.
My System SpecsSystem Spec
23 Aug 2016   #6
Megahertz07

Windows 7 HP
 
 

The 3 partitions created are the minimal.
- First is a 100M UEFI FAT 32 partition
- Second is a 120M raw MS reserved partition
- Third is the remaining space NTFS partition (drive C
My System SpecsSystem Spec
23 Aug 2016   #7
ThrashZone

Win-7-Pro64bit 7-H-Prem-64bit
 
 

Hi,
mbr disk supports up to 4 partitions
There's no need to go gtp on a 1tb disk above 2tb is when you pretty much have to so windows sees the entire disk.
My System SpecsSystem Spec
24 Aug 2016   #8
GlassDeviant

Windows 7 RC 32 and 64, Windows Vista 32 and 64, XP Pro 32, Windows 2000 Pro, Ubuntu, RHEL, etc.
 
 

Guess I will stick with what I have then.
My System SpecsSystem Spec
24 Aug 2016   #9
ThrashZone

Win-7-Pro64bit 7-H-Prem-64bit
 
 

Hi,
What is that ?
Post a screen shot of disk management.
My System SpecsSystem Spec
24 Aug 2016   #10
Brds7t7

Windows 7 Pro 64-Bit, Windows 7 Ultimate 64-Bit, Windows 8.1 Pro 64-Bit
 
 

Quote   Quote: Originally Posted by GlassDeviant View Post
Guess I will stick with what I have then.
With regards to UEFI/Secure Boot, as ThrashZone says, it isn't needed on Windows 7. It's designed for Windows 8 and above. Stick with Legacy BIOS for 7.

Also, if your disk is below 2TB then I would stick to MBR. You can convert a 2nd disk (e.g. Storage disk) that's above 2TB to GPT within Windows even when using Legacy BIOS. But, I would leave the boot disk as it is.

I have Samsung 850 EVO 250GB as boot drives in all my systems and I don't set any of them to GPT.
My System SpecsSystem Spec
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 Trying to reformat Samsung 850 1TB Windows 7 64 as UEFI/GPT




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