Windows 10: 3TB disk showing as 2TB
3TB disk showing as 1TB
Hi, I've just installed a 3TB Toshiba hdwd130 and it's only showing as 1TB?
I've used 2TB disks before, but this is the first 3TB disk I've tried to use.
The disk controller on the MB is an RS880P.
I've checked and the drivers all appear to be the latest. Any ideas please?
Last edited by winchesterstoke; 16 Feb 2016 at 07:26.
For disk > 2TB. You must initialize it as GPT disk.
Many thanks. I've converted it to a GPT disk but it's still showing as 1TB?
There might be an unallocated space that Windows 10 did not recognized.
You can try various tool to maximize the volume and convert it into GPT e.g. Windows DiskPart:
- Win+X, choose Command Prompt (Admin)
- diskpart - to initialize DiskPart
- list disk - to see all the connected hard drives
- select disk # - replace the # with the 3TB disk we are focusing at e.g. select disk 3
- clean - this will delete all partitions or volumes on the selected disk including the hidden etc.
- convert gpt - convert to GPT
Other tool like GParted also good to try. Burn it into CD or USB, boot the disk tool, select the 3TB disk and see if GParted recognize the whole volume. If it does, just use the Grow/Shrink options to expand the whole 3TB.
MiniTool Partition Wizard is another excellent free utility that installs right in Windows so no need to burn a disk to boot from:
Best Free Partition Manager for Windows | MiniTool Partition Free
You can also use just plain old disk management built into Windows - but that has the limitation of only moving/expanding partitions to the right on a disk - it won't handle anything if you want to move/expand partitions to the left. Also, MiniTool will show you partitions/hidden spaces that Windows disk management won't.
Many thanks to all of you....
This is very strange...
I've used diskpart from the command prompt and that tell me it a 1TB disk...
So I've tried Partition Manager - thanks for the recommendation NavyLCDR - and that also indicates it's a 1 TB disk.
Looking at some videos on Youtube they all show that when something like this happens that you can see the unallocated space - but need to do things to allocate it. I just see a 1TB disk with no additional unallocated space?
I even gone so far as checking that disk does say 3TB - it does, and I bought it directly from Amazon - so it should be legitimate.
Ahhhh - I just want my extra disk space!
Are you trying to use this as a BOOT disk. If you are then you will need to change the BIOS to boot in into UEFI mode. If you have an old BIOS machine (no UEFI) then you'll have to add another Non GPT drive --say a 110 / 250 GB SSD for booting -- these are very cheap these days. (MBR HDD's have a Max partition size of 2TB I think).
If your BIOS allows boot into UEFI mode then it's simple - convert the HDD to GPT and then restore your data.
Otherwise you are going to be limited to around 2 TB on your HDD with a lot wasted.
The trouble with a lot of You Tube videos is that they just show you what to do when stuff works --I'm of the Old School --give me a decent Manual any day rather than Videos. Then I can read at my leisure and look at all sorts of scenarios of what to do when it DOESN'T work !!!!.
I really dread it when I want to get some info and it's all on You Tube --sometimes the old fashioned way still works best. !!!
Thanks jimbo - no, not trying to use this disk as a boot disk (have a hybrid drive for that). I thought it could be the 2TB limit - but I'm only seeing 1TB on the disk at the moment (sorry, the thread title is wrong )?
I'm sure I've used 2TB disks in it before without problems.
start up windows.
CMD mode in admin mode
SELECT DISK nn where nn is your 3 TB HDD.
Now use control panel -->administrative tools - storage manager
You should see your HDD as a RAW HDD - create your partition
2TB HDD's are OK for MBR. 3TB and larger HDD's need GPT to use whole HDD.
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