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Windows 7: 3 TB drive -- W7 32 bit can only access 2.1 TB

03 Jul 2010   #1
jimbo45

Linux CENTOS 7 / various Windows OS'es and servers
 
 
3 TB drive -- W7 32 bit can only access 2.1 TB

Hi there
With the new 3 TB drives appearing (it wasn't that long ago that a mere 20 MB drive was seen as HUGE storage capacity) note that if you are running the 32 bit version of windows you'll have a 2.1 TB size limitation on the hard disk without some sort of special software.

64 Bit versions are OK.

Cheers

jimbo


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03 Jul 2010   #2
WindowsStar

Windows 7 Enterprise (x64); Windows Server 2008 R2 (x64)
 
 

Yep, I remember this and it is true.
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03 Jul 2010   #3
logicearth

Windows 10 Pro (x64)
 
 

The limitation is with the Master Boot Record. To go over 2 TB you need to use GUID Partition Table, which Windows 7 supports. Without an EFI board (Alternative to a BIOS) you cannot boot from a GPT disk. However, it will work for storage drives.

Master boot record - Wikipedia, the free encyclopedia
Quote:
Both the partition length and partition start address are stored as 32-bit quantities. Because the sector size is 29 or 512 bytes, this implies that neither the maximum size of a partition nor the maximum start address (both in bytes) can exceed 232 × 29 = 241 bytes, or 2 × 240 = 2 TiB. Alleviating this capacity limitation is one of the prime motivations for the development of the GUID partition table (GPT).
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03 Jul 2010   #4
Reilly

Windows 7 Ultimate 64bit
 
 

Due to limitations
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03 Jul 2010   #5
pallesenw

Windows
 
 

And note that 32bit Win7 also supports GPT
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03 Jul 2010   #6
mickey megabyte

ultimate 64 sp1
 
 

Quote   Quote: Originally Posted by jimbo45 View Post
...(it wasn't that long ago that a mere 20 MB drive was seen as HUGE storage capacity)...
those were the days...


Attached Images
3 TB drive -- W7 32 bit can only access 2.1 TB-harddrivepp5zx8tw6.jpg 
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03 Jul 2010   #7
JonM33

Windows 7 Home Premium x64
 
 

Quote   Quote: Originally Posted by jimbo45 View Post
Hi there
With the new 3 TB drives appearing (it wasn't that long ago that a mere 20 MB drive was seen as HUGE storage capacity) note that if you are running the 32 bit version of windows you'll have a 2.1 TB size limitation on the hard disk without some sort of special software.

64 Bit versions are OK.

Cheers

jimbo
It's a Seagate and should be avoided anyway.

Note that it's not a 32-bit limitation but a 32-bit Windows limitation. 32-bit Linux will be able to use it without a problem.
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03 Jul 2010   #8
kegobeer

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by pallesenw View Post
And note that 32bit Win7 also supports GPT
That's not correct. Only Windows 64 bit operating systems work with GPT. I've tried using GPT on Windows 7 Ultimate x86 and it did not work.
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03 Jul 2010   #9
logicearth

Windows 10 Pro (x64)
 
 

Quote   Quote: Originally Posted by kegobeer View Post
Quote   Quote: Originally Posted by pallesenw View Post
And note that 32bit Win7 also supports GPT
That's not correct. Only Windows 64 bit operating systems work with GPT. I've tried using GPT on Windows 7 Ultimate x86 and it did not work.
No, Windows 7 regardless if it is x86 or x64 supports GPT discs. You just cannot use a GPT disk as a bootable drive on an x86 platform. You need an EFI Motherboard and Windows 7 x64 to boot a GPT disk. I used GPT on my external harddive not to long ago. Of course I had to revert to MBR because Windows XP does not support GPT.
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03 Jul 2010   #10
kegobeer

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by logicearth View Post
Quote   Quote: Originally Posted by kegobeer View Post
Quote   Quote: Originally Posted by pallesenw View Post
And note that 32bit Win7 also supports GPT
That's not correct. Only Windows 64 bit operating systems work with GPT. I've tried using GPT on Windows 7 Ultimate x86 and it did not work.
No, Windows 7 regardless if it is x86 or x64 supports GPT discs. You just cannot use a GPT disk as a bootable drive on an x86 platform. You need an EFI Motherboard and Windows 7 x64 to boot a GPT disk. I used GPT on my external harddive not to long ago. Of course I had to revert to MBR because Windows XP does not support GPT.
Ahh, yes. Thanks for correcting me.
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 3 TB drive -- W7 32 bit can only access 2.1 TB




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