Hard drive not seen as full size

Posted on 2013-11-08
Medium Priority
Last Modified: 2016-11-23
I am trying to add a Seagate 4TB hard drive to a Dell Precision 380 desktop running XP Pro. The BIOS reconizes it as a 4TB drive but Windows Disk management sees it as 1.6TB. I want this a 2nd drive just for data
Question by:nestey
LVL 17

Expert Comment

ID: 39634683
You have probably formatted in NTFS which would require creating partitions with a third party App.
You need to review GPT at:

Expert Comment

ID: 39634696
You may have to run windows updates as windows xp cannot by default read disks over 1TB unless you install the patches from windows updates.
LVL 15

Expert Comment

ID: 39634711
This answered EE question may have some bearing on the problem:


Older hardware and OSes struggle with the much newer Advanced Format drives of more than 2.2TB, as such drives use larger sector sizes to stay inside the 2^32 sector count limit imposed by the MBR in systems such as yours.
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LVL 88

Accepted Solution

rindi earned 750 total points
ID: 39634735
If your XP is the normal 32 bit version, it won't support a GPT disk, so you will have to use the disk as an MBR disk where you are limited to 2TB max size, which comes down to the 1.6 TB size which you see now.

If you are using XP 64 bit, then you can convert the disk to a GPT disk within diskmanagement and after that you will have it's full size available. But be aware the the conversion is destructive, so any data you already have on the disk will be lost.

Anyway, as Windows XP is obsolete anyway I think it is rather odd you are adding a bigger disk to the system. Remember support for that OS will cease next June, after that no updates and a system that will get easier to attack daily. You should upgrade to Windows 7 asap., which by the way can use GPT disks even in it's 32bit version (it just can't boot from that disk, but as data disk it would be fine).
LVL 36

Expert Comment

by:Seth Simmons
ID: 39634838
a system that old i can't see how the drive can even function properly - you'll hit hardware limitations before you get to anything in the operating system

spec sheet states 2tb maximum storage


Author Closing Comment

ID: 39634889
Thanks all looks like I will upgrade this machine to Win 7

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