Asrock B85M PRO3 mATX maximum size of hard drive
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=5502
Printed Date: 27 Jul 2025 at 1:09am Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Asrock B85M PRO3 mATX maximum size of hard drive
Posted By: sorenaachmann
Subject: Asrock B85M PRO3 mATX maximum size of hard drive
Date Posted: 03 Jul 2017 at 5:48pm
Hello,
I recently bought a motherboard, and found out the limit of a hard drive is 4TB, which is not enough for me, since I want to expand with 2x6TB.
I really need to know how many TB's the limit of one hard drive is on the Asrock B85M PRO3 mATX :)
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Replies:
Posted By: parsec
Date Posted: 03 Jul 2017 at 10:19pm
" rel="nofollow -
sorenaachmann wrote:
Hello,
I recently bought a motherboard, and found out the limit of a hard drive is 4TB, which is not enough for me, since I want to expand with 2x6TB.
I really need to know how many TB's the limit of one hard drive is on the Asrock B85M PRO3 mATX :)
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Where did you see (or think you saw) that the limit for the size of an HDD is 4TB? That is not correct.
IF there was a limit caused by the hardware on a board, and there is no such limit, that would be caused by the Intel SATA controller used in the board's B85 chipset, and ASRock could do nothing about that.
The only "limit" that exists for HDDs is caused by using 32 bit MBR partitioning of a drive whose capacity is equal to or greater than 2.2TB. But that is easily overcome by using GPT partitioning when a drive of 2.2TB or greater is initialized and formatted.
When a drive is partitioned in GPT, the limit of its capacity is 9.4 Zettabytes, or 9,444,732,965,739,290,427,392 bytes. No drives sold today even begin to approach that size. That is the size limit for a drive on your board, and any board that exists.
Using GPT partitioning (64 bit) is not new, and must be used for all high capacity HDDs, like 6TB drives.
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Posted By: sorenaachmann
Date Posted: 03 Jul 2017 at 11:21pm
" rel="nofollow - Hello again,
As I wrote, I bought a motherboard which is a MSI H81M-P33
This is what I think I saw:
BIOS VERSION 1.5 - Improved Intel Rapid Start Technology function. - Enhanced MSI M-Flash function. - Improved system resume function. - Improved 4TB HDD Compatibility. - Updated BIOS Code.
https://www.msi.com/Motherboard/support/H81M-P33.html
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Posted By: sorenaachmann
Date Posted: 04 Jul 2017 at 2:26am
Maybe my english is just bad... I thought they meant that 4TB was the "limit" now, and for example 3 was the limit before :) Nevermind I got it to work with diskpart :)
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