Solved

2TB Limit with Server 2008 R2 X64 Raid 5 Array

Posted on 2010-09-22
8
5,073 Views
Last Modified: 2012-05-10
Server Specs:
IBM x3620 M3 with 8x 2TB SAS drives with a ServeRAID M5015 SAS/SATA Controller.

Earlier this week I had configured a RAID 5 array using the LSI MegaRaid config wizard in the bios. I used all 8 drives in a  RAID 5 volume.

I then preceded to install Windows Server 2008 R2 x64 onto that array. When I booted into the Operating System - I shrunk the C:/ drive from 12.53 TB to 100 GB and then used the remaning space as a Backup Drive (V:). Everything was working fine.

Today i had a change of plans and decided to create 2 RAID 5 arrays (each with 4x2tb drives).

I then attempted to install Windows Server 2008 R2 x64 onto the first array. Once i entered into the OS i noticed that i only had access to 1.99 TB of data. The rest of my array was unusable and unavailable. I could not extend/expand the array - or create new volumes with it.

The send new 4x2tb array that i created was not the OS drive - and i was able to convert that to a dynamic/GPT disk so that all of the 5.5TB was usable.

MY QUESTION: Why am i now limited by the 2TB limit? I do not think that i did anything different with the setup this time. I am confused because earlier this week I had server 2008 R2 x 64 using the entire 12.5 TB array with (8x2TB) drives - now, using the same drives - just in different arrays - i am only able to access 2Tbs.

Any ideas?

Thanks!
0
Comment
Question by:RavenInd
  • 3
  • 3
8 Comments
 
LVL 32

Expert Comment

by:PowerEdgeTech
ID: 33740998
Server 2008, 2008R2, Vista, 7 cannot boot to a larger than ~2TB volume unless installed on UEFI-enabled system.
0
 
LVL 47

Accepted Solution

by:
dlethe earned 250 total points
ID: 33741094
The constraint was always there ... MSFT does not support bootable disk > 2.09TB unless you have an itanium-based system (or UEFI).  The difference is BOOTABLE.
0
 

Author Comment

by:RavenInd
ID: 33743733
How was it that i had it booted before than? I was booting to a 12.5 TB Drive on a 100GB partition... I do also remember there being a EFI System partion or something along those lines with the first install...
0
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

 
LVL 47

Expert Comment

by:dlethe
ID: 33744637
I object closing for zero. His question was asked, and answered by two experts correctly.  I will add that an array, volume, and partition are different things.  Booting to a 100GB partition is different then booting to a volume or disk.  To make it easier to understand, let me just say that windows won't let you boot to a C: drive that is > 2.09 TB. the 100GB partition is C:, so it worked. In light of the additional info, author clearly tried to make the 4x2GB array into a "C" drive.  This will not work.
0
 
LVL 32

Assisted Solution

by:PowerEdgeTech
PowerEdgeTech earned 250 total points
ID: 33744900
Agreed.  I thought that by pointing out the boot partition size limit, that it would be apparent to you why the first install worked and the second did not, because the with the first one, you created a 100GB partition, which is fine, and the second install only saw 1.99TB for the C partition, because that is all it can handle (non-EFI).
0
 
LVL 32

Expert Comment

by:PowerEdgeTech
ID: 33744986
I think splitting the points would have been more appropriate, but thank you for not simply closing the question.
0
 
LVL 47

Expert Comment

by:dlethe
ID: 33748419
thx everybody.
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I was supporting a handful of Windows 2008 (non-R2) 2 node clusters with shared quorum disks. Some had SQL 2008 installed and some were just a vendor application that we supported. For the purposes of this article it doesn’t really matter which so w…
The recent Microsoft changes on update philosophy for Windows pre-10 and their impact on existing WSUS implementations.
To efficiently enable the rotation of USB drives for backups, storage pools need to be created. This way no matter which USB drive is installed, the backups will successfully write without any administrative intervention. Multiple USB devices need t…
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…

947 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now