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.