Windows can only see disks larger than 2TB IF it is a GPT disk, HOWEVER ... Windows cannot BOOT to a GPT disk, UNLESS ... you install a 64-bit version onto a GPT disk on a UEFI-enabled system. The catch?  The PowerEdge 2950 does NOT support UEFI. The workaround?  You can do one of two things: 1. Create two 2TB RAID 1's.  Both RAID 1's will be small enough for Windows to work with without any problems. 2. Create two Virtual Disks (arrays) across your four disks - VD0 will be 100GB, and VD1 will use the remaining space.  You will do this in the CTRL-R utility during POST.  First, delete the existing VD.  Second, configure a new VD; specify the size as 100GB, checking the Advanced and Initialize boxes.  After creating your 100GB RAID 5 (VD0), then install Windows to that.  After Windows is installed, then create a second RAID 5 VD (can be done from OMSA in Windows).  Once you have configured and initialized this VD, then convert that disk (Windows will see each VD as a separate "disk") to GPT.
Hi, I have one Dell PE2950 Server, I installed Windows Server 2008 Standard with SP2 Upgrade the BIOS, Raid Firmware PERC-6/i, ESM Firmware, NIC Firmware Install Server Administrator 7.0 I have four 2TB HDDs with Raid-5, made C:\100-GB & remaining for backup I am able to create just one partition 2TB and remaining not able to use Even I tried to convert Basic Disk to GPT Disk this option is also not working as mention below pic [IMAGE] Now I am looking forward for your response may be you have some solution for this problem I want to use this server for ERP Backup so I need big Partition for full & daily backup so plzzzzzzzzzz......... I installed windows 2 time but result is same. With Best Regards & Thanks Asim
Basic Disk Convert to GPT Disk not active