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Unable to create a partition on RAID 5 (PowerEdge R720)
Hi
We have PowerEdge R720 Server on which RAID 5 is configured (4 Hard Drives of 1TB each). Disk Management is showing 2 Partitions (System Partition, and C Partition) and 2 Unallocated Portions (1948GB and 745 GB). The problem is that Disk Management Utility is not allowing to create New Volume on Unallocated Portion having capacity 745 GB.
Integrated Raid Controller is Dell PERC H710 Mini
theflash1932
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April 13th, 2017 11:00
Windows can't support a "disk" larger than 2TB unless it is GPT.
Windows can't boot a GPT "disk" unless it is installed in UEFI mode.
Each RAID array is presented to Windows as a separate "disk".
You need to do one of three things:
1. Change boot mode from BIOS to UEFI, then reinstall Windows.
2. Keep BIOS setting and configure two 1TB RAID 1 arrays.
3. Add additional disks small enough to install the OS, then convert your 4-disk 3TB RAID 5 to GPT to use the entire capacity for data.
I would recommend you configure a RAID 6 instead of RAID 5.
khuram782shahza
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April 13th, 2017 12:00
Thanks Dear, Problem solved by converting disk to GPT and by changing boot mode from BIOS to UEFI.