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RAID 5 - Using unallocated space


I recently purchase a Gigabyte GA-H97M-D3H motherboard that uses Intel chip sets including the ability to create different levels of RAID drives. In setting up my system I created a RAID 5 disk array using 4 Western Digital 2TB drives. Then I installed Windows 7 Professional as the OS. My problem is that it turns out that Windows does not seem to be able to address disks with sizes greater than 2 TB.

I need to figure out how, or if I can use unallocated space on a RAID5 drive created with your Intel Chipset. The Disk I created uses (4) 2TB drives to create a disk of 5589.04 GB. When I install the OS (Windows 7 Pro) it created a 100 MB System Reserved partition and a 2047.90 GB main partition. That left 3541.04 GB unallocated and I cannot figure out how to make use of that space.

I tried creating a 2TB virtual disk, but that was not allowed because supposedly there was not enough space. I tried extending the partition, but I got the following message:

"Only the first 2TB are usable on large MBR disks. Can not create partitions beyond the 2TB mark, not convert the disk to dynamic."

So how the hell do I make use of that space?

Other Information from the Intel Rapid Storage Technology untilty:

System Information

OS Name: Microsoft Windows 7 Professsinal

OS Version: 6.1.7601 Service Pack 1 7601

System Name: DEV_01

System Manufacturer: Gigabyte Technology co. Ltd.

System Model: H97M-D3H

Processor: GenuineIntel Intel64 Family 6 Model 60 Stepping 3 3.401 GHz

BIOS: American Megatrends Inc. F4

Intel Rapid Storage Technology

Kit installed:

User Interface version:

Language: English (United States)

RAID option ROM version:

Driver version:

ISDI version:

Hardware Information

RAID Configuration

Array Name: SATA_Array_0000

Size: 7,630,915 MB

Available Space: 7 MB

Number of volumes: 1

Volume member: Local1

Number of array disks: 4

Array disk: WD-WCC4MNKXY98X

Array disk: WD-WCC4MLJE75X5

Array disk: WD-WCC4MLNSJ6XS

Array disk: WD-WCC4MLVN1NY7

Disk data cache: Enabled

Volume name: Local1

Status: Normal

Type: RAID 5

Size: 5,723180 MB

System Volume: Yes

Data stripe size: 64KB

Write-back cache: Off

Initialized: Yes

Parity errors: 90

Blocks with media errors: 0

Physical sector size: 4096 Bytes

Logical sector size: 512 Bytes

... There is more, but I think that this should be enough to work with.

Can anybody tell me how to access that unallocated space without having to reconfigure my drives?.

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1 Reply

This problem is very common when UEFI is not enabled at the BIOS. Please try enabling this at the BIOS level and let me know how it goes.

Kevin M