Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK

#1 | Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sat Jan 31, 2015 8:01 am (Last edited: Sat Jan 31, 2015 8:06 am)

Hi folks,

I have an Asus P8Z77-V LK and I am trying to setup a RAID 1 array with 2x WD Red 3TB drives. I switched the SATA mode from AHCI to RAID in the bios successfully. I hit Ctrl+I to enter the Intel RST Option ROM v11.0.0.1339 and setup the RAID 1 array. The correct RAID size of 2.7 TB is shown in the Intel RST Option ROM, however, once I get into Win8 - under disk management - the drives show ~746 GB each and are not RAIDed together.

Does anyone know how to fix this problem?

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#2 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sat Jan 31, 2015 11:29 am

Zitat von terralysis im Beitrag #1
The correct RAID size of 2.7 TB is shown in the Intel RST Option ROM, however, once I get into Win8 - under disk management - the drives show ~746 GB each and are not RAIDed together.

What do you see, when you run the Windows Explorer and right click onto the related drive and choose the "Properties" option?

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MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
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#3 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sat Jan 31, 2015 5:57 pm

In disk management, both drives are currently unallocated space so they don't show up in windows explorer.

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#4 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sat Jan 31, 2015 6:23 pm

Zitat von terralysis im Beitrag #3
In disk management, both drives are currently unallocated space so they don't show up in windows explorer.

This means, that you have just created the RAID1 array, but nothing else (no partitioning, no formatting of the partitions, no dedication of drive letters).
Question: Which boot system (LEGACY or UEFI) did you use, when you installed the OS?

My current System:
MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
Donation Link:
If you are satisfied with my Forum activities, you can send a donation to my personal PayPal account by clicking onto >this< link.

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#5 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sat Jan 31, 2015 9:14 pm

it's a UEFI bios - I used the advanced mode so I'd have access to more options.

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#6 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sat Jan 31, 2015 10:40 pm

Zitat von terralysis im Beitrag #5
it's a UEFI bios - I used the advanced mode so I'd have access to more options.

This was not my question. I asked, if you installed the OS in UEFI mode (creating a GUID Partition Table) or in LEGACY mode (using the Master Boot Record).

My current System:
MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
Donation Link:
If you are satisfied with my Forum activities, you can send a donation to my personal PayPal account by clicking onto >this< link.

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#7 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sat Jan 31, 2015 11:57 pm

Sorry, misunderstood your question - The OS was installed on a 120gb SSD through the Win 8 setup, so I assume it was created using MBR.

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#8 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sun Feb 01, 2015 12:15 am

Zitat von terralysis im Beitrag #7
The OS was installed on a 120gb SSD through the Win 8 setup, so I assume it was created using MBR.

Only the GUID Partition Table supports >2 TB sized drives. So you should convert the Partition Table from MBR to the GPT.

My current System:
MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
Donation Link:
If you are satisfied with my Forum activities, you can send a donation to my personal PayPal account by clicking onto >this< link.

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#9 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sun Feb 01, 2015 12:44 am (Last edited: Sun Feb 01, 2015 12:47 am)

Thanks for your help so far. How do I do that?

On a side note: My older computer also has Win8 installed on a 120gb SSD and a 2x 4TB WD Red RAID 1 array. The OS was installed the same way (so I assume MBR, anyway to confirm this?) and the size of the 4TB drives is read correctly.

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#10 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sun Feb 01, 2015 1:09 am

Zitat von terralysis im Beitrag #9
How do I do that?

Look >here< or >here<.
Since your questions have nothing to do with the topics of this Forum, you should better ask them somewhere else.

My current System:
MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
Donation Link:
If you are satisfied with my Forum activities, you can send a donation to my personal PayPal account by clicking onto >this< link.

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#11 | RE: Windows 8 x64 doesn't show correct RAID size with Asus P8Z77-V LK datum

Sun Feb 01, 2015 2:08 am (Last edited: Sun Feb 01, 2015 3:06 am)

The 2 drives are already GPT disks. Following the instructions shown in your first link, the only options available to me are 'Convert to Dynamic Disk' and 'Convert to MBR disk'.

Any ideas? Would this not pertain to the RST drivers?

Edit: I managed to fix it. I downloaded the Intel RST(e) AHCI/RAID Drivers & Software Set v13.5.0.1056 WHQL from this forum and installed it. After the restart, Disk management shows 1 entry ~2.8TB in size and when I go 'properties', the title shows 'Intel RAID 1 Array'. I'm assuming the hardware RAID worked then?

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