Setup RAID 0 in BIOS and Windows?

Asus M2npv-vm motherboard
November 29, 2009 at 11:09:43
Specs: Windows Server 2008 R2, AMD Athlon64 Dual Core 3800+ / 4GB
I have 3 hard drives in my PC. My 500GB C drive that Windows Server 2008 R2 is installed on to, and two 1.5TB drives that I want to setup RAID 0 (mirroring) on for data storage.

Now, I had this all setup previously in Windows Server 2003. The process I had to go through to install the RAID was to first enable RAID in the BIOS, and then create the RAID 0 array using the BIOS tool (hardware RAID). From there I booted into Windows and went into the Disk Management utility. In here Windows recognized both of the drives as being separate, so I had to convert them both into dynamic disks and format them, and then create a new mirrored volume, specifying to use the 2 hard drives for the mirrored volume (software RAID).

So now I've updated my system to Windows Server 2008 R2, and after I did so, Windows complained that one of the drives on the raid had errors, and I ended up backing up my data and having to delete the raid volumes. So now I'm just trying to setup a fresh RAID configuration. If I disable RAID in the bios, then both of the hard drives show up in the Windows Disk Management utility. However, if I enable RAID and create the array in the BIOS, then the Windows Disk Management utility only recognizes one hard drive.
So my question is, do I need to create both a hardward RAID and software RAID like I did in Windows Server 2003 (since I apparently can't create a software RAID in 2008)? Will using just the hardware RAID still write my data to both drives? And since I am not creating a software RAID, do I still need to convert the disk to a dynamic disk?

Thanks in advance.

-- God is my favorite fictional character

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November 29, 2009 at 12:04:28
You should only have one (either hardware or software). If you setup a RAID 0 array, but Windows 2003 still showed two disks, you did not setup a RAID 0 array. In Windows, you should see a single, 1.5TB drive. In the RAID manager (through the BIOS) you should see both 1.5TB drives configured in RAID 0.

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November 30, 2009 at 08:12:39
Raid 0 is stripping not mirroring. Raid 1 is mirroring. Raid 0 is not recommended for anything because it has no fault tolerance and does not add speed to the system.

deadlydog if 2003 saw the drives as two drives you did not, and I repeat, you did not create any raid array at the hardware level. You only have a software mirror with dynamic disks. A waste of raid hardware.

If you do hardware raid you do not need to convert to dynamic disks.

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November 30, 2009 at 08:26:49
Oh, yes, I meant that I'm using RAID 1 (mirroring). Thanks for correcting me wanderer. And I'm sure that I had created the RAID array in the BIOS as well when using Windows Server 2003, but maybe 2003 didn't have the correct RAID controller drivers so it didn't detect it properly? I'm not sure, but I do have it all working properly now on 2008 using only the hardware RAID, and I did not convert to a dynamic disk. Thanks for the helpful advice.

-- God is my favorite fictional character

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