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Old 03-06-2014, 04:07 PM   #1
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Join Date: Jan 2014
Location: Michigan
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Default RAID0 Benefit & Configuration Issue

We have just assembled a new Edius Pro 7 editing platform (computer) which includes an ASUS Z87 EXPERT LGA 1150 R motherboard, an Intel i7 477K processor and two Seagate 3TB ST3000DM001 drives.

It is our desire to set-up these two Seagate drives to form a single volume in RAID0 configuration in the belief that in doing so, we will increase the I/O transfer rate (we understand that data can be sent/received from both drives simultaneously essentially doubling the possible transfer throughput).

We attempted to configure this RAID0 in what we thought was the normal fashion by setting the BIOS to RAID mode, then, using the DOS set-up software provided by ASUS, configuring a RAID0 volume. We did this and the DOS ASUS RAID set-up software confirmed that we had a single RAID0 volume of nearly 6TBs. However, the Windows 7 operating system disagreed and sees these individual drives as 746GB drives.

After a week of "playing-around" (including formatting these drives on another machine), we succeeded in securing a single Windows 7 "Drive E" (using the above BIOS setting approach) of nearly 6TB. Until . . .

Last night when we turned the computer back on . . . we found that the E-Drive was now only 3TB (a bit less) - - as if one of the Seagate drives was no longer part of Drive E array.

We ended up doing the following which seems to work. We turned OFF the BIOS RAID function. Windows 7 now sees the two Seagate drives correctly as 3TB each. We then configured a RAID0 (Striped) configuration using the Windows 7 software (i.e. Computer Management/Storage/Disk Management(local)). Each drive now reports as "dynamic" with size of 2,794GB and as part of one volume, Drive E.

Our question is: Is there any disadvantage in configuring this RAID0 array through Windows 7 as opposed to doing it at the BIOS level? Will we still achieve the advantages of speed we discussed above? And if this Windows 7 configuration is not legitimate, does anyone have any idea how to force Windows 7 to "see" these drives as 2.8TB drives when configured as RAID0 (via the BIOS method) as opposed to the 746GB that has been reporting once configured to RAID0 mode (again, using the ASUS BIOS set-up approach).

Thanks in advance for any insights. We'd like to solve this hardware problem before we get too involved in learning our new Edius Pro 7 program.

Winston is offline   Reply With Quote
Old 03-08-2014, 12:05 AM   #2
Join Date: Apr 2007
Location: Hillsboro, OR
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It's generally easier and more-portable to use Windows software RAID for RAID-0 striping. For fault-tolerant RAID, a hardware controller is recommended.

Check the CMOS battery of your system and cabling in your system. It should not have "suddenly forgotten" its configuration, and that happening when there's data on the array can mean days of work lost.

The fact that you had to fiddle with things so much gives me great concern... Having to mess with things until they "magically" worked also means repair/recovery will have to be equally "magical" (and way more frustrating).

Granted, RAID-0 pretty much has no repair/recovery if you lose an array member drive.
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Old 03-08-2014, 04:14 PM   #3
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Based on your comments and those in another nearby thread, we will stick with our current Windows 7 based RAID0 configuration (with the MoBo BIOS RAID implementation disabled). The good news here is that all the "fiddling" (uncertainty and unpredictability) we previously experiences was associated with the MoBo RAID approach. We have experienced nothing unusual, so far, with our current Windows 7 RAID configuration. Thanks for you comments.
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