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Raid 0 - SATA2/SATA3 mixture?

post #1 of 3
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I just got a hold of 2x WD1002FAEX (1TB Western Digital Black - SATA3), and I currently have a WD1001FAES (1TB Western Digital Black - SATA2). These models are about a year a part but they are the same capacity, and all have 64MB cache.

Now i'm wondering if anyone has tried Raid 0 on a mixture of SATA3/SATA2 drives? In theory it should work. Reason I ask is because I need 2TB-3TB of high sustained transfer rate space, and i'm either going to use the 2 FAEX drives in Raid 0 and sell the FAES, or put all 3 in Raid 0.

This partition is not going to be used for the OS, there's going to be a constant stream of data going through this partition (recording, etc). I'll be using onboard SATA, so i'm not sure 3 drives will really increase sustained transfer rate that much more.

Any ideas on what I should do?
Edited by Murlocke - 10/10/11 at 7:38pm
The Leviathan
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The Leviathan
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post #2 of 3
Quote:
Originally Posted by Murlocke;15253753 
I just got a hold of 2x WD1002FAEX (1TB Western Digital Black - SATA3), and I currently have a WD1001FAES (1TB Western Digital Black - SATA2). These models are about a year a part but they are the same capacity, and all have 64MB cache.

Now i'm wondering if anyone has tried Raid 0 on a mixture of SATA3/SATA2 drives? In theory it should work. Reason I ask is because I need 2TB-3TB of high sustained transfer rate space, and i'm either going to use the 2 FAEX drives in Raid 0 and sell the FAES, or put all 3 in Raid 0.

This partition is not going to be used for the OS, there's going to be a constant stream of data going through this partition (recording, etc). I'll be using onboard SATA, so i'm not sure 3 drives will really increase sustained transfer rate that much more.

Any ideas on what I should do?

Theoretical max throughput of SATA ports:

2x WD1002FAEX SATA3 6Gbps = 600MBps
1x WD1001FAES SATA2 3Gbps = 300MBps

2 Drive in RAID0 on SATA 6Gbps = Max throughput of 1.2Gbps.

3 Drives RAID0, 2 on 6Gbps, 1 on 3Gbps, all ports pass data at maximum 3 Gbps x 3 = 900MBps.

3 drives are theoretically slower than 2 drives on SATA 6Gbps.

Sell the WD1001FAES SATA2 3Gbps and get another WD1002FAEX SATA3 6Gbps to see the benefits of theoretical throughput 1.8 Gbps.
6GbDrives_03.jpg
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ケンジ
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post #3 of 3
A jump to SATA 6 Gbps will do nothing for a mechanical drive.
I would not hesitate to mix what you already have.
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