Asus P6T V2 using RAID kills SATA DVD drive

[paulj1x]

Just built a new computer, it's a screamer!

Three hard drives and 1 DVD drive are connected to SATA interfaces. Two hard drives are used as RAID 0. With this motherboard if you use the RAID controller, all SATA interfaces now go through the RAID controller and you appear to lose a lot, for example I can't tell what is using DMA.
Using Opti Drive I see that the DVD drive is very slow, maximum of 4X with CD. Older parallel IDE DVD drive on same motherboard gets up to 44X with same CD. However burst speed of SATA DVD is 46 MB/s and burst speed of IDE DVD is 33 MB/s.

Why is the throughput of the SATA DVD so slow?

Is there any way to connect the SATA DVD without going through RAID controller and still keep the RAID on the hard drives?

Any help is appreciated!!

Windows 7 64-bit
Motherboard: Asus P6T Deluxe V2 LGA1366 X58 RTL
CPU Intel Core I7 920 2.66GHz 45n R LGA1366
Memory: Corsair XMS3 DDR3 TR3X6G1600C8 G 2GBx3
HD 750GB (2 ea) Western Digital 7k 32m SATA2 WD7501AALS Black Caviar
HD 150 GB Western Digital WD1500HLFS Velociraptor
DVD burner: Sony-NEC AD-7241S-0B
Graphics: PNY Nvidia Quadro LVCQFX380-PCIE-PB FX380 RT
Card Reader: Nippon ICR-BB R
PSU: Corsair CMPSU-750TX 750W RT

 

[Jo6core]

I have exactly the same problem; Did you find a solution ?
I read somewhere that a PCI-SATA adapter might do the trick but I'm wondering if there might be a simplest way ?

 

[suat]

Can't you tell your motherboard which drives are to be used as RAID drives ? In raid volume setup, you should be able to do this. My Asus mb (P7P55D) can do this. I can choose which drives to include in RAID volumes. I do not know about your mb, though.

 

[Jo6core]

My configuration is
OS : Windows 7 Ultimate 64b
- Processor i7 - 980x, Motherboard: Asus P6X58D Premium
- 2 SSD Harddisks Crucial 256GB 6GB C300 plugged into the Marvell SATA III (6g) connectors and set on AHCI in the BIOS (OS boot is on one of them)
- 4 SSD 160GB 3GB Intel X25-M G2 plugged into the ICH10R SATA II connectors and configured as RAID0 in the BIOS
- 1 Blu-Ray/DVD drive Pioneer BDR-205 plugged into one of the ICH10R SATA II connector
- I installed the Intel drivers as recommended (did not reinstall after a recent BIOS flash though)
I'm getting stellar speeds on file copies / transfers except for the DVD drive : I ran the Nero drivespeed utility and I'm getting an average of 3.5 MB/s; Rips are crawling;
This does not sound right: I was expecting 40 or 50 MB/s reading speeds from that drive .

 

[paulj1x]

Can't you tell your motherboard which drives are to be used as RAID drives ? In raid volume setup, you should be able to do this. My Asus mb (P7P55D) can do this. I can choose which drives to include in RAID volumes. I do not know about your mb, though.

Yes, you can tell the motherboard which drives are used as RAID drives, in my case above only two of the four drives are used as RAID, but all four still go through the RAID controller and the two non-RAID drives lose a lot.