RAID-5 write speed 3,000% slower then single drive

[nate]

Write speed of a single drive when not setup in a raid array is 37.8 MB/second

Write speed to the drives when in a raid 5 array is 0.89 MB/second.

Can anyone help on why the write speed is so slow. It is very noticeable. I'm constantly waiting on the hard drive light to go off before I am able to do anything.

CPU:

Intel® Pentium® 4 CPU 3.20GHz

Motherboard:

Model: P5ND2-SLI

Manufacturer ASUSTeK Computer INC.

Model P5ND2-SLI

BIOS Vendor Phoenix Technologies, LTD

BIOS Version Nvidia - 42302e31

BIOS Release Date 08/06/05

Hard Drives:

1. Hitachi Deskstar 7K80 80GB 7200RPM 8MB Buffer SATA-II

2. Hitachi Deskstar 7K80 80GB 7200RPM 8MB Buffer SATA-II

3. Hitachi Deskstar 7K80 80GB 7200RPM 8MB Buffer SATA-II

Raid-5:

Name NVIDIA RAID5 153.38G

Capacity 153.38 GB

NVRAID Driver 5.10.2600.529

Memory:

Total Physical Memory 2.00 GB

Frequency 667.0 MHz

Video:

NVIDIA GeForce 6600 GT Driver 7.1.8.9

NVIDIA GeForce 6600 GT Driver 7.1.8.9

Sound:

Realtek AC'97 Audio Driver 5.10.0.5820

[ripken204]

could be a crappy controller, the write speed should not even be half of normal

[scankurban]

Please forgive me.is it single controller or mainboard supported raid configration.

[nate]

I have not added any raid controllers to the montherboard.

From motherboard box...

Storage/RAID

nForce4 Storage:

4 x SATA II

2 x UltraDMA 133/100/66/33

NVRAID : RAID0, RAID1, RAID 0+1, Software RAID 5, and JBOD spam cross SATA and PATA

[Marthax]

And I assume that you got the latest drivers for your SATA controller?