Two Raptors 74GB on Promise raid chip

[Richard K Rabbat]

I have two WD Raptors on the Promise chip (20378) on a Asus A8V deluxe v2.
I ran HDtach 3.0 and it showed that I was slower than an Array with two ATA6
drives. My score compared to the ATA6 drives was 117mbs vs 121mbs to the
ata6.

Am I doing something wrong? After I installed the drives on the board and I
built the array with 16k blocks set up for performance. I did not do the
auto setup. Should I have?

Should I use the VIA on board RAID chip (VT8237R)? Will it give me better
performance?

any help is appreciated,
Thank you,
Richard

 

[Mark A]

I have two WD Raptors on the Promise chip (20378) on a Asus A8V deluxe v2.
I ran HDtach 3.0 and it showed that I was slower than an Array with two
ATA6 drives. My score compared to the ATA6 drives was 117mbs vs 121mbs to
the ata6.

Am I doing something wrong? After I installed the drives on the board and
I built the array with 16k blocks set up for performance. I did not do
the auto setup. Should I have?

Should I use the VIA on board RAID chip (VT8237R)? Will it give me better
performance?

any help is appreciated,
Thank you,
Richard

Could you review your post and make sure there are no typos? I do understand
the two different configurations that you tested with and are trying to
compare.

 

[Paul]

I have two WD Raptors on the Promise chip (20378) on a Asus A8V deluxe v2.
I ran HDtach 3.0 and it showed that I was slower than an Array with two ATA6
drives. My score compared to the ATA6 drives was 117mbs vs 121mbs to the
ata6.

Am I doing something wrong? After I installed the drives on the board and I
built the array with 16k blocks set up for performance. I did not do the
auto setup. Should I have?

Should I use the VIA on board RAID chip (VT8237R)? Will it give me better
performance?

any help is appreciated,
Thank you,
Richard

A Promise 20378 sits on the PCI bus. Due to overhead on the
PCI bus, there is a limit to how fast it will go, that falls
short of 133MB/sec. I don't know if the Via uses PCI internally
for its interface, or some other faster bus bridge.

There is some info here:

http://www.via.com.tw/en/products/chipsets/southbridge/vt8237/drivestation.jsp

Paul

 

[Ulrich Müller]

I have two WD Raptors on the Promise chip (20378) on a Asus A8V deluxe v2.
I ran HDtach 3.0 and it showed that I was slower than an Array with two
ATA6 drives. My score compared to the ATA6 drives was 117mbs vs 121mbs to
the ata6.

Am I doing something wrong? After I installed the drives on the board and
I built the array with 16k blocks set up for performance. I did not do
the auto setup. Should I have?

Should I use the VIA on board RAID chip (VT8237R)? Will it give me better
performance?

Yes, you should use the VIA Controller !

Ulrich -ger