RAID 0/100mb harddrives doesn't seem fast

i have the Giga-byte GA-8PE667 Ultra motherboard. I'm running 2 AT100
harddrives in the raid 0 array but it doesn't seem as fast as it should be.
What kind of program can i use to test the data speed and what kind of
numbers should i be getting? 200mbs? I'm wondering if theres a setting i
don't have set. The other motherboards i used had a DMA enable settings on
the HD controllers and i'm not sure if theres anything like that here. I'm
running winxp w/ an NTFS file system. Thanks for any suggestions you have
on testing the speed!

Matt Warnock wrote:

i have the Giga-byte GA-8PE667 Ultra motherboard. I'm running 2 AT100
harddrives in the raid 0 array but it doesn't seem as fast as it should be.
What kind of program can i use to test the data speed and what kind of
numbers should i be getting?

HDTach. You'll need the commercial version, though.

200mbs?


Yeah right! Depending on your hardware, you might see something
around 70MB/sec.


-WD

If you are really interested in seeing what RAID 0 does for you then
download DiskSpeed32 and run same. Run DS32 on a single non-raid EIDE drive
and see the difference.

You should see around 50 mB/s as an average and you should see very little
right side fall-off. Assuming you are using a 65k or larger stripe.

The ratio of your avg speed to your max speed should be better than 90%.

Make sure your driver matches your BIOS in rev. levels. Make sure that a RCM
device driver is there.

DMA does not have any control over RAID configurations.

The max bandwidth on the PCI bus is 4X33=132 mB/s so don't look for any
200mB/s speeds. I have never seen any reliable source claim a 70mB/s speed
from any Parallel RAID configuration.

JPS



"Matt Warnock" wrote in message
. net...
i have the Giga-byte GA-8PE667 Ultra motherboard. I'm running 2 AT100
harddrives in the raid 0 array but it doesn't seem as fast as it should
be.
What kind of program can i use to test the data speed and what kind of
numbers should i be getting? 200mbs? I'm wondering if theres a setting i
don't have set. The other motherboards i used had a DMA enable settings
on
the HD controllers and i'm not sure if theres anything like that here.
I'm
running winxp w/ an NTFS file system. Thanks for any suggestions you have
on testing the speed!

well, at least i know i'm not nuts! I'm getting the EXACT same speeds on my
raid array as with my roommates single ide drive. around 48mb/s with the
burst read speed of 88mb/s. I would expect the results to be faster on
mine. Whats the deal?


"jpsga" wrote in message
news:AeDlb.1803$Tr4.8561@attbi_s03...
If you are really interested in seeing what RAID 0 does for you then
download DiskSpeed32 and run same. Run DS32 on a single non-raid EIDE
drive
and see the difference.

You should see around 50 mB/s as an average and you should see very little
right side fall-off. Assuming you are using a 65k or larger stripe.

The ratio of your avg speed to your max speed should be better than 90%.

Make sure your driver matches your BIOS in rev. levels. Make sure that a
RCM
device driver is there.

DMA does not have any control over RAID configurations.

The max bandwidth on the PCI bus is 4X33=132 mB/s so don't look for any
200mB/s speeds. I have never seen any reliable source claim a 70mB/s speed
from any Parallel RAID configuration.

JPS



"Matt Warnock" wrote in message
. net...
i have the Giga-byte GA-8PE667 Ultra motherboard. I'm running 2 AT100
harddrives in the raid 0 array but it doesn't seem as fast as it should
be.
What kind of program can i use to test the data speed and what kind of
numbers should i be getting? 200mbs? I'm wondering if theres a setting
i
don't have set. The other motherboards i used had a DMA enable settings
on
the HD controllers and i'm not sure if theres anything like that here.
I'm
running winxp w/ an NTFS file system. Thanks for any suggestions you
have
on testing the speed!