Hello,
I was recently running 2010.03 on an ASUS M2NPV-VM motherboard, which had a 
stepping 15 AMD CPU which didn't support power management. So I "upgraded" to 
another motherboard I had around, a Gigabyte GA-P35-DS3L with Core 2 Duo E7200. 
Same RAM sticks, so 8GB DDR2 800.

I noticed Solaris was taking a long time to boot. I have two pools in this 
machine:

2x IDE (PATA) 160GB zfs rpool (mirror)
4x SATA2 1TB named 'tera' (3TB raidz)

When dd'ing from a zvol (dsk or rdsk) from rpool, I get about 9 MB/s reads or 
writes. I used to get about 60-80 on the AMD machine.

When doing the same from 'tera' i get about 60MB/s. In the AMD machine I used 
to get over 150MB/s.

With files (dd from a file to /dev/null) I get similar results: about 9MB/s the 
first time (sequential read?) and 138MB/s the next time (cache?).

I can understand that there might be some issues for the IDE drive as it uses a 
JMB 368 chip (I have read JMicron controllers aren't exactly great). Is there a 
way to improve this?

And the other problem is the "big" raidz, I'm getting really bad performance 
for that too. 

Any suggestions? Attached is prtconf -v
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