Parity Drive placement between ICH10 or JMB363?

[erikatcuse]

I will have a MSI P43 Neo3-F (8 SATA ports) http://www.newegg.com/Product/Product.aspx?Item=N82E16813130185R soon and it has 6 ports on the ICH10 and 2 on the JMB363.  I've looked for bock diagrams of this mobo and couldn't find any.

 

I've searched the forums and the wiki and I know I should us ACHI if possible...I'll do a HD speed check with and without it.

 

The question is with an IDE system I alternated controllers and had the Parity drive as primary0.  With this all SATA setup where should I put the parity drive?  Since the JMB363 only has 2 drives on it would it be better to put it there?  In the end I'll probably do a speed check with a drive first attached to the ICH10 and then the JMB363 but will that stress the system as much as a parity check would?

 

Thanks

Erik

 

 

[RobJ]

Just curious, did you have a chance to test this?  I suspect a number of users with both ICH and Jmicron chipsets would like to know.

[erikatcuse]

I might this weekend...I just got 3 more 4-3 KF-4000 trayless bays the 2 hard drives sitting on top of the case can be put away.  Also I'm hoping the SAS8031E-R I just bought will work so I can test all 3 controllers out.

 

Erik

[GK20]

I will have a MSI P43 Neo3-F (8 SATA ports) http://www.newegg.com/Product/Product.aspx?Item=N82E16813130185R soon and it has 6 ports on the ICH10 and 2 on the JMB363.  I've looked for bock diagrams of this mobo and couldn't find any.

 

You can find the block diag from this link (product brief PDF), looks like this chip is connected to system through PCI-Express interface. That is why unRAID see those SATA disks connected to this chip at same bus as those IDE disks.

 

http://www.jmicron.com/JMB363.html

[erikatcuse]

I've done 2 parity checks.  I have 6 1TB drives with the parity drive being a seagate with 32mb cache.  With all drives on the ICH10 I had a check speed of 58MB/Sec.  With the parity drive on the JMB363 the check speed was 55MB/Sec this was checked about an hour and half into the check both times.

 

Once 4.5beta 2 comes out and if my LSI SAS3081E-R works I'm going to put all the drive on it and perform a check.  After that I'll stagger the drive across the 3 controllers and see what it is.  I have a felling though they'll all be about the same but you never know.

 

Erik

[RobJ]

But already it looks like there is no advantage to isolating the parity drive on the JMB363.  I thought there might be.

 

Were both controllers setup as AHCI?

[erikatcuse]

Yes both are setup as AHCI and in the syslog all are uplinked at 3.0Gbps.  Before I made my current drive parity I also did a hdparm -tT /dev/hda check on all my drives and this one was constantly the fastest of the 6.