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Hi,
I'm new to this forum, and also to Windows as I was fed up with hardware limitations on the Mac. I guess that makes me a switcher.
I bought an ARECA 1230ml raid controller recently that I couldn't get to work on my EVGA 780i mb Win XP system (Q6600). The Adaptec 5 series just came out, so I returned the ARECA for the 51645 card and I have been having a lot of fun trying to figure it out. I can't find out much about the Adaptec 51645 card using google, so I will try to extract some information from this forum.
I kept buying Raptor-X 150 drives until the performance gave out which seems to be at about the 4 disk raid 0 level. Using HDTach 3 I managed about 900 gb burst and 380 Gb Ave. Read with this array.
After adding a fifth Raptor I noticed the performance went down slightly. Does this make sense? I had the impression that there should be much more room for improvement with the 1.2 GHz IO341 processor.
Since giving that up, I tried different array types and I found that;
1. With a raid 1E or 5EE array the card won't boot.
2. With a raid 5 array I lost 2/3 storage space with negligible performance hit.
3. Turning NCQ off reduced performance by up to 50%
4. Turning on array background check yielded negligible performance loss.
5. Using drives formatted without using the RAID controller produced lousy performance until formatted from within the array bios (even drives formatted on a different Adaptec card - 1430SA).
6. I couldn't install Vista 64 with any raid array (I think this is an NVidia 780i mb problem).
Any comments? I am more into performance than storage space. I would mess with the SAS drives that this card can handle, but they are a bit expensive for me.
John
I'm new to this forum, and also to Windows as I was fed up with hardware limitations on the Mac. I guess that makes me a switcher.
I bought an ARECA 1230ml raid controller recently that I couldn't get to work on my EVGA 780i mb Win XP system (Q6600). The Adaptec 5 series just came out, so I returned the ARECA for the 51645 card and I have been having a lot of fun trying to figure it out. I can't find out much about the Adaptec 51645 card using google, so I will try to extract some information from this forum.
I kept buying Raptor-X 150 drives until the performance gave out which seems to be at about the 4 disk raid 0 level. Using HDTach 3 I managed about 900 gb burst and 380 Gb Ave. Read with this array.
After adding a fifth Raptor I noticed the performance went down slightly. Does this make sense? I had the impression that there should be much more room for improvement with the 1.2 GHz IO341 processor.
Since giving that up, I tried different array types and I found that;
1. With a raid 1E or 5EE array the card won't boot.
2. With a raid 5 array I lost 2/3 storage space with negligible performance hit.
3. Turning NCQ off reduced performance by up to 50%
4. Turning on array background check yielded negligible performance loss.
5. Using drives formatted without using the RAID controller produced lousy performance until formatted from within the array bios (even drives formatted on a different Adaptec card - 1430SA).
6. I couldn't install Vista 64 with any raid array (I think this is an NVidia 780i mb problem).
Any comments? I am more into performance than storage space. I would mess with the SAS drives that this card can handle, but they are a bit expensive for me.
John