hi, on the subject of raid, i was thinking of creating a software raid array using debian. I was wondering whether there were any flaws/bottlenecks in my plan.
a raid 6 array using 8 drives (7200rpm 8mB cache), connected to the sata2 connectors on my motherboard, (these are grouped into 2 groups of 4 connectors connected to 2 controller chips).
as they are sata2, the cache speed of the array should be 300MB/s*6=1.8GB/s, with dual channel ram at 400mhz*8=6.4GB/s, i should have a minimum of 4.6GB/s ram bandwidth for the rest of the system. i do not do any graphics intensive work at the same time as i use the harddrives intensively.
can anyone tell me the sort of processor load the harddrives would use at maximum, on a 2ghz amd64 processor?
are there any bottlenecks i have missed?
how would the amount of memory affect performance, i was thinking of 2x512mb sticks, would i see any difference with 2x1gb or 4x512mb, or 4x1gb, assuming timings are the same?
thanks.:)
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hi, on the subject of raid, i was thinking of creating a software raid array using debian. I was wondering whether there were any flaws/bottlenecks in my plan. a raid 6 array using 8 drives (7200rpm 8mB cache), connected to the sata2 connectors on my motherboard, (these are grouped into 2 groups of 4 connectors connected to 2 controller chips). as they are sata2, the cache speed of the array should be 300MB/s*6=1.8GB/s, with dual channel ram at 400mhz*8=6.4GB/s, i should have a minimum of 4.6GB/s ram bandwidth for the rest of the system. i do not do any graphics intensive work at the same time as i use the harddrives intensively. can anyone tell me the sort of processor load the harddrives would use at maximum, on a 2ghz amd64 processor? are there any bottlenecks i have missed? how would the amount of memory affect performance, i was thinking of 2x512mb sticks, would i see any difference with 2x1gb or 4x512mb, or 4x1gb, assuming timings are the same? thanks. :)