You should check out this book;

http://btobsearch.barnesandnoble.com/booksearch/isbnInquiry.asp?userid=66H66JAQZW&btob=Y&isbn=0735612706&itm=1

-Mike

>Thanks
>
>By asking around this is what other people said
>
>Given the same number of effective disks the RAID 10 will be faster. RAID 5
>is the slowest for writes. But the key will be to have the log file on a
>separate RAID 1 than the data.