I have purchased a SATA 3.0 rocketRAID 640 and four Sata3.0 640Gb Western Digital Black Edition HD's.
My current setup is one 64Gb crucial SSD for Windows 7 x64, and plan to use the 4 drives in Raid10.
What is the best practice on Raid Arrays managed by a separate controller. (Forgetting the SSD) If I wanted to install the OS on the 4 drives, would I get better performance if I created let's say an 80Gb Raid0 array across all four drives and used the remaining space for a Raid 10 array? This would mean 2 raid arrays on the same controller across the same drives. OR. Would it be best to just create 1 Raid 10 array and within that array create 1 small partition for the OS and one partition for Storage? Throughout much searching I have yet to find a complete answer.
Does the performance decrease when 2 arrays are created across the same drives? Is partitioning a better practice then separate arrays? For Example, let's say I wanted to have some redundancy in my OS partition or array. Would it be better to create a Small Raid 10 array for the OS and a large Raid10 array for storage, or a single Raid 10 array and 2 partitions?
Even if I don't install an OS, on one partition, would creating two Raid 10 500Gb array's across the same 4 drives perform worse/better than one Raid 10 array and 2 500Gb partitions?