Hey, i am currently trying to create a new raid array i have 4x3tb drives i want do something like having 2 and 2 drives mirrored so that i end up whit 6tb usable space. I dont want to do a raid-10 array since i want too have the ability to expand my array. i currently have a LSI MEGARAID SAS 9240-8I any suggestions?
Thanks for the help
RAID 5 would work and gives you parity for some measure of failsafe
You could theoretically do RAID 2 - but I don't think ANYONE uses RAID 2
You can also do raid 3 or 4 but really if you want 6tb of space, and fault tolerance, then two raid 0 arrays with one mirroring the other will give you the best balance of speed and security. If you want to expand, then raid 5 but I dont know if it can be done without rebuilding the entire array - i'm sure as hell no expert and only ever used raid 0 and raid 0 +1
I don't think any raid array can be expanded by simply adding a drive and placing it in the array. I believe you must re-create the array every time you add a drive, or not add the extra drive to the array at all. I agree with Vandal, two raid 0 arrays with one mirroring the other will give both speed and a security layer. Or do RAID 5 with all 4 drives.