Okay so I have just bought a new 1TB HDD. That means now I have 3 1TB drives and 1 2TB drive. I was initially thinking about using the 3 1tb drives in raid 5 (using mdadm) and just finding some other use for the 2tb drive. It occurred to me, though, that I could partition the 2tb drive into two 1tb partition and create a "5 device array" using mdadm. My question is how would the performance of this 5tb array compare to the 3tb array that uses all separate drives? Would it be faster or slower? Maybe the answer is different for worst case vs best case vs average case? Any insight would be great.
Also is there any other more clever scheme that I could use to get more storage/performance from these four drives?
Edit: I have just realized that if the 2tb drive were to fail it would destroy a RAID 5 array. In light of this new info I would have to use raid 6 if I were to make a 5tb array. This would still give me an additional tb of storage in my primary array though so I guess the question is now all the drives in RAID 6 vs the three drives in RAID 5. Which would have better performance?
Also is there any other more clever scheme that I could use to get more storage/performance from these four drives?
Edit: I have just realized that if the 2tb drive were to fail it would destroy a RAID 5 array. In light of this new info I would have to use raid 6 if I were to make a 5tb array. This would still give me an additional tb of storage in my primary array though so I guess the question is now all the drives in RAID 6 vs the three drives in RAID 5. Which would have better performance?