raid 5 with different drive models

[sdadept]

I have 3 wd 1tb black drives which I'm considering using instead of buying a bunch of new 2tb drives (speed is more important than total size for this array). Going to buy 3 more wd 1tb drives so I have 6 for a nice raid 5 array. The problem is that new wd 1tb drives are 64mb cache and sata 6mbps where as the older ones are 32mb cache and sata 3mbps. The card is a 3ware 9750 8i that I just purchased from newegg. Can I mix these two types together on the same raid 5 array? The sizes are the same but the drives are different.

 

[Blue Fox]

RAID only goes by size and nothing else. Not the best thing to do, but it will work. Technically you could use larger drives as well (they'll then be limited to the size of the smallest drive in the array).