2x WD Blue 1TB
PROS:
- Ability to RAID
- At current price of $50 each, will cost less (total of $100) than a $125 WD Black 2TB
- Relatively quiet than the WD Black
- Partitioned physically (2 actual drives)
- If one drive fails, you still have another
CONS:
- More 3.5" drive space needed
- Might restrict interior airflow (depends on position of drive cages in case versus fans)
- More power needed to run 2x HDDs in use
- More heat generated
- More cable runs / clutter (SATA power but most especially SATA data cables)
- 1 less SATA port (might be a problem if you need more for ODD or SSDs)
1x WD Black 2TB
PROS:
- Faster speed than Blue's
- Less space and drive bays needed
- Better airflow inside case (due to lesser obstructions and less...