What Drive manufacturer / model should be Purchased for a 3TB swappable spare

These drives should have a swappable spare for Raid 5 or 6 drive rebuild upon a drive failure. Best practices suggest having a spare available that can be swapped in immediately upon the notification of a drive failure, especially or Raid 5. What drive should be purchased for the best reliability, speed and cost?

PROMISE Pegasus2 R6 RAID System

PROMISE Pegasus2 R6 RAID System

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