The purpose of the system is as a budget NAS for recording music, and as a backup store for various workstations. It will have a UPS and ECC memory.
Currently, I need about ~2.5TB, and should be able to keep my requirements under 4tb by archiving old projects to blue-ray disks. But that 2.5-to-4tb needs to be near bullet-proof, near silent, and as affordable as possible. I currently have one 2TB WD Red which can go to this system, and to also stagger age/failure. Assuming 2TB WD Reds cost $100, 4TB cost $200, and 3TB cost $130, what is the best route to cheap and near bullet-proof? 4TB WD Red Pros cost $269. I would be buying half the drives from one store, and half from another. Let's assume a constant 10% chance of a drive suddenly dying. Please help me with the math, and also estimated rebuild times, and the risk of losing everything during the rebuild. I ruled out HGST because of the yowling cat sound I remember from back in the day, and Seagate because the seek/write clicking is much more apparent than the WD Reds. From what I can tell, these are my options:
a) 3x2TB RAIDZ1 = 4TB, $200, 3 spindles ~6 platters. Risky?
b) 4x2TB RAIDZ2 = 4TB, $300, 4 spindles ~8 platters. Noisiest? Safe?
c) 2x3TB mirror = 3TB, $260, 2 spindles ~6 platters. More risky than (a)? Quieter than (a)?
d) 3x3TB dual mirror = 3TB, $390, 3 spindles ~9 platters. Safest?
e) 2x4TB mirror = 4TB, $400, 2 spindles ~8 platters. Most dangerous? Quietest?
f) 3x4TB dual mirror = 4TB, $600 -- Over budget.
g) 2x4TB Pros mirror = 4TB, $540, 2 spindles, ~8 platters. Expensive. Noisiest? As safe as (b)?
[edit] I had two ds, so I corrected the lettering. Oops!
Currently, I need about ~2.5TB, and should be able to keep my requirements under 4tb by archiving old projects to blue-ray disks. But that 2.5-to-4tb needs to be near bullet-proof, near silent, and as affordable as possible. I currently have one 2TB WD Red which can go to this system, and to also stagger age/failure. Assuming 2TB WD Reds cost $100, 4TB cost $200, and 3TB cost $130, what is the best route to cheap and near bullet-proof? 4TB WD Red Pros cost $269. I would be buying half the drives from one store, and half from another. Let's assume a constant 10% chance of a drive suddenly dying. Please help me with the math, and also estimated rebuild times, and the risk of losing everything during the rebuild. I ruled out HGST because of the yowling cat sound I remember from back in the day, and Seagate because the seek/write clicking is much more apparent than the WD Reds. From what I can tell, these are my options:
a) 3x2TB RAIDZ1 = 4TB, $200, 3 spindles ~6 platters. Risky?
b) 4x2TB RAIDZ2 = 4TB, $300, 4 spindles ~8 platters. Noisiest? Safe?
c) 2x3TB mirror = 3TB, $260, 2 spindles ~6 platters. More risky than (a)? Quieter than (a)?
d) 3x3TB dual mirror = 3TB, $390, 3 spindles ~9 platters. Safest?
e) 2x4TB mirror = 4TB, $400, 2 spindles ~8 platters. Most dangerous? Quietest?
f) 3x4TB dual mirror = 4TB, $600 -- Over budget.
g) 2x4TB Pros mirror = 4TB, $540, 2 spindles, ~8 platters. Expensive. Noisiest? As safe as (b)?
[edit] I had two ds, so I corrected the lettering. Oops!
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