ExtremeTech has a review of the Norco DS-1220 eSATA storage box, which can accomodate up to 12 SATA disks. The price is pretty low (on Newegg.com it is $840 without disks).

The Norco DS-1220

I computed a small table that shows how much it will cost for a simple JBOD configuration. So, for less than $3000 you can get six terabytes in raw storage (therefore, 3 TB with RAID-10). Pretty competitive, and scales down nicely to whatever your storage needs are.

 

Disk capacity (GB)

Total capacity JBOD (TB)

Disk price

Total cost

$/GB

40

0.47

$32.99

$1,235.88

$2.57

60

0.70

$62.95

$1,595.40

$2.22

80

0.94

$36.95

$1,283.40

$1.34

120

1.41

$50.99

$1,451.88

$1.01

160

1.88

$48.00

$1,416.00

$0.74

200

2.34

$59.99

$1,559.88

$0.65

250

2.93

$63.00

$1,596.00

$0.53

300

3.52

$81.99

$1,823.88

$0.51

320

3.75

$86.00

$1,872.00

$0.49

400

4.69

$123.00

$2,316.00

$0.48

500

5.86

$177.00

$2,964.00

$0.49

750

8.79

$338.50

$4,902.00

$0.54

 

 

 

 

 

- Disk prices from http://www.pricewatch.com/hard_drives  

 

- Enclosure price: $839.99 from newegg.com

 

 

 

From this table, it looks like we are approaching nicely (and even passing) the theoretical 50 cents/TB limit, starting with around 160/200 GB disks. So, when fully loaded, this array scales down nicely as expected.  

 

 The formulas above should be obvious:

- Total cost = $839.99 + 12 * disk_price

- Total capacity (JBOD) = Disk capacity * 12.