Buffalo NAS LS-QVL8.0TL/R5

The following tests are done with a empty RAID5 array (0% full), 4x Samsung disks pre-built at factory (Buffalo LS-QVL8.0TL/R5). No jumbo frames.

Raid 5 performance using NAS tester (Text data for search engine purposes)
NAS performance tester 1.2 http://www.808.dk/?nastester
Running warmup...
Running a 400MB file write on drive Y: 5 times...
Iteration 1: 35.04 MB/sec
Iteration 2: 34.29 MB/sec
Iteration 3: 35.69 MB/sec
Iteration 4: 34.3 MB/sec
Iteration 5: 35.63 MB/sec
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Average (W): 34.99 MB/sec
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Running a 400MB file read on drive Y: 5 times...
Iteration 1: 66.51 MB/sec
Iteration 2: 64.23 MB/sec
Iteration 3: 64.32 MB/sec
Iteration 4: 62.53 MB/sec
Iteration 5: 63.16 MB/sec
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Average (R): 64.15 MB/sec
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Raid 5 performance using Crystal Diskmark


Raid 5 performance using ATTO Disk Benchmark


Raid 5 performance using Intel NAS Performance Toolkit (NASPT)
This will be useful when comparing to the SmallNetBuilder NAS Charts v4++.
TBD

Kinematics

Question
An engine of mass M works with a constant tractive force F against a resistance proportional to the square of its speed. The maximum speed it can reach is U. Calculate the time it takes to reach 1/2 the maximum speed.

Answer