QNAP TS-451D2-4G 4-bay NAS Review

We tested the TS-451D2-4G with a number of scenarios that it may face in the real world. The settings for these scenarios are as follows.

File Server
512MB file size, 16KB Block size, 80% Read 20% Write 100% Random, I/O queue depth 128

Web Server
1GB file size, 16KB Block size, 100% Read 0% Write 100% Random, I/O queue depth 64

Workstation
Transfer Size: 8K Reads: 80% Writes: 20% Random: 80% Boundary: 8K Outstanding IO: 64 Threads/Workers 4

Database
2GB file size, 4KB Block size, 90% Read 10% Write, 90% Random, 10% Sequential, I/O queue depth 128

Media Streaming
160GB file size, 64K Block size, 98% Read 2% Write, 100% Sequential, Boundary: 4K, I/O depth 64, Threads/Workers: 8

Mail Server
80GB file size, 32K Block size, 58% Read 42% Write, 95% Random, Boundary: 4K, I/O depth 64, Threads/Workers: 8

Video On Demand
160GB file size, 128K Block size, 100% Read, 100% Random, Boundary: 4K, I/O depth 512, Threads/Workers: 8

Digital Video Surveillance
160GB file size, 128K Block size, 90% Read 10% Write, 100% Sequential, Boundary: 512K, I/O depth 64 Threads/Workers: 8

We also tested the NAS in a few scenarios it might be used for in an office environment. It produced average bandwidth speeds of 139.25MB/s and 114.164MB/s for the File Server and Web Server tests respectively, 34.92MB/s for the Workstation test and 118.74MB/s when tested with the Database trace.

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