Synology DS211+ SMB NAS Reviewby Ganesh T S on February 28, 2011 3:50 AM EST
For the purpose of NAS reviews, we have setup a dedicated testbed with the configuration as below. The NAS is directly connected to the testbed (using as many Cat 5E cables as there are ports on the NAS) without a switch or router inbetween. This is done in order to minimize the number of external factors which might influence the performance of the system.
|NAS Benchmarking Testbed Setup|
|Processor||Intel i5-680 CPU - 3.60GHz, 4MB Cache|
|Motherboard||Asus P7H55D-M EVO|
|OS Hard Drive||Seagate Barracuda XT 2 TB|
|Secondary Drive||Kingston SSDNow 128GB|
|Memory||G.SKILL ECO Series 2GB (1 x 2GB) SDRAM DDR3 1333 (PC3 10666) F3-10666CL7D-4GBECO CAS 7-7-7-21|
|PCI-E Slot||Quad-Port GbE Intel ESA-I340|
|Optical Drives||ASUS 8X Blu-ray Drive Model BC-08B1ST|
|Case||Antec VERIS Fusion Remote Max|
|Power Supply||Antec TruePower New TP-550 550W|
|Operating System||Windows 7 Ultimate x64 / Ubuntu 10.04|
In addition to the Realtek GbE NIC on-board the Asus P7H55D-M EVO, four more GbE ports are enabled on the system, thanks to the Intel ESA-I340 quad port GbE ethernet server adapter . With a PCI-E x4 connector, the card was plugged into the PCI-E x16 slot on the Asus motherboard.
Since the Synology DS211+ has only 1 GbE port, there was no need to team the four ports in the ESA-I340.
Intel NASPT is used to benchmark the NAS device. In order to ensure that the hard disk transfer rate is not a bottleneck, NASPT is run from the secondary drive in the testbed (the Kingston SSD). With average read and write speeds of 178.8 MB/s and 167.8 MB/s, it is unlikely that a single GbE link NAS can be limited in performance due to the test system. However, a link aggregated NAS could be affected. Fortunately, as we will see in the next few sections, this wasn't the case for the 5big storage server.
All file copy tests were also performed using the SSD. The file copy test consists of transferring a 10.7 GB Blu-Ray folder structure between the NAS and the testbed using the robocopy command in mirror mode (on Windows) and the rsync -av command (on Linux).
There are three important sharing protocols we investigated in the course of our evaluation of the DS211+. In the next few sections, you will find NASPT and/or robocopy/rsync benchmarking results for Samba, NFS and iSCSI sharing protocols. Each section also has a small description of how the shares were set up on the NAS. The NASPT benchmarks were run in Batch mode thrice, giving us 15 distinct data points. The average of these 15 values is recorded in the graphs presented in the following sections. The robocopy and rsync benchmarks were run thrice, and the average transfer rate of the three iterations is presented alongside the NASPT benchmarks.