Match Hard Disk Startup Current with Power Adapter Output Current

When I was looking for a new hard disk for my Network-attached storage (aka NAS), I found the startup current of Seagate ST2000DM001 (aka Barracuda or Desktop HDD) in my Buffalo HD-LX2TU3 is 2.5A and output current of the adapter is 1.5A. It requires 67% higher than the adapter could offer. Is it safe use of electricity usage and okay to my hard disk?

I didn’t know and decide to research.

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File Transmission with Different Sharing Solution on NAS

Because I want to select the best solution to backup my files from Lenovo ThinkCentre Edge 72z 3574-U3V to QNAP TS-112, I prepare a test to collect data. I made a sample backup with one 3.3GB VDI file, 851 jpeg photos for 2.9GB, and 6 AVI video for 911.2MB. Lenovo ThinkCentre Edge 72z to QNAP TS-112 are connected directly via Gigabit Ethernet.

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Connect NAS to your Computer Directly

My Lenovo ThinkCentre Edge 72z comes with USB 2.0. Its maximum throughput is 480Mbit/s but the effective is about 35 MB/s or 280 Mbit/s. I want to improve file transfer speed between my computer with external hard disk by replacing USB 2.0 with Gigabit Ethernet which provides higher bandwidth.

If I connect my QNAP TS-112 which has a gigabit ethernet to TL-WR842ND which supports wireless 802.11n with maximum 300MBit/s and wired fast ethernet with maximum 100Mbit/s, the bottleneck will limit the transfer speed to 100Mbit/s. There are two solutions to improve: get a faster wireless router or connect TS-112 to ThinkCentre Edge 72z directly.

Because my ThinkCentre Edge 72z connect to TL-WR842ND via wireless 802.11n, I have an empty gigabit ethernet. Therefore, I choose to connect TS-112 with gigabit ethernet directly. TS-112 may access internet through the wireless connection on ThinkCentre Edge 72z when it is working.But nobody may see it, even we share the same wireless router. Continue reading