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 “Connect NAS to your Computer Directly”

How to Fix Windows 8 Boot Error

When I was setting up my new Lenovo C440, Windows 8.1 refused to boot after a restore from ClonZilla. and complains about error in boot partition. It try to fix automatically but still fail to boot.

I can see my Windows partition but not sure what’s the problem. It was recovery by fixing master boot record (MBR), boot sector, and rebuild the boot configuration data (BCD).

If you have the same boot fail problem like me, try to fix them first.

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