Elliott C. Back: Internet & Technology

In this post, I’ll be reviewing a brand new Synology DiskStation DS1511+ NAS equipped with five Hitachi Deskstar 2TB 5K3000 drives configured in RAID5. For comparison, I’ve also written about the Gen 1 Drobo’s performance as a NAS before (it tops out around 20MB/s), and own two of them at home. While the Drobos allow you to build mix-and-match RAID arrays, they are slow, take forever to rebuild, noisy, and hot. I am hoping the DS1511+ will remedy all of these issues.

Read more about the DS1511+ specs here

Network Base Configuration

The Synology NAS is using default MTU of 1500, connected to a Gigabit Ethernet Switch on LAN2. Testing with iperf shows a good gigabit connection between my PC and the NAS of around 885Mb/s:

Big_Bug> iperf -s
————————————————————
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
————————————————————
[ ID] Interval Transfer Bandwidth
[ 7] 0.0-20.0 sec 2.05 GBytes 882 Mbits/sec
[ 6] 0.0-30.0 sec 3.09 GBytes 885 Mbits/sec

In megabytes per second, we can transfer 110.625 MB/s. As you will see, this is actually slightly lower than the performance of the RAID array.

The Hard Drives

How fast are the triple-platter 2TB deskstar 5K3000s in RAID5? It can do a very reasonable 125 MB/s in unbuffered pure-disk performance:

Big_Bug> hdparm -t /dev/sda
Timing buffered disk reads: 374 MB in 3.01 seconds = 124.22 MB/sec

Benchmarking File Copy from Windows

To test how fast I can transfer from my PC to the NAS, I’ve created a 4GB binary file:

C:\Users\Elliott Bäck\Desktop>ls -l test.file
-rw-rw-rw- 1 Elliott Bäck 0 4693544330 2011-04-19 20:00 test.file

Copying this file in Windows 7’s explorer took just 50.5 seconds. Doing the math, this gives us an average write rate of 88.63 MB/s. How fast can we copy it back? It took 71.6 seconds, for an average read rate of 62.51 MB/s. Both of these number are going to be constrained by how fast my desktop PC’s Intel SSD can read/write. I also tested using Java and writing a RandomAccessFile with a ByteBuffer, which achieved 95MB/s write and 97MB/s read on a 1GB file.

Reliability & Temperature

You just need to open up the storage manager on the Synology DS1511+ NAS to see what a beauty it is, giving you a full SMART status readout on all your physical drives, as well as their temperatures. Even after running through my benchmarking, the drives were only 34^° C warm:

Conclusions

At nearly $900 for the NAS itself without drives, it’s pricey. But plugged into a Gigabit ethernet, the DS1511+ from Synology is also fast, cool, and quiet; the three things you want most from a NAS. Featurewise, it has a glorious UI, media servers built in (which I don’t use) and expandibility from 5 to a maximum of 15 drives. I anticipate phasing out my Drobos, with their proprietary technology, for the Synology NAS, which runs on open-source plain-vanilla linux.

This post is a followup to the quite dated tutorial I wrote in 2005, called How to rip a DVD: A Tutorial. At that time, DVD decrypter and AutoGK were the tools of choice, but they’ve been supplanted as technology has improved by more user-friendly, automatic programs.

As of 2011, I would recommend using Handbrake, an open-source multithreaded and cross-platform ripper which works on Windows and Apple Mac OS both!

Step 1: Download & Install

Please download and install Handbrake to get started. At about 6MB, it shouldn’t take more than a minute.

Step 2: Launch the DVD Ripper

Put in your DVD and launch Handbrake. You should be greeted with an informative screen similar to the following:

By default, nothing is selected yet. There are a few options you can set, such as your preferred subtitle capture language and dubbing language preferences. I prefer the movies in original audio with English subs.

Step 3: Select the Source

I just popped in a Coen Brothers DVD, so when I click on the “Source” dropdown, it shows up there right away. Unfortunately, you can’t directly rip a commercial DVD this way. You need to dump it to disk with DVD Decrypter, after which you can select a DVD rip saved to a folder on your harddrive:

After some time (“Processing Title: 1 of 15…”) you will see the main screen populated with information. If you get stuck on the “processing title” bit, remember you need to open a folder you saved from DVD Decrypter (the decryption will take 20-30 minutes for a feature film).

Step 4: Choose a Title

Titles are like the chapters of a DVD. Usually there will be a single long title that contains the movie, like the 1 hr, 56 minute “Title 1″ I am selecting:

Step 5: Choose Output Settings

You have a lot to choose from. You can pick one of the Handbrake presets for iPod/iTouch/iPad, or customize one of your own. I’m going to use the “High Profile” setting to watch on my PC, but override the target file size to 2 CDs, or 1400 MB:

Step 6: Encode the video

Just click the “Start” button to kick things off, or “preview” to make sure you’re OK with the quality:

It’s going to take me about 52 minutes to encode this; on my i7 with 4 cores x2 hyperthreading, CPU usage is at 100%.

Finally…

If anything goes wrong, there’s an entire Handbrake community who can help you out. Why don’t you start by looking at their How To Request Support for HandBrake thread?

Chinese readers should check out Wendy’s great post 来自谷歌首页的圣诞祝福!

Combining 17 different images together, Google’s prime Doodler Micheal Lopez spent 250 hours to create their latest Christmas-card masterpiece, a beautiful, abstract rendition approximating the Google logo. According to the WSJ, Chief-Doddler Lopez said, “We want to end the year with a bang.”

As seen on Google’s homepage

Each of the 17 images represents an image of holiday cheer, a sort of cultural Christmas card. So, the entire Google represents a global merry Christmas! Below, I will explode each image into its component links.

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