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In my first two posts on building an editing workstation, I covered the motherboard / processor and memory and video cards. In this last post, I want to cover the other really crucial component of any workstation, the hard drive.

Hard Drive

The hard drives you throw into your system and their configuration can have quite an impact on performance. The hard drive affects how long it takes to load your software and affects how fast your computer reads and writes those large video files. Since there are so many variables here, I’ll spend the most time discussing this topic.

First, let’s talk about the drives themselves.

Currently, hard drives are incredibly inexpensive. It’s common to find 1TB 7200-rpm 32MB cache drives for under $100. If you have some extra cash to spend, Western Digital has the Velociraptor 10,000-rpm drives. The latest technology is the solid state drives (SSD), but they’re extremely expensive and I wouldn’t recommend them…yet.

Now let’s talk about configuring your drives.

The configuration of your hard drives and manner in which they work with your system can be just as important, if not more important than the drives themselves. The first rule of thumb is to use more than one hard drive. You want to have one hard drive for your operating system and software with your data (i.e. video files) on separate drives. The reasoning for this is simple. If your computer gets a virus, your data is not affected and it’s easy to wipe the drive and reinstall your software. It also increases performance because your computer isn’t reading and writing to the same hard drive simultaneously.

The next common configuration that many people will recommend is to RAID your drives. There are many configurations of RAID, but the one that most people refer to (in terms of video performance) is what’s called striping, or RAID 0. With RAID 0, two hard drives are used together to create one logical drive.

For example, two 500GB drives would be striped together to create one 1TB drive. This increases the performance substantially, allowing data to be read and written faster, since the drives are working together. In the case of an editing workstation, if RAID 0 were to be used, a minimum of four drives would be required – two drives for the operating system and two drives for video storage.

Some users would go as far as using six drives in the RAID, using two drives for the operating system/software, two drives for captured video, and two drives for rendered video. Now while there is a substantial performance increase in running a RAID 0 configuration, there are also a couple of disadvantages.

The first and most obvious downside is that more drives are required - twice as many to be exact.  The second and biggest disadvantage to running a RAID 0 configuration is the risk involved. With RAID 0, if one of the two drives fails, the data is lost from both drives. This means that if one of the two 500GB drives goes bad, you lose your entire 1TB of data, regardless of if the other drive was in perfect working order. For this reason alone, many users choose to not use RAID 0.

For myself, I use three separate drives in my system. One drive contains my operating system and software. Another drive is used only for captured video and pre-rendered items. This is my “read” drive. The last drive is used only for rending projects. This is my “write” drive. This works quite well with only one drive being read from while another drive is only used to write files to. Although this configuration isn’t quite as fast as a RAID 0, I don’t have to worry about as many drives failing and losing more data.

Conclusion

I’m going to end this here since these are the most crucial components for any workstation. Although this blog is probably already outdated, I do think many of the concepts here still (and will continue to) hold true. I tried to keep this as objective as possible and for that reason I didn’t give too many specifics. With that in mind, feel free to use this as merely a guideline when building your next video editing workstation. Good luck and happy rendering!

P.S. For those of you wondering, these are the specs of my latest workstation.

Processor:     Intel Core i7 920
Memory:        6GB DDR3 1600mhz
Video:            Radeon HD 4830
Hard Drives:  1.5TB WD Black 7200rpm 32mb cache
Seagate 1TB 7200rpm 32Mb cache (x2)
O/S:               Windows 7 RC