When it comes to choosing network storage there are more options than I really care to consider before purchasing. It can be a huge investment however and I can personally recommend it as essential to anyone who stores a large number of images.
Compared to storing images on a USB drive connected directly to your computer, network storage allows you a range of additional facilities such as automated backup, shadow copying (automatically making multiple copies of the same file for backup purposes) and remote access, all without taking up resources on your computer.
In a medium to large scale enterprise storage system there are a huge number of factors to consider, especially cost. Some of these storage units can be £15-£20,000 each and that's before you add any hard drives. These units are simply controllers, dedicated computers designed to access huge volumes of data quickly and efficiently.
For the home office user, semi-pro or low budget pro there is a superb range of new options in terms of desktop storage. For my own particular needs I needed a low cost archival solution. This is for images that don't need accessed too often or too quickly. I don't need to spend a fortune on a system with multiple points of network connection to handle large loads, i.e. hundreds of users accessing the same images at the same time. I simply wanted disk space, and lots of it. I also have a rack unit (a box or tower designed to hold computers and other peripherals built in such a way that they take up small amounts of vertical space, such as the unit pictured above) so a rack mounted version was also required.
In 2007 NetGear released their ReadyNas units, cheap, Linux based machines designed specifically to give you storage space. Don't panic though, you don't have to understand or even use Linux to consider one of these units. Kepping Linux as their operating system NetGear have built a computer that has four slots for four hard drives in the front and a row of lights, one for each hard drive plus some more to show the status of the entire unit.
On the back is cooling fans, USB slots and network ports.
Despite the Linux basis Windows can see the files via My Network. In server editions of Windows you can point drives names to the ReadyNas units using Distributed File System but they can't be replicated automatically.
Out of the box you simply slide the unit into your rack (the desktop version simply sits on your desk) and you plug it into your network.
Add a keyboard and mouse (USB) and monitor (VGA) to the slots on the back and you're ready to go. Alternatively you can install the RAIDar software included in the box and access the unit remotely right away. Logging in using the default username and password you're presented with a wizard for setup. Beyond the wizards which setup just about everything for you the interface is very simple. It looks like a webpage and has every setup option you need including built-in backup options for adding an external USB drive. Note, you can't install additional software on these units so if your backup software requires a client version on the target drive you won't be able to use it. Instead you will have to rely on the backup options built into the ReadyNas control panel. If you use CA Arc Serve you will be able to target the drives for backing up without installing the Linux clients, saving you some licensing costs.
The early version of this interface had a few bugs, some of which requried a complete format and rebuild but the new versions of the software that have been released have cured all of these so far. The later units also have slightly improved interfaces and are faster to use.
I currently run 3 of these units, each differing slightly as time progressed but all updated to the latest version of software. Software updates are managed by the interface and downloaded directly to the unit making upgrades easy with little down time.
Access to the units is handled via 'RAIDar', a small software scanner which looks for ReadyNas units on your network and displays their current status and software version. From this software you can then enter the individual management console of the unit you want to work on.
A range of RAID options are available giving you peace of mind if you have the budget for the loss of storage. In a 2TB unit you'll actually get 1.33TB with RAID 5.
4TB units are now available and given the reduced costs of hard drives these are excellent low cost units for large storage volumes.
It is easy to fall into the trap of buying large scale storage and putting all of your images into it but don't forget to use these machines as second copies or easy access copies of your images.
Either buy two units and keep replica copies on each machine or go for tape backup. If you value your images, tape backup is expensive to setup but cheap to run. Once it's running a copy on tape and a copy on disk will give you peace of mind and fast access.
In the ideal solution you want a third copy, either a second tape or second disk. If recovery time is a major factor then a second disk is always faster than recovering from tape.
It's worth noting that the ReadyNas units have hot swappable disks and good tech support although phone queue times can be a little long.
Ultimately these units are easy to setup and use. They're not the fastest units for disk access but they're superb value for money if you need large storage quickly without requiring a degree in disk management.








