There are quite a few posts on this subject and it is a complex area. If you want a concise explanation of DAS/SAN/NAS in video form - I have posted "Networked Storage Made Simple" on YouTube.
YouTube - Networked Storage Made Simple
This explains the differences at a high level and also provides some advice on ways to approach choosing the right solution for you.
Ultimately, when buying storage, you need to get it sized/ specced correctly for your particular needs which means talking to vendors. Just don't get caught up in the "bells and whistles" they offer - get the basics right first.
that was actually very good thanks for that
Thanks Simon, whilst it did not provide me with much that I did not already know it made the whole area very easy to understand - I shall be using it to introduce to introduce my head teacher to the ideas of San and Nas.
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