Cooling is a really important issue…. I’ve been working in a Data Center for years and I can tell you of numerous mistakes recently… here is what I suggest:
1. When purchasing A/C units, make sure you have enough to cover the additional heat load you will have in the future. Make sure you purchase redundent units because one will fail in the future.
2. If the floor is raised, make sure it’s raised high enough for proper air flow with all the cables to plan to run under. You should have one unit to blow under and unit to bring air down from the ceiling.
3. Have hot and cold isles with preforated tiles in the front and solid tiles in the back but make sure you do not install your A/C units where hot air for the server racks will be blowing on them.
Another really good idea in a Data Center is to label everything… especially both ends of all cables so you won’t need to trace them. If using a raised floor you should generate a map of all the electrical connections so you don’t have to pull all the tiles up looking for them in the future.
Have generators ready to back up your UPS units.
I’m sure people will add plenty more tips for you.
* as mentioned above temperature is a vital factor for a Data Center since most of the new server will automatically gets shutdown when it meets the maximum Temp threshold. Same time backup power systems apart from UPS power like Row power and Generator should be in place.
* you have to keep Fire Extinguishers in place and should match the requirements.
* you have to mark the way points clearly on the raised floor. it helps for users find the way out if there is a fetal power failure.
* Need to mention useful phone numbers of Authoritative users inside the Data center.
* As a Practice Avoid vendors to take Pen drives, DCs, Camera Phones.
* Avoid use of users own shoes inside the DC and provide separate sets of Shoes.