Posted 22 June 2007 - 07:10 AM
Data backup isn't talked about very much, until a loss is staring you in the face (I've got an 80gB paperweight on my desk to attest to this). Backup strategies are complex and require that the user make some sort of value judgment about their data (is it worth X dollars to save my data?). Not an easy thing, but a heck of a lot easier than a business.
On the flip side, restoration of the data is talked about even less - and it deserves to be addressed also.
So, the 2 questions that should be asked are:
1) How important is your data?
2) How quickly do you want it back?
Most folks will initially respond with their data is very important and they'll need it back immediately - but when the $'s start flying, the tone changes quickly.
First is the backup strategy:
- backup to same hard drive
- backup to local machine/device (including RAID)
- backup to local area network device
- backup to another location locally
- backup to another region of the country
- backup to another country
- backup to another hemisphere
This depends on how much you want to ensure your data's recovery - a natural disaster (such as a hurricane) can destroy the first 4 options above. The other options have similar scenarios that you can imagine. FWIW - my wife has decided that her business data is important enough to back up to our home (we live about 5 - 10 miles from the coast). If a hurricane destroys everything, the data will be the least of her worries. BUT, now that online data storage is becoming more affordable, we're looking at online data backup - both to simplify what we have to do, and to ensure that the data is out of the region.
Now, since this is a business computer system, my wife needs her data back immediately. So we've had to implement several solutions to ensure that this will happen. First is the daily backup - if they lose their data they'll spend the time to manually re-enter the data that's missing (for up to 12 hours worth of customers) More frequent backups aren't possible since the data files are being used constantly. We backup to:
- another hard drive on the same computer
- another computer on the LAN
- to our home
To further ensure the integrity of the data, we're also starting to look at online data backup (in conjunction with the home backup). And I'm looking at RAID 1 to ensure that they can recover quickly from a hard drive crash - but I'll also need another, identical system in the event that other portions of the system fail (we have one, I just have to "sync" them).
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able. - John
(my website: http://www.carrona.org/
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