However, I have been thinking for a long time about getting a separate drive probably not USB unless I get something better than the two I had before that both crashed just for backups. The idea of being able to restore my entire system is more appealing than having to do reformats and reinstalls several times a year.
The point is preservation of working system information over its useful lifetime, and the main principal here is redundancy. To reduce the risk of data loss via disk failure and other causes and the added work and lost time of reconstituting a failed system, one always keeps recoverable system information and particularly the unique data in two or more independent locations - e.
That way, if one fails, the information exists or can be retrieved from the other while the failure is corrected. Risk is always a matter of degree and the tradeoffs involved. Even DVDs are not risk free. Unless something of a general castrophy happens, there's little chance that two independent hard drives much less three or more will fail at the same time, thus allowing the failed drive to be replaced and reconstituted while the information remains recoverable on the other s DVDs may be less physically failure-prone than spinning hard drives, but the tradeoff costs are the significant extra time and a relentlessly increasing inventory of old backup disks that you may not want to release to the general public.
Have you ever tried to dispose of three years worth of old backup CDs? DVDs are more suited for mid-to-long term data archiving, as opposed to shorter term backing-up requirements. I keep only two weeks of running Ghost recovery point sets at any time.
With hard drives becoming progressively less expensive and more reliable per Byte stored, it really pays to play the real-time redundancy game with fast multiple independent hard drives for the short term backup requirements. I know about three or more years of disposing of CDs. I did that a few years ago and rebacking up the information to DVDs was a monumental project.
I have three external USB drives on three systems. From time to time I switch them so that I can keep a full backup of each system on each of them. All of that may not be necessary but I have had crashes, at the worst possible moment, and I've learned that I've never had too many backups or been too safe when it comes to keeping duplicate copies of very important data.
I agree about having multiple backup locations. Our household uses laptops with limited drive space on each and I've had three catastrophic external USB drive failures in the last year. This seems really high to me. At first I thought it was a Vista issue since the problem has only occured when using a Vista laptop. But I'm not really sure of the cause.
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