Computer backup- Somewhat off Topic

["Doug" <not@xxxxxxxx>]

I'm looking at the best way to maintain/back up my office computer which has
my alarm downloading and alarm management applications running on it, I
mention that so that the post won't be entirely off topic.

Anyway I have a RAID 1 (mirrored) with a pair of 500gb hard drives and a 2
port controller card by 3ware.

My thoughts are to either to have one of the drives of the array in a
removable tray and on a regular basis  remove this drive, probably once a
week, cycle another tray/drive into the array and then rebuild the array.
This should ensure that in the event of a virus or corruption of some sort,
I will only lose, at worst a weeks worth of data which I could live with.
Any failure of a single drive being taken care of by the RAID.

Alternatively I could have the two drives of the array permanently installed
and use a disk imaging back up, probably by Terrabyte, to image the array to
the third disk in the removable tray on a regular basis, again probably once
a week.

What are the advantages/disadvantages of either method

Doug

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