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RAID 0 - you will get performance increase but if any of the drives dies, all the data is gone; make sure you have backups.
RAID 1 - you will have data mirrored from drive 1, to drive 2. If one drive dies you will still have your data; make sure you have backups regardless as arrays do fail and you can lose all data anyways.
No RAID - you would have to create nightly backups to the 2nd drive via rsync, or just use the 2nd drive for additional storage since you will still have off-server backups
I would pick #2, and make sure I had off-server backups.
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Even though your new host may be unmanaged (if thats the case) they should've been able to explain and help you with this.
Perhaps you should reconsider the choice on provider.
I can offer SAS drives, in 4 bay hot-swap config with all manner of Xeon CPU's, including the very latest Harpertown with 12MB cache!
alex [removethis@] pacificrack.com
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