check those posts.
http://forums.contribs.org/index.php?topic=39046.0http://forums.contribs.org/index.php?topic=38981.0talking about finding an easy solution to backup on SME. To sum it up, as far as i've search, usb hard drive are the less expensive solutions. i just received this system
http://www.materiel.net/ctl/Boitiers_externes/32383-MB_663UR_1S.html with a samsung 2.5" drive. It seems to be an affordable and easy system. For the moment i'm testing it on windows as i feel more confortable with it, but if it pass the test then i'll buy 5 for my sme server.
basically you shoud install a kind of usb system like this on your sme server, then using first
http://distro.ibiblio.org/pub/linux/distributions/smeserver/contribs/jppialasse/SME7/usbdisksmanager/ unnilever distribution in order to always automount in the same place your drive each time you plug them in. Don't forget that you'll have 2+ HD that you will always expect to be mounted in /backup for example.
Then you can use affa or backuppc as you feel (it depends on your needs. Don't forget to add a script to be run before launching the backup that is checking that a usb drive is effectively mounted, otherwise, it will backup all your files in /backup that will then become a folder on your server (not really secure to backup on the same place). If yes it will backup, then unmount (post scripted). If no then it should send a mail to remember the admin to bring the usb drive!.
I prefer the icydock system in comparison to normal external usb hard drives, because it's easy to get it out of the place. there are also sata systems that looks the same (vantec EZ swap EX, icybox IB-266StUSDB, silverstonetek MS05) but sata hot swap capabilities are not really clear (need bios+software activation in some cases and could in some other case destroy your motherboard). USB is natively hotswappable and usb2 is not that bad.
You got professional cartdridge as rdx, Govault, odyssey that are basically based on the same harddrive (2.5" hard drives). The system is certainly more secure and robust, it works with most of the linux/Windows backup software, but cartridge price are the double of what you could get with a system like i described. rdx is the cheaper of the 3 as i remember, but a 120Go cartridge is 140€ as with my solution i get a 120Go solution for 70€.
I'm sure in two or three year we could also integrate SSD if their MTBF and size capacity are bigger.
hope this helps.
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