Storage is always a problem!
I've got various hard disks in various machines that are all networked together (both Windows and FreeBSD), also DVD burners and a DDS-4 tape system.
If you want a fire safe (as I'm considering - more for the business data than the digital photographs, though the photos could usefully go in a fire safe as well), you really need a data grade one, which is much more expensive than a conventional fire safe. That's the only way that relatively fragile media such as DDS-4 are going to survive. However, you have to be a little careful with fire safes, in that if there's a serious fire, the building might collapse onto the safe making its retrieval awkward and its survival questionable.
One way around this is to duplicate media and store the duplicates off site, but where off site is another problem, especially as media left in a car probably won't survive that long (the temperatures inside a locked car can be troublesome). There are organisations that you can ship duplicate backup media to and get them to ship it back to you (either after a certain time for re-use, or on request), but the pricing of these services is probably out of all but businesses.
If you choose to take personal backup media to work, be careful that your employer's policies don't throw up problems by doing so - some employers may not be happy with data media being carried on and off their premises, and other employers may try to claim that your data is theirs if it's on their premises.
The question for now is how to make use of the storage I have. Probably the right way is to back up photos to DVD+RW as I go, leaving the data on my main hard disks where it will be backed up to tape until I've put it somewhere more secure than DVD+RW. DDS-4 is more a backup than an archival medium - retrieval is too awkward.
Long term storage is a different issue. Making use of a couple of DVD-Rs (ideally different brands) every time I generate 4GBytes or so of pictures is obvious - but I probably do need a large hard disk somewhere to keep an 'on line' copy of my pictures.
The one thing I won't be doing is buying a cartridge hard drive or similar proprietary system - as has already been said in the thread, such systems tend to be quite fragile and they do go obsolete after a while. Removable optical media tends to be more robust than removable magnetic, but as we all know, writeable CD and DVD (and even more so, rewriteable CD and DVD) media can fail.
One intriguing possibility for backup of working data is that DVD-RAM seems to be coming in from the cold a little. The generation of DVD drives that will arrive in the next couple of months includes a couple of models that will have 16x DVD-RAM capabilities.
DVD-RAM media tends to be much more expensive than DVD-RW or DVD+RW, but it doesn't require packet writing software and can be rewritten many more times. It can also run, albeit with a speed penalty, in a verify after write fashion.
David
.... he/she may be more understanding). The next month use a second drive to do the full backup on, take that to their house, bring the other one back and store it at home. This way you have one backup that is up to date and one almost up to date and the data is in 2 locations. In the event one is destroyed you don't lose everything. This isn't really that failsafe but the more complicated you make it for yourself the less likely you are to actually do it.

