I echo the general consensus of the value of tape as a permanent archive mechanism.
We use SDLT which is similar in reliability and speed to LTO. The cartridges hold about 120-160 gigs of video data; there are newer SDLT drives that will write 300+ gigs/cartridge. The tapes aren't cheap, but sometimes you can find used-once tapes inexpensively, and used SDLT drives can be had on Ebay pretty inexpensively.
We also store the majority of our HD video data online using RAID-5 arrays. Personally, I don't feel comfortable with RAID-1 as it's basically mirroring, so if something gets written wrong to one drive (through a power failure, controller glitch, etc), the error will probably be perfectly mirrored to the other drive. RAID-5, on the other hand, can sustain complete failure of one drive in the array (3-5 drives, typically) and still not lose any data.
We use a fast hardware-based RAID solution in a custom-built Linux box, because we read and write directly to the array from editing stations on the network, but Buffalo has a pretty inexpensive RAID-5 storage solution that's not as fast , but at under $1000 for a couple terabytes of storage, it's a good deal.
We use SDLT which is similar in reliability and speed to LTO. The cartridges hold about 120-160 gigs of video data; there are newer SDLT drives that will write 300+ gigs/cartridge. The tapes aren't cheap, but sometimes you can find used-once tapes inexpensively, and used SDLT drives can be had on Ebay pretty inexpensively.
We also store the majority of our HD video data online using RAID-5 arrays. Personally, I don't feel comfortable with RAID-1 as it's basically mirroring, so if something gets written wrong to one drive (through a power failure, controller glitch, etc), the error will probably be perfectly mirrored to the other drive. RAID-5, on the other hand, can sustain complete failure of one drive in the array (3-5 drives, typically) and still not lose any data.
We use a fast hardware-based RAID solution in a custom-built Linux box, because we read and write directly to the array from editing stations on the network, but Buffalo has a pretty inexpensive RAID-5 storage solution that's not as fast , but at under $1000 for a couple terabytes of storage, it's a good deal.