Comment The El Cheapo solution (Score 1) 47
If these are hot-swappable drives in cages, then a cardboard box or a milk crate in a cool dry environment should be adequate. You want to avoid dust, so make sure the box or crate is covered. Putting them in a lockable filing cabinet would be a good idea.
I haven't seen any IKEA-esque prefab shelving meant for HD cages. Of course, if you have the budget for it, many custom furniture contractors will build you a filing cabinet with shelves or pigeon holes that fit the dimensions of the HD cages. Not too expensive.
If the drives are not in hot-swap cages, then store them in the anti-static bags they came in. If you can afford USB/Firewire enclosures, there are stackable single-HD enclosures and multi-HD enclosures. You'll want to spin the drives up once every few months, so an enclosure is better than anti-static bags.
Either way, just remember to label all the drives. It's no fun hunting through 50 unlabelled HDs for a particular file.
I haven't seen any IKEA-esque prefab shelving meant for HD cages. Of course, if you have the budget for it, many custom furniture contractors will build you a filing cabinet with shelves or pigeon holes that fit the dimensions of the HD cages. Not too expensive.
If the drives are not in hot-swap cages, then store them in the anti-static bags they came in. If you can afford USB/Firewire enclosures, there are stackable single-HD enclosures and multi-HD enclosures. You'll want to spin the drives up once every few months, so an enclosure is better than anti-static bags.
Either way, just remember to label all the drives. It's no fun hunting through 50 unlabelled HDs for a particular file.