When Microsoft announced that drive extender was being stripped out of the final version of its new Windows Home Server line, the full wrath of the Internet literally fell upon them. The comments on the on the announcement were less than kind, and even though they had a workaround of sorts to keep your data duplicated, nothing really matched the allure of a single protected pool of storage.
For those unfamiliar with it the concept, drive extender is fairly simple to understand. Take any number of disks, add them to a storage pool, and files copied to it can optionally be duplicated across multiple disks to safe guard against individual failure and are presented as one large volume to the user. Fast forward to 2012 and they are ready to make amends by bringing the feature back, however this time they are going to reach a much wider audience by packing it in with Windows 8.