WD green drives are going to 4096 byte (4k) disk blocks, from the previous almost exclusive 512 bytes, to make numerous improvements, mostly in capacity and speed.
There's an article running on /. right now about how everyone but unix is ready for this, and specifically mentions problems with fsck and severe performance hits when block reads don't align with the new disk blocks.
Seeing as how OS X is unix-based, where does Snow Leopard sit with these new drives? I'm interested not only in basic compatibility, but also what accessories like diskutil and fsck may break, as well as what performance we should expect?
One other gorey detail the thread goes into is questioning what happens to performance when the start of a partition is not aligned with a disk block. (apparently having consequences in calculating where every other data block in the partition is)
