In brief: Lion won't let me log in until ALL attached disks are spun up. Is Lion different in this regard? In Snow Leopard, I don't remember spinning beachball waiting for external disks to spin up at login time. Some start-on-login apps might wait a bit for the disks, but there was no hang in the login screen waiting for the disks. I wouldn't mind this so much if I understood what Lion was doing here. What data is it loading from my Time Machine and Video Vault storage disks at login? I think this may be a bit more noticeable for me, because of my two RAID enclosures; one takes about 20 seconds to spin its 4 disks up in sequence, the other another 10 seconds for its 2 disks... Spidey!!!