Is their any method of grouping the spinup / spindown state of a group of hardisks for use with an LVM ? I'd like all the harddisks to spinup when the LVM is used to prevent pauses (this LVM is used with XFS for video streaming).

The only method i can think of is using cron and hdparm to check the disk state and alter it accordingly, but that seems like quiet a lot of overhead. Has anyone got a better solution.