Hi, I'm reading the source codes of RAID1. In file 'include/linux/raid/raid1.h', in struct raid1_private_data, there are these members: unsigned long start_active, start_ready, start_pending, start_future; int cnt_done, cnt_active, cnt_ready, cnt_pending, cnt_future; Could anybody tell me the meaning of 'active, ready, pending, future' and 'cnt_done'? Thanks a lot. Bin