reconstruction finished earlier today: md2 : active raid10 sdc5[2] sdd5[0] sda5[4] sdb5[1]15567237120 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]
bitmap: 1/116 pages [4KB], 65536KB chunkSo, functionally, raid reconstruction worked properly - just the reporting of the estimated time and speed were off - and I think the estimated time is calculated based on the speed and size left.
