After the recent power outage, my raid disks on my Linux box felt the need to rebuild. It’s currently at about five days:

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md2 : active raid1 md1[1] md0[0] 107467072 blocks [2/2] [UU] [>....................] resync = 2.1% (2323636/107467072) finish=6876.4min speed=252K/sec You have: 6876.4min You want: days * 4.7752778

Ouch - looks like it’s going well, though - I love raid!