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For small arrays the "Rebuild(20|40|60|80) ..." progress indicators are not generated. We have seen some of those messages missing. For sure the RebuildStart message was missing on blav2 for
Sometimes mismatches are reported according . According to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=518834#38, that is a problem for RAID 5 but not for RAID 1. Presumably , by extension it is a problem for RAID 6 too.
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