No other driver than dm-raid1 has problems with this and they wouldn't damp performance because of one driver.
--- so I found that md-raid-[156] recently (2.6.13 or so) added a bitmap mode and when this is used (argument --bitmap to mdadm), it is vulnerable to this desynchronization bug too. Before, it synced the whole device when it crashed without shutdown, so it was OK.
Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
