Hello, I just noticed that I somehow overlooked that md3 and md7 on that old ubuntu system *did* have a write-intent bitmap. So in my tests action="spare" does not seem to allow automatic re-sync of arrays without a bitmap. To quote the man page again on "spare": "if the device is bare it can become a spare if there is any array that it is a candidate for based on domains and metadata." I am fankly not sure I fully understand that. A bare device has no superblock, so does mdadm only look which array fits onto the device? Since the partitions on the removed disk contain superblocks they are not bare, may that by why action=spare does not apply, and an automatic re-sync may either require a new action="re-sync" or be done by "re-add" as well? Regards, Chris -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
