Hello Neil. I have a RAID1 built using v1.2 superblocks. I seem to not be able to hot add a spare drive to this array. I get the error message: "HOT_ADD may only be used with version-0 superblocks" Does this really mean that hot add is not supported for arrays built with v1.x superblocks? If so this seems like a big regression in functionality. In this case, are there technical reasons why v1.x cannot support hot add? I am using a stock 2.6.18 kernel with mdadm v2.5.4 Thanks, Sean __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - 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