Hi all, I made a simple boo boo which I hope the pros here can quickly guide me about. I have a near 2, 6 disk Raid 10 MD device (mdadm 3.1.4, Ubuntu ocelot 3.0.0.12) in which I marked two consecutive devices as failed and removed them (without bothering with that RAID10 can take failure only of non consecutive devices in near 2 configuration). When I re-added them they're showing as spares and the array is obviously not assembling..... I know the data is there and the disks are working reliably( I marked them as failed coz I wanted these two drives reconstructed ...bad idea ...and there are other ways of resyncing that I now know about) My questions: 1. I am guessing that I need to create the array with --assume-clean the knowledge of the order of the drives (4 are known, only the order of 2 spares is in question which I am also pretty confident about)?? 2. Documentation of assume-clean is quite sparse. Does it not write the superblock at all and only keep the details in memory? If so, how would I write the superblocks after verifying (read-only) that the array got recreated correctly? If it does write the superblock, ..wouldn't that destroy existing superblock in case I get the order/some other parameter wrong on the first go? I looked around on the list but couldn't get clear directions on the correct use of assume-clean for such a situation. I'm hoping that a thorough reply here could serve others looking for the same. Thanks and regards, Anshu -- 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
