Hi William, On 11/09/2011 12:12 PM, William Colls wrote: [...] > I thought, at the time, that I needed to do the create so that the /dev/md0 device would be created properly (new machine had no raid before). That's the "--auto" option, which has sane defaults. [...] > No output from the original setup. >From what you've described so far, a likely possibility is that the original raid 1 was using metadata version 1.1 or 1.2, which put the superblock near the beginning of the disks. The default "--create" metadata in that old version of mdadm is 0.9, as you can see in your reports. If so, you've likely only lost a tiny bit of data at the end of the volumes where the 0.90 superblock has been written. (I'm also going to assume that the two disks were in-sync in old box before you moved them, so the re-sync wouldn't do any harm.) A dump of the first 8K of your drives might be helpful here. dd if=/dev/sdb count=16 2>/dev/null |hexdump -C dd if=/dev/sdc count=16 2>/dev/null |hexdump -C Regards, Phil -- 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
