Hi Ivan, On 03/15/2013 12:29 PM, Benjamin ESTRABAUD wrote: [trim /] > The fact that you have the position of all the other drives from the > array is good. Now we want the last drive's superblock to be written. > Since we know the position of all the drives, and assuming you know the > *exact* arguments passed to mdadm when you first created your raid0 > (correct metadata version, chunk size, etc. (most can be found in the > existing superblocks), you could call "mdadm --create " with the same > version of mdadm and MD used when creating the array initially, the same > options and arguments, and *very important* the drives in the same > order, which I believe to be: /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1 > (according to the info above). > > This will create a new array, but since you are recreating the same > *exact* array, the existing data should be there and available untouched. This is all correct, and is the correct next step. > However, as a word of warning, many things can go wrong this this > command: If you were to recreate the array slightly differently and > start overwriting your array you would destroy the data on it. The fact > that it is a RAID0 is good since creating a new array won't start a > resync that could be fatal should you have made a mistake providing the > arguments for the recreation. So the above should be generally safe, > provided you keep a copy of the information you gave us above and match > the "create" arguments perfectly. You can check your work by re-issuing the "mdadm -E" commands after re-creating the array. The data offset and chunk size must match the originals. If they do, then you can mount the filesystem. 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
