On 09/29/2017 03:50 PM, Roman Mamedov wrote: > On Fri, 29 Sep 2017 10:53:57 -0400 > Eli Ben-Shoshan <eli@xxxxxxxxxxxxxx> wrote: > >> I am just hoping that there might be a way that I can get the >> data back. > > In theory what you did was cut the array size to only use 9 KB of each device, > then reshaped THAT tiny array from 8 to 9 devices, with the rest left > completely untouched. > > So you could try removing the "new" disk, then try --create --assume-clean > with old devices only and --raid-devices=8. > > But I'm not sure how you would get the device order right. > > Ideally what you can hope for, is you would get the bulk of array data intact, > only with the first 9 KB of each device *(8-2), so about the first 54 KB of > data on the md array, corrupted and unusable. It is likely the LVM and > filesystem tools will not recognize anything due to that, so you will need to > use some data recovery software to look for and save the data. > I agree with Roman. Most of your array should be still on the 8-disk layout. But you were mounted and had writing processes immediately after the broken grow, so there's probably other corruption due to writes on the 9-disk pattern in the 8 disks. Roman's suggestion is the best plan, but even after restoring LVM, expect breakage all over. Use overlays. 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
