On Sun, 22 Sep 2019 23:40:51 +0100, Mark Fletcher wrote: > Hello > > While setting up a newly purchased RAID-capable hard disk cage I've > damaged the contents of 2 hard disks and want to know if it is possible > to recover. > > The cage has 5 disk slots each occupied by 3TB hard disks. 4 of the > disks came from an older cage by the same maker (TerraMaster, in case it > matters) and one is new. > > In the old configuration I had 2 disks in a RAID 1 configuration and 2 > as single disks. I transferred over the 4 disks from the old cage and > added a new disk in the 5th slot. > > The new cage is RAID 1 capable in its first two slots and the remaining > three are single disks. > > You've probably guessed what I did by now. I put the two single disks > from the old cage into the first two slots of the cage and enabled RAID. > I should have put the two disks that were RAID in the old cage in those > slots. > > I realised almost immediately what I had done and swapped the disks > around into the correct configuration. My originally-RAID pair are now > correctly in the first two slots with RAID enabled and are none the > worse for the experience of having briefly having been in the single > slots. Unfortunately my two originally-single disks are showing up as > having no partitions according to lsblk. > > There was data on those disks that I would ideally like to get back. Do > I have any hope of undoing whatever damage was done to the disks when > the cage was switched to RAID mode? I did not write any data to them, > and crucially I did NOT create a new file system on the disks after > turning on RAID in the cage before realising what I had done. > > A search turned up the gpart program but it looks ancient -- could it > still help me? gparted may also help but most online info about it is > about repartitioning disks to prepare for a dual-boot install, not about > recovering a messed-up partition table (which is what I assume I am > dealing with here). > > The disks were originally formatted ext4 with a single partition taking > the whole of the disk. Since no file system was created on them and no > data was written to them while they were in the RAID slots of the cage, > I'm hoping I can repair things, but looking for ideas of where to start. > > Thanks in advance and in hope > > Mark > > PS Running buster if that's important
Posible Options: 1. if you use lilo, look for a copy of parttions table. 2. create the parttion exactly as it was.
