>>>>> "Moritz" == Moritz Rosin <moritz.rosin@xxxxxxxxxxxx> writes: > Hey there, > unfortunately I have to admit, that I learned my lesson the hard way > dealing with software raids. > I had a raid1 running reliable over month using two 4TB HDDs. > Since I ran short on free space I tried to convert the raid1 to a raid5 > in-place (with the plan to add the 3rd HDD after converting). > That's where my incredibly stupid mistake kicked in. > I followed an internet tutorial that told me to do: > mdadm --create /dev/md0 --level=5 --raid-devices=2 /dev/sdX1 /dev/sdY1 Please share the link to the tutorial so we can maybe shame that person into fixing it. Or removing it. > I learned that I re-created a raid5 array instead of converting the > raid1 :-( Yeah, I think you're out of luck here. What kind of filesystem did you have on your setup? Were you using MD -> LVM -> filesystem stack? Or just a raw filesystem on top of the /dev/md? device? > Is there any chance to un-do the conversion or restore the data? > Has the process of creation really overwritten data or is there > anythins left on the disk itself that can be rescued? If you have any information on your setup before you did this, then you might be ok, but honestly, I think you're toast. John
