erase former ceph disks

[DrillSgtErnst]

Hi,
my old cluster had problems, I had to reinstall
Now PVE marks all the SSDs as LVM.
I cant delete via fdisk.

The old LVM2_member signature will be removed by a write command.

I can't delete partitions, as there are no created.
I can write an gpt label but usage still keeps Device Mapper.

How do I clean the disks?
I already tried with Microsoft diskpart
cleaned the disk 4 were clean after that
8 remain LVM

I am trying shred now.

Gonna keep you updated

 

[sc3705]

I'm in a rush at the moment so I can't look it up, but there is a command to remove LVM members. I think it's "lmremove <lvm member>". I vaguely remember having to do this on one of my dev machines when I was playing around with Ceph.

If my memory isn't failing me; i had to issue the command to destroy the OSD(The one with the funky parameter; i-want-it-gone... something hilarious like that. Then issue the command to remove LVM. The LVM command, I don't think is needed. I was creating pools and blowing them away in DEV when suddenly the disks stopped showing up as an option. I think this is how I got them back. There's still a lot for you to google but hope this help, if I wasn't late I'd look up the commands.

 

[sc3705]

wow, I took 5 steps away from the computer and remembered the command, I had to come back.

it's "lvremove <LVM member>". The member starts with "ceph-".

 

[sc3705]

Also, if it's the last disk it won't remove. IDK how to get past that.

 

[DrillSgtErnst]

Thanks for that reply.

I will try that.
problem is, that I don't use Ceph at the moment. Therefore I can't destroy the OSDs the common way.


But I know what you meant it was something like ceph destroy osd osd,name --yes-I-really-mean-it..

Thanks