Re: Issues with md raid 1 on kernel 6.18 after booting kernel 6.19rc1 once

在 2025/12/18 18:41, Bugreports61 写道:
> Hi,
> 
> 
> reading the threads it was now decided that only newly created arrays will 
> get the lbs adjustment and patches to make it work on older kernels will 
> not happen:
> 
> 
> How do i get back my md raid1 to a state which makes it usable again on 
> older kernels ?
> 
> Is it  safe to simply mdadm --create --assume-clean /dev/mdX /sdX /sdY on 
> kernel 6.18 to get the old superblock 1.2 information back without loosing 
> data ?
> 
> 
> My thx !
> 

In principle, this works but remains a high-risk operation. I still
recommend backporting this patch and add module parameters to mitigate the
risk.

https://lore.kernel.org/stable/[email protected]/T/#u

This issue will be fixed upstream soon. The patch is under validation and
expected to be submitted tomorrow. However, the existing impact cannot be
undone – apologies for this.

-- 
Thanks,
Nan