Re: LBS setup

[Piergiorgio Sartor <piergiorgio.sartor@nexgo.de>]

Hi again,

not sure, but has anybody comments
on the topic?

Thanks,

bye,

pg

On Sun, May 24, 2026 at 12:27:27PM +0200, Piergiorgio Sartor wrote:
> Hi all,
> 
> I've some questions about some recent
> report from kernel.
> I assume from 7.x.y, from what I understood.
> Not sure about the <= 6.18 reported.
> 
> In the boot log there is:
> 
> md0: echo current LBS to md/logical_block_size to prevent data loss issues from LBS changes.
>       Note: After setting, array will not be assembled in old kernels (<= 6.18)
> 
> I found the docs stating:
> 
> logical_block_size
> 	... Write the value before starting array. ...
> 
> Now, should we really copy the value from:
> 
> /sys/class/block/md0/queue/logical_block_size
> 
> to:
> 
> /sys/class/block/md0/md/logical_block_size
> 
> ???
> 
> Note, the first in my system is 512, the
> second is 0.
> 
> Second, the docs says "before starting array".
> In case this is due (copy the value), how to do
> for a system array?
> I mean, the array where the whole OS lies.
> 
> If needed, is there any way to do this automatically?
> Using mdadm or something?
> 
> Thanks,
> 
> bye,
> 
> -- 
> 
> piergiorgio
> 

-- 

piergiorgio