On 14/09/2020 06:38, Xiao Ni wrote:

If /etc/hostname is empty and the hostname is decided by DHCP. There is a risk that the raid
device can't be active after boot. Maybe the network starts after storage. The system can

          ^^^^^

I think you mean "won't" - "the raid device will not be active after boot".

This is a nasty corner case in English Grammar - one verb is "I can, you 
will, he will", the other is "I will, you can, he can" !?!?!?

If you mean it is possible that the array will not be there after boot, 
but that the user can just start it manually (ie there's no real problem 
with it), then it's "the raid device won't be active ..."

Cheers,
Wol