Grub warning on setting tunable; does it matter?

[rogerh]

I wanted to set a boot parameter via the GUI as follows:

hint.ata.0.dev0.mode="PIO4"

I enabled this and, as it was being saved, I got the following log message:

Code:

[root@mojave ~]# bzcat /var/log/messages.0.bz2 | grep -A 3  grub              
Dec 11 23:26:33 mojave notifier: Generating grub configuration file ...       
Dec 11 23:26:33 mojave notifier: Warning: Requested serial terminal but GRUB_SERIAL_COMMAND is unspecified. Default parameters will be used.                  
Dec 11 23:26:38 mojave notifier: done  

However, the tunable seems to have worked because the previous dmesg output of:

ada4: 150.000MB/s transfers (SATA, UDMA6, PIO 8192bytes)

then becomes:

ada4: 150.000MB/s transfers (SATA, PIO4, PIO 8192bytes)


I don't know if this is just Grub being a little anxious and indecisive before doing the right thing. It is just disconcerting getting warnings. Does anyone think it matters?

 

[rogerh]

I guess it's not important then! Seems to be to do with grub configuration and not particularly my additions. I think I'll ignore it.