Re: Some troubles with grub with buster point release 10.8

[Carsten Aulbert]

Hi

On 10.02.21 19:59, Thomas Lange wrote:

I think we want to match all real disks which can be identified by a
name, model, serial number. Maybe also virtualized disks which have
such an entry at by-id.

Would something like a "choice-priority" function fly instead?



get_stable_devname() {
    _DEV="$1"


    RET=""
    for i in $(udevadm info -r --query=symlink "$_DEV")
    do
        if [[ "$i" =~ /by-id/scsi && -z "$RET" ]]
        then
            RET="$i"
        elif [[ "$i" =~ /by-id/ata && -z "$RET" ]]
        then
            RET="$i"
        elif [[ "$i" =~ /by-id/wwn && -z "$RET" ]]
        then
            RET="$i"
        elif [[ "$i" =~ /by-path/ && -z "$RET" ]]
        then
            RET="$i"
        fi
    done

    echo "$RET"
}

get_stable_devname /dev/sda

(or am I missing the point)?

Cheers

Carsten
--
Dr. Carsten Aulbert, Max Planck Institute for Gravitational Physics,
Callinstraße 38, 30167 Hannover, Germany, Phone +49 511 762 17185

given that the `ata` bits came from my initial script and the fact that we mostly have SATA drives in our machines, I feel a bit of guilty ;-) I assume udevadm would return any of the valid device links and by-path is always set, thus: # prefer SCSI over ATA over WWN over path

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