Re: Starting and stopping RAID doesn't work from Cron

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On Tue, 2020-06-23 at 06:12 -0500, Roger Heflin wrote:
> How are you mounting the filesystem? (I don't remember details from
> 
> the prior discussion)  Directly with /dev/mdXXX or are you using some
> other link?  If you are using some other link then udev needs time to
> get the original mdXXX creation event and then create other links
> pointing to mdXXX.
> 
> 
> 

As I said earlier, it's being mounted via /etc/fstab thus:

UUID=6cb66da2-147a-4f3c-a513-36f6164ab581       /raid                   ext4    rw,noauto,user  1 1

where the script does:

                up)     mounted && exit 0
                        echo "- - -" > $SCAN
                        echo -n "raid attempt: " >> $LOG
                        for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do        # Wait up to 30 seconds
                                sleep 2
                                echo -n $i " " >> $LOG
                                raidon && break
                        done
                        raidon || (echo -n " failed:"; date; exit 2)            # RAID timed out
                        (echo; echo -n "up:   "; date) >> $LOG
                        mount /raid > /dev/null 2>&1
                        mounted || (echo "mount failed"; exit 3)                # Mount failed

and 'raidon' is defined as:

function raidon() {     # RAID drive is running
        if mdadm --query $RAID > /dev/null 2>&1 ; then
                return 0
        fi
        return 1
}

I'm assuming that once mdadm returns 0 the array is up and running. If
that's not the case, then it would explain the issue.

As can be seen, it's also doing a lot of logging. I can change it to
run everything as a single script, but I don't really see what
difference it will make. I'll report back on the results.

poc
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