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    A New Chapter for MagicMirror: The Community Takes the Lead
    Read the statement by Michael Teeuw here.

    Everything was going so well

    Scheduled Pinned Locked Moved Unsolved Troubleshooting
    52 Posts 4 Posters 18.1k Views 3 Watching
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    • J Offline
      JMac @sdetweil
      last edited by

      @sdetweil so do I run e2fsck -f -v /dev/sda1 or e2fsck -f -v /dev/sda2
      or does it not matter?

      I’m struggling here to the bigger picture so can’t see the logic of the steps.

      S 1 Reply Last reply Reply Quote 0
      • S Do not disturb
        sdetweil @JMac
        last edited by

        @JMac ok bigger picture, in Linux

        hardware devices are named. see the output of ls /dev

        disk devices are usually named sd??? where xxx is a letter, and partition number
        letter a is the first device b the second etc

        sometime in the past the type of storage device was also used as part of the name, scsi, atapi …
        for this case they are named sd (storage device)

        sda is the first storage device
        sda1 is the first partition on the sda device

        on those partitions are a logical way of storing data. most linux and all windows devices store file data in sectors, 512 byte chunks called sectors. and then the file system (way of organizing those sectors)
        applies some data structure on top. it’s a directory or a file. tables in other sectors build trees of data to describe the entire partition.

        there are different layouts depending on vendor and intended use
        FAT, exFAT, NTFS EXT3, EXT4, and a host of others.

        all is wonderful until some sector or more gets damaged… machine was powered off during write, a hardware failure…

        now the filesystem code is confused… says read sector 853, and the bits there will tell it where the next sector is for this file. but the bits don’t point to the right place… Oops

        some file systems include a duplicate set of bits do there is an alternative way . some use them only for recovery.

        sd card hardware is known for being fragile. it was designed for lots of reads,with few writes. camera picture music file. NOT an os that is waiting logs and other stuff constantly.

        anyhow.
        to check and correct these kinds of problems with the Linux ext file system we need to run thr fsck program on the raw partition. and make sure that moone else is using it.

        unmount takes it out of circulation. no users files open

        fsck and e2fsck need to read the raw sectors on the partition, but we just unmounted it.
        so we need to provide the hardware name for the program to use.

        Sam

        How to add modules

        learning how to use browser developers window for css changes

        J 1 Reply Last reply Reply Quote 0
        • J Offline
          JMac @sdetweil
          last edited by

          @sdetweil Wow, that was a bit to take in but makes sense (I think).

          So if I unmount it how do I get the information off it?
          what are the steps here?

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          • S Do not disturb
            sdetweil @JMac
            last edited by sdetweil

            @JMac
            unmount it
            run fsck against it
            remount it (hopefully fixed)

            then copy your data first thing, DO NOT WRITE TO THE SD CARD

            config.js
            custom.css
            and a list of all the modules in modules (ls *)

            if u WANT to try in each module folder do

            git remote -v
            ```⁷
            so we know where it came from
            
            quickest way in each module folder
            
            git remote -v | tail -a ~/module_list 
            
            this will list to github source (git remote -v) and append that info  (tail -a) to a known file in your home folder (~ = home)
            
            this is what my backup script does
            IF you have any modules that require authentication (run an auth script) 
            ls *.json while you are there,
            
            you could also run my backup script, from the web page copy/paste  with -s  pointing to the mounted folder MagicMirror 
            https://github.com/sdetweil/MagicMirror-backup-restore
            
            ...MM_backup -s /media/??????/MagicMirror some gobbleygoop name (tab key will fill it in after the 1st letter)
            
            this will create the MM_backup folder in your logged on user home folder..  
            and do all the work described above (after the mount)
            https://github.com/sdetweil/MagicMirror-backup-restore

            Sam

            How to add modules

            learning how to use browser developers window for css changes

            1 Reply Last reply Reply Quote 0
            • J Offline
              JMac
              last edited by

              had a little crack at this again, the Mrs is bugging me to get “her” mirror back up and running.

              So I’ve run sudo umount /dev/sda1
              sudo umount /dev/sda2

              Both drive folders from the mounted (old) SD disappeared from the home screen on the pi as expected.

              then run, (and got)
              sudo e2fsck -f -v /dev/sda2
              e2fsck 1.46.2 (28-feb-2021)
              rootfs: recovering journal
              superblock needs_recovery flag is clear but journal has data.
              Run journal anyway ? YES
              e2fsck: unable to set superblock flags on rootfs

              rootfs: *********** WARNING: filesytem still has errors *********

              S 1 Reply Last reply Reply Quote 0
              • S Do not disturb
                sdetweil @JMac
                last edited by

                @JMac bummer

                from search
                https://unix.stackexchange.com/questions/327863/fsck-wont-fsck-unable-to-set-superblock-flags/386886#386886

                was the card readable at all? if so
                take it out and put it back in to get mounted
                and copy the old config.js, custom.css and do

                ls >~/savedlist.txt

                in the MagicMirror/modules folder
                to some file on your booted card

                then we can help you rebuild a new sd card

                Sam

                How to add modules

                learning how to use browser developers window for css changes

                J 2 Replies Last reply Reply Quote 0
                • J Offline
                  JMac @sdetweil
                  last edited by

                  @sdetweil hey Sam, I can still see the old list of modules on the old SD card.

                  If that’s the case can the old card still be used?

                  the new card is just a completely empty Pi OS, nothing to do with MM on there yet.

                  Do I need in run the basic install for MM on the new SD to get that running?

                  S 1 Reply Last reply Reply Quote 0
                  • S Do not disturb
                    sdetweil @JMac
                    last edited by

                    @JMac yes, you need to install MM on the new sd.

                    use my script…
                    see https://github.com/sdetweil/MagicMirror_scripts
                    but you should extract your MM config from the sd card.

                    use my backup script to point to the mounted sd card
                    see https://github.com/sdetweil/MagicMirror-backup-restore

                    then install MM
                    and then restore the config saved to the new sdcard (~/MM_backup folder)

                    Sam

                    How to add modules

                    learning how to use browser developers window for css changes

                    J 1 Reply Last reply Reply Quote 0
                    • J Offline
                      JMac @sdetweil
                      last edited by

                      @sdetweil So install the base of MM on the new SD then follow the steps in your previous post?

                      I have a feeling it definitely won’t be that easy.

                      S 1 Reply Last reply Reply Quote 0
                      • S Do not disturb
                        sdetweil @JMac
                        last edited by

                        @JMac back is copy/paste from the github, add -s/media/{user}/mountname/MagicMirror

                        then install MagicMirror
                        copy/paste from the github link

                        then restore, copy/paste from the github link. no parms required

                        Sam

                        How to add modules

                        learning how to use browser developers window for css changes

                        1 Reply Last reply Reply Quote 0
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