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    DiskDump to a smaller USB

    Scheduled Pinned Locked Moved IT Discussion
    diskdumpusb cloningsmaller
    43 Posts 7 Posters 5.3k Views
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    • DustinB3403D
      DustinB3403 @Dashrender
      last edited by

      @Dashrender well Clonezilla didn't.

      Lubuntu in a live cd does.

      1 Reply Last reply Reply Quote 0
      • MattSpellerM
        MattSpeller @DustinB3403
        last edited by

        @DustinB3403 dd an img of it onto something else, then have at it

        DustinB3403D 1 Reply Last reply Reply Quote 0
        • DustinB3403D
          DustinB3403 @MattSpeller
          last edited by

          @MattSpeller How?

          I have never used dd

          MattSpellerM 1 Reply Last reply Reply Quote 0
          • MattSpellerM
            MattSpeller @DustinB3403
            last edited by

            @DustinB3403 oh!! you're in for a treat!

            It's practically the only linux thing I know how to do because it's damn useful

            Let me find a guide here....

            1 Reply Last reply Reply Quote 2
            • DustinB3403D
              DustinB3403
              last edited by

              So /dev/sdd has

              sdd1 etc3 4GB
              sdd2 fat32 4gb
              sdd3 lvm2 pv 21.82GB

              MattSpellerM 1 Reply Last reply Reply Quote 0
              • DustinB3403D
                DustinB3403
                last edited by

                Now I very well might need to restart the setup if in fact this USB is using almost 22GB on a partition that stores nothing..

                1 Reply Last reply Reply Quote 0
                • MattSpellerM
                  MattSpeller @DustinB3403
                  last edited by

                  @DustinB3403 http://www.computerhope.com/unix/dd.htm

                  Examples at the bottom, you want to take a copy of the whole SDD drive and dump it to an image of whatever flavour you fancy.

                  1 Reply Last reply Reply Quote 1
                  • DustinB3403D
                    DustinB3403
                    last edited by

                    So

                    dd if=/dev/sdd of=/dev/sdb
                    

                    Should clone it from the larger to the smaller disk?

                    MattSpellerM 1 Reply Last reply Reply Quote 0
                    • MattSpellerM
                      MattSpeller @DustinB3403
                      last edited by MattSpeller

                      @DustinB3403 said:

                      So

                      dd if=/dev/sdd of=/dev/sdb
                      

                      Should clone it from the larger to the smaller disk?

                      Uhhhh yeahhhhhhh but you don't want to do that like that

                      First you want someone to double check what I'm suggesting, then read on

                      Something like:

                      dd if=/dev/sdd of=/dev/(hard drive)/(backup folder)/imageof32gbimportantthingy.img bs=4k

                      will get you a backup copy of the 32gb, then you can mangle it with GParted and not worry

                      DD is the ultimate "I want to copy X to Y and don't bother me with the details" tool - it's INCREDIBLY powerful

                      1 Reply Last reply Reply Quote 1
                      • DustinB3403D
                        DustinB3403
                        last edited by

                        So I have to backup it up to an img file first and then write it, is that correct?

                        MattSpellerM 1 Reply Last reply Reply Quote 0
                        • MattSpellerM
                          MattSpeller @DustinB3403
                          last edited by MattSpeller

                          @DustinB3403 said:

                          So I have to backup it up to an img file first and then write it, is that correct?

                          Back it up to the img file then consult with someone who knows more man. We're at the bleeding edge of my linux expertise here.

                          Were it me, I'd take the backup then resize the 32GB usb with gparted then you can use gparted or DD to copy it to the other USB

                          1 Reply Last reply Reply Quote 1
                          • stacksofplatesS
                            stacksofplates
                            last edited by stacksofplates

                            There might be an easier way, but I would dd it to a logical volume, then shrink the logical volume and then dd the volume to the smaller USB.

                            lvcreate -L 32G -n <name> <volumegroup>
                            
                            dd if=/dev/usbdrive of=/dev/<volumegroup>/<volumename> bs=4M
                            
                            resize2fs /dev/<volumegroup>/<volumename> 16G
                            
                            lvreduce -L 16G /dev/<volumegroup>/<volumename>
                            
                            dd if=/dev/<volumegroup>/<volumename> of=/dev/smallerusbdrive
                            

                            I would take a backup of the 32 GB usb drive before I did anything. You can just dd if=/dev/usbdrive of=/home/dustinb3403/usbfile bs=4M to make sure nothing is lost.

                            MattSpellerM 1 Reply Last reply Reply Quote 2
                            • MattSpellerM
                              MattSpeller @stacksofplates
                              last edited by

                              @johnhooks said:

                              then shrink the logical volume

                              How?

                              Also, what do you mean by a logical volume?

                              DashrenderD stacksofplatesS 2 Replies Last reply Reply Quote 0
                              • DashrenderD
                                Dashrender @MattSpeller
                                last edited by

                                @MattSpeller said:

                                @johnhooks said:

                                then shrink the logical volume

                                How?

                                Also, what do you mean by a logical volume?

                                A partition.

                                MattSpellerM 1 Reply Last reply Reply Quote 2
                                • MattSpellerM
                                  MattSpeller @Dashrender
                                  last edited by MattSpeller

                                  @Dashrender Thank you, I'm going to get a coffee, I'm slow today.

                                  1 Reply Last reply Reply Quote 1
                                  • stacksofplatesS
                                    stacksofplates @MattSpeller
                                    last edited by

                                    @MattSpeller said:

                                    @johnhooks said:

                                    then shrink the logical volume

                                    How?

                                    Also, what do you mean by a logical volume?

                                    I updated my post to show how

                                    MattSpellerM 1 Reply Last reply Reply Quote 1
                                    • MattSpellerM
                                      MattSpeller @stacksofplates
                                      last edited by

                                      @johnhooks hero of the thread - thank you, I'm saving that to try at home!

                                      stacksofplatesS 1 Reply Last reply Reply Quote 1
                                      • stacksofplatesS
                                        stacksofplates @MattSpeller
                                        last edited by

                                        @MattSpeller said:

                                        @johnhooks hero of the thread - thank you, I'm saving that to try at home!

                                        Ha don't call me a hero until we are sure it works 😛

                                        And like I said, there might be an easier way to do this but that's the first I thought of.

                                        1 Reply Last reply Reply Quote 1
                                        • stacksofplatesS
                                          stacksofplates
                                          last edited by

                                          All of that is also assuming you have space left to make a logical volume. I always leave extra room for LVM snapshots and one off scenarios like this.

                                          1 Reply Last reply Reply Quote 0
                                          • stacksofplatesS
                                            stacksofplates
                                            last edited by

                                            One other thing to watch for. Resize2fs only works with ext file systems. Last I heard you can't shrink an XFS file system, only grow it.

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