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    How to increase cache partition ( or any partition ) on Ubuntu Touch phone? Question.

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      • S Offline
        Stefano
        last edited by

        I would like to ask if someone could write a step by step tutorial how to increase a cache partition (or any other ) on Meizu Pro 5, as currently Xenial builds are failing to install in Recovery. Apparently the cache/recovery partition is too small for that image. 15.04 install without any problem though. Anyone to help? I managed to unpack the ubuntu*. tar.xz (or ubports*.tar.xz) to system and tried with fdisk, but I'm unable to delete the right partition and create a new one. So I'm pretty stuck at the moment. Any advice is appreciated. Thanks.

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        • M Offline
          Marathon2422 @Stefano
          last edited by

          @stefano did you flash ubuntu touch first and then flash 15.04…or 16.04. as flashing U T first sorts out the partition

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          • S Offline
            Stefano @Marathon2422
            last edited by

            @marathon2422 I have tried to flash 16.04 version 14 and it fails at recovery. The version 1 I installed without any problem, but this version 14 and also later ones doesn't. Same message in recovery, contact support.
            15.04 install without any issue.

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            • S Offline
              Stefano @Marathon2422
              last edited by

              @marathon2422 what did you mean the flashing UT sorts out partition?

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              • mihaelM Offline
                mihael
                last edited by mihael

                The way I did it (taking space from the 'custom' partition and adding it to the 'cache' partition):

                • it is not possible to do it from inside ubuntu so you need to install twrp and reboot that
                • now the fdisk inside twrp is too weak and cannot help us so mount the ubuntu system now which contains the fdisk we need:
                mount /dev/block/sda41 /system
                mount -t proc proc /system/proc
                mount -t sysfs sys /system/sys
                mount -o bind /dev /system/dev
                chroot /system /bin/bash
                
                • now we have an fdisk that can do this:
                • fdisk: delete the 'custom' partition (partition 42 for my meizu pro 5)
                • fdisk: create the 'custom' partition with a smaller size (I calculated: 512 - (700 - 512) = 512 - 188 = 324MB so that 188 would be available to add to the current size of the 'cache' partition)
                • parted: give name 'custom' to the newly created partition name 42 custom
                • format that partition: mke2fs -t ext4 -m 0 /dev/block/sda42 - now, from what I understand from my notes, that didn't work so I had to reboot in twrp and then it worked
                • check if you want with df -h that you have a smaller 'custom' partition
                • check if you want that you can boot your phone and everything is ok
                • now repeat the above instructions for booting the twrp recovery and then mounting the ubuntu system
                • now repeat the above instructions do delete and recreate the 'cache' partition with a bigger size and then format it:
                • fdisk: delete 43 (that is the number of my cache partition on my meizu pro 5)
                • fdisk: recreate 43 - with the max size - I decreased the 'custom' partition so that the new 'cache' would be 700MB
                • parted: name 43 cache
                • reboot in twrp and format it: mke2fs -t ext4 -m 0 /dev/block/sda43
                • df -h or sudo parted -l - there you go!
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                • S Offline
                  Stefano @mihael
                  last edited by

                  @mihael I'll give it a try. Thanks.

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                  • S Offline
                    Stefano @mihael
                    last edited by

                    @mihael I think I managed to do that. How would I verify how big my cache is now?

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                    • mihaelM Offline
                      mihael
                      last edited by

                      Oh, with df -h

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                      • S Offline
                        Stefano @mihael
                        last edited by

                        @mihael with adb shell or ?

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                        • S Offline
                          Stefano @mihael
                          last edited by

                          @mihael /dev/disk/by-partlabel/cache 496M 4.2M 482M 1% /android/cache what that means ??? Cos I changed it to 700 and saved it that way.

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                          • mihaelM Offline
                            mihael
                            last edited by

                            From terminal even...

                            I don't know... Mine shows

                            /dev/disk/by-partlabel/cache     679M  768K  664M   1% /android/cache
                            
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                            • S Offline
                              Stefano @mihael
                              last edited by Stefano

                              @mihael for some reason it did not change/save even after I saved id with w and rebooted and formated the cache ???
                              Device Start End Sectors Size Type
                              /dev/block/sda1 1024 1279 256 1M Microsoft basic data
                              /dev/block/sda2 1280 1343 64 256K Microsoft basic data
                              /dev/block/sda3 1344 1407 64 256K Microsoft basic data
                              /dev/block/sda21 2048 3071 1024 4M Microsoft basic data
                              /dev/block/sda22 3072 5119 2048 8M Microsoft basic data
                              /dev/block/sda23 5120 5631 512 2M Microsoft basic data
                              /dev/block/sda24 5632 6655 1024 4M Microsoft basic data
                              /dev/block/sda25 6656 7679 1024 4M Microsoft basic data
                              /dev/block/sda26 7680 13823 6144 24M Microsoft basic data
                              /dev/block/sda27 13824 22015 8192 32M Microsoft basic data
                              /dev/block/sda28 22016 30207 8192 32M Microsoft basic data
                              /dev/block/sda29 30208 35327 5120 20M Microsoft basic data
                              /dev/block/sda30 35328 40447 5120 20M Microsoft basic data
                              /dev/block/sda31 40448 45567 5120 20M Microsoft basic data
                              /dev/block/sda32 45568 50687 5120 20M Microsoft basic data
                              /dev/block/sda33 50688 55807 5120 20M Microsoft basic data
                              /dev/block/sda41 65536 720895 655360 2.5G Microsoft basic data
                              /dev/block/sda42 720896 851967 131072 512M Microsoft basic data
                              /dev/block/sda43 851968 983039 131072 512M Microsoft basic data
                              /dev/block/sda44 983040 7633914 6650875 25.4G Microsoft basic data

                              But when I saved it the table was this:

                              dev/block/sda21 2048 3071 1024 4M Microsoft basic data
                              /dev/block/sda22 3072 5119 2048 8M Microsoft basic data
                              /dev/block/sda23 5120 5631 512 2M Microsoft basic data
                              /dev/block/sda24 5632 6655 1024 4M Microsoft basic data
                              /dev/block/sda25 6656 7679 1024 4M Microsoft basic data
                              /dev/block/sda26 7680 13823 6144 24M Microsoft basic data
                              /dev/block/sda27 13824 22015 8192 32M Microsoft basic data
                              /dev/block/sda28 22016 30207 8192 32M Microsoft basic data
                              /dev/block/sda29 30208 35327 5120 20M Microsoft basic data
                              /dev/block/sda30 35328 40447 5120 20M Microsoft basic data
                              /dev/block/sda31 40448 45567 5120 20M Microsoft basic data
                              /dev/block/sda32 45568 50687 5120 20M Microsoft basic data
                              /dev/block/sda33 50688 55807 5120 20M Microsoft basic data
                              /dev/block/sda41 65536 720895 655360 2.5G Microsoft basic data
                              /dev/block/sda42 720896 797700 76805 300M Microsoft basic data
                              /dev/block/sda43 797952 983039 185088 723M Microsoft basic data
                              /dev/block/sda44 983040 7633914 6650875 25.4G Microsoft basic data

                              SO WHAT NOW, WHY IT DID NOT SAVE???

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                              • mihaelM Offline
                                mihael
                                last edited by

                                I'm sorry, I really don't know... Maybe it's some linux issue that someone with more experience could shed light upon...

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                                • mihaelM Offline
                                  mihael
                                  last edited by

                                  What does df -h from twrp console show?

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                                  • S Offline
                                    Stefano @mihael
                                    last edited by Stefano

                                    @mihael Did you do it on the phone TWRP terminal or via adb? I mean the whole repartitioning. Cos I have used adb shell for it.

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                                    • S Offline
                                      Stefano @mihael
                                      last edited by

                                      @mihael /dev/disk/by-partlabel/cache 496M 4.2M 482M 1% /android/cache

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                                      • mihaelM Offline
                                        mihael
                                        last edited by

                                        @Stefano I believe I did it through ssh...

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                                        • S Offline
                                          Stefano @mihael
                                          last edited by

                                          @mihael I give it a try again later, maybe I'll figure it out. (will try with TWRP terminal as well)

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                                          • mihaelM Offline
                                            mihael
                                            last edited by

                                            Let me know...

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                                            • S Offline
                                              Stefano @mihael
                                              last edited by

                                              @mihael I managed to do it. The problem was that I did not format the newly created partitions properly and did not change the names of them as I did not seen such an option in fdisk , but, there is an expert menu under ,x, and there is option to rename. After I renamed it, I format it and now it shows partition 43 = 723m, so I think that should suffice. Will try now to flash 16.04 now, we'll see what happens now! Thank you a lot for your help.

                                              Edit. It flashed 16.04 without failing in recovery πŸ™‚ πŸ™‚ πŸ™‚

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