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    How to resize root partition (preferably) before or (less preferably) after install?

    Scheduled Pinned Locked Moved Unsolved Oneplus 5/5T
    resizingroot partitioninstallfdisk
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      • K Offline
        k7paul
        last edited by

        Hi all,

        I have just installed the Ubuntu touch 20.04 on my OnePlus 5T, and realised that the root partition was created very small:

        phablet@ubuntu-phablet:~$ df -h
Filesystem                          Size  Used Avail Use% Mounted on
udev                                3.7G  744K  3.7G   1% /dev
tmpfs                               769M  4.8M  765M   1% /run
/dev/sda13                          111G  2.6G  103G   3% /userdata
/dev/sde21                          2.9G  2.7G  190M  94% /
/dev/loop0                          457M  295M  153M  66% /android

        I have found some instructions to resize the partition, however they seem to be targeted at situations where / is mounted over the loop from a file in /userdata (e.g. system.img). However, on my phone this does not seem to be the case: the only loop device mounted in a 457MB partition mounted at /android; the actual root is on /dev/sde21 (see above), and the partition table on /dev/sde is wild! Also I am curious where the 6 storage devices come from (sda..sdf), but that's another story.

        So the question is: is it possible to (a) read some info somewhere on why so many partitions are created during the installation, and (b) during the partitioning stage alter the size of the root partition? I was using ubports-installer on Mac OS, and it obviously didn't give those options.

        Thank you!

        LuksusL 1 Reply Last reply Reply Quote 1
        • LuksusL Offline
          Luksus @k7paul
          last edited by

          @k7paul I described here under "Snaps" how to resize :
          https://forums.ubports.com/post/78724

          However I believe you wont get much more out of the systempartion.

          Devices: BQ e4.5, Fairphone 2, Fairphone 3, Lenovo X605F, Pinephone, Moto Z2 Force, OnePlus5T

          K 1 Reply Last reply Reply Quote 0
          • K Offline
            k7paul @Luksus
            last edited by

            @Luksus In my case nothing happened as the partition was already 786432 blocks long, so that did not help.

            What I am more wondering about is why is the partition table created exactly like it is? It's clearly made by Ubuntu Installer and not Android (when Android [e.g. LineageOS] is installed, the partition table is definitely different.) And the partitions are crazy (see below)

            So I hypothesise that it's possible to change the partition table setup [e.g. create root at /dev/sdaX, see below] at installation time, but not sure yet how -- any ideas?

            Also, I see that /dev/sde is 4GB. I wonder if this is on the hardware level, or there is another mapping level done by linux kernel -- will check this again by reinstalling Android and looking at the devices. journalctl or dmesg don't hint whether or not these are separate devices; however, udev shows each of them has its own SCSI LUN which I think implies these are indeed separate devices.

            P.S.
            /dev/sda: 113.6G (out of those, 113.2G mounted at /userdata)
            /dev/sdb: 4M
            /dev/sdc: 4M
            /dev/sdd: 128M
            /dev/sde: 4G
            /dev/sdf: 1.5 (1G mounted at /var/lib/lxc/android/rootfs/vendor)

            Partition table for /dev/sde:

            Disk /dev/sde: 4 GiB, 4294967296 bytes, 1048576 sectors
Disk model: KLUDG4U1EA-B0C1
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 8192 bytes / 8192 bytes
Disklabel type: gpt
Disk identifier: 98101B32-BBE2-4BF2-A06E-2BB33D000C20

Device      Start     End Sectors   Size Type
/dev/sde1       6     133     128   512K unknown
/dev/sde2     134     261     128   512K unknown
/dev/sde3     262     773     512     2M unknown
/dev/sde4     774    1285     512     2M unknown
/dev/sde5    1286    1413     128   512K unknown
/dev/sde6    1414    1541     128   512K unknown
/dev/sde7    1542    1545       4    16K unknown
/dev/sde8    1546    1673     128   512K unknown
/dev/sde9    1674    1801     128   512K unknown
/dev/sde10   1802   29961   28160   110M Microsoft basic data
/dev/sde11  29962   34057    4096    16M unknown
/dev/sde12  34058   35081    1024     4M unknown
/dev/sde13  35082   36105    1024     4M unknown
/dev/sde14  36106   36361     256     1M unknown
/dev/sde15  36362   44553    8192    32M unknown
/dev/sde16  44554   46601    2048     8M unknown
/dev/sde17  46602   48649    2048     8M unknown
/dev/sde18  48650   52745    4096    16M unknown
/dev/sde19  52746   69129   16384    64M unknown
/dev/sde20  69130   85513   16384    64M unknown
/dev/sde21  85514  871945  786432     3G unknown
/dev/sde22 871946  888329   16384    64M unknown
/dev/sde23 888330  888330       1     4K unknown
/dev/sde24 888331  888586     256     1M unknown
/dev/sde25 888587  888714     128   512K unknown
/dev/sde26 888715  888842     128   512K unknown
/dev/sde27 888843  888970     128   512K unknown
/dev/sde28 888971  889098     128   512K unknown
/dev/sde29 889099  889226     128   512K unknown
/dev/sde30 889227  889354     128   512K unknown
/dev/sde31 889355  889418      64   256K unknown
/dev/sde32 889419  889482      64   256K unknown
/dev/sde33 889483  889483       1     4K unknown
/dev/sde34 889484  897839    8356  32.7M unknown
/dev/sde35 897840  897840       1     4K unknown
/dev/sde36 897841  898096     256     1M unknown
/dev/sde37 898097  900144    2048     8M unknown
/dev/sde38 900145  900656     512     2M unknown
/dev/sde39 900657  900688      32   128K unknown
/dev/sde40 900689  917072   16384    64M unknown
/dev/sde41 917073  917104      32   128K unknown
/dev/sde42 917105  917136      32   128K unknown
/dev/sde43 917137  917648     512     2M unknown
/dev/sde44 917649  918160     512     2M unknown
/dev/sde45 918161  918672     512     2M unknown
/dev/sde46 918673  919184     512     2M unknown
/dev/sde47 919185  927376    8192    32M unknown
/dev/sde48 927377 1048570  121194 473.4M unknown

            Partition labels for all devices:

            lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/modemst2 -> ../../sdf2
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/modemst1 -> ../../sdf1
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/fw_8v1ee -> ../../sde44
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/fw_4g9n4 -> ../../sde45
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/minidump -> ../../sde47
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/pmicbak -> ../../sde9
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/hypbak -> ../../sde6
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/vendor -> ../../sdf6
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/fw_4t0n8 -> ../../sde46
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/hyp -> ../../sde5
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/pmic -> ../../sde8
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/reserve3 -> ../../sdf7
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/fsc -> ../../sdf4
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/fsg -> ../../sdf3
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/md5 -> ../../sdf5
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/logdump -> ../../sde40
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/sec -> ../../sde7
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/fw_4j1ed -> ../../sde43
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/logfs -> ../../sde37
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/cmnlib -> ../../sde27
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/toolsfv -> ../../sde36
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/storsec -> ../../sde41
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/tz -> ../../sde3
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/msadp -> ../../sde32
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/recovery -> ../../sde22
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/storsecbak -> ../../sde42
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/cmnlibbak -> ../../sde28
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/keymasterbak -> ../../sde26
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/splash -> ../../sde34
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/apdp -> ../../sde31
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/cmnlib64bak -> ../../sde30
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/system -> ../../sde21
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/dpo -> ../../sde33
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/tzbak -> ../../sde4
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/cmnlib64 -> ../../sde29
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/sti -> ../../sde38
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/devcfg -> ../../sde39
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/boot_aging -> ../../sde20
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/limits -> ../../sde35
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/boot -> ../../sde19
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/modem -> ../../sde10
lrwxrwxrwx 1 root root 11 Feb 25 12:57 /dev/disk/by-partlabel/reserve1 -> ../../sda10
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/keymaster -> ../../sde25
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/bluetooth -> ../../sde24
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/xblbak -> ../../sdc1
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/ablbak -> ../../sde17
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/rpmbak -> ../../sde2
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/LOGO -> ../../sde18
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/xbl -> ../../sdb1
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/devinfo -> ../../sde23
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/mdtp -> ../../sde15
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/abl -> ../../sde16
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/dsp -> ../../sde11
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/dip -> ../../sde14
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/oem_dycnvbk -> ../../sda7
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/cache -> ../../sda3
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/mdtpsecapp -> ../../sde12
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/oem_stanvbk -> ../../sda8
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/persist -> ../../sda2
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/ddr -> ../../sdd3
lrwxrwxrwx 1 root root 10 Feb 25 12:56 /dev/disk/by-partlabel/rpm -> ../../sde1
lrwxrwxrwx 1 root root 11 Feb 25 12:57 /dev/disk/by-partlabel/userdata -> ../../sda13
lrwxrwxrwx 1 root root 11 Feb 25 12:57 /dev/disk/by-partlabel/reserve2 -> ../../sda11
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/misc -> ../../sda4
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/param -> ../../sda9
lrwxrwxrwx 1 root root 11 Feb 25 12:57 /dev/disk/by-partlabel/config -> ../../sda12
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/frp -> ../../sda6
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/keystore -> ../../sda5
lrwxrwxrwx 1 root root 11 Feb 25 12:56 /dev/disk/by-partlabel/mdtpsecappbak -> ../../sde13
lrwxrwxrwx 1 root root 10 Feb 25 12:57 /dev/disk/by-partlabel/ssd -> ../../sda1
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/cdt -> ../../sdd2
lrwxrwxrwx 1 root root 10 Feb 25 12:11 /dev/disk/by-partlabel/reserve -> ../../sdd1
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