[Nexus 6 Q&A, Help & Troubleshooting] frankofr:
I have some problems with my phone and I believe that it is a software issue (I tried to ask for help in this thread http://xdaforums.com/nexus-6/help/strange-device-behavior-believe-t3159186 but without a luck. I have even send it to the service but as nexus are not selling in my country they couldn't repair it.). I was thinking that there is some problem in partitions. Bellow you can see output of the commands on my phone. There are some differencies but I believe that they are because you have unencripted internal memory. What is the most strange to me is a persist partition which is 30MB on my phone and it is using just 52kB. Can you please help me to repair it.

u0_a109@shamu:/ $ su
root@shamu:/ # df
Filesystem Size Used Free Blksize
/dev 1.4G 64.0K 1.4G 4096
/sys/fs/cgroup 1.4G 12.0K 1.4G 4096
/mnt 1.4G 0.0K 1.4G 4096
/mnt/runtime/default/emulated 26.0G 4.6G 21.4G 4096
/mnt/runtime/read/emulated 26.0G 4.6G 21.4G 4096
/mnt/runtime/write/emulated 26.0G 4.6G 21.4G 4096
/system 1.9G 1.9G 16.1M 4096
/cache 248.0M 200.0K 247.8M 4096
/firmware 106.2M 60.1M 46.1M 4096
/persist 30.0M 52.0K 29.9M 1024
/fsg 784.0K 780.0K 4.0K 1024
/storage 1.4G 0.0K 1.4G 4096
/storage/emulated 26.0G 4.6G 21.4G 4096
/data 26.0G 4.6G 21.4G 4096
root@shamu:/ # cat /proc/partitions
major minor #blocks name

179 0 30535680 mmcblk0
179 1 114688 mmcblk0p1
179 2 16384 mmcblk0p2
179 3 384 mmcblk0p3
179 4 56 mmcblk0p4
179 5 16 mmcblk0p5
179 6 32 mmcblk0p6
179 7 1024 mmcblk0p7
179 8 256 mmcblk0p8
179 9 512 mmcblk0p9
179 10 500 mmcblk0p10
179 11 4156 mmcblk0p11
179 12 384 mmcblk0p12
179 13 1024 mmcblk0p13
179 14 256 mmcblk0p14
179 15 512 mmcblk0p15
179 16 500 mmcblk0p16
179 17 4 mmcblk0p17
179 18 512 mmcblk0p18
179 19 1024 mmcblk0p19
179 20 1024 mmcblk0p20
179 21 1024 mmcblk0p21
179 22 1024 mmcblk0p22
179 23 16384 mmcblk0p23
179 24 16384 mmcblk0p24
179 25 2048 mmcblk0p25
179 26 32768 mmcblk0p26
179 27 256 mmcblk0p27
179 28 32 mmcblk0p28
179 29 128 mmcblk0p29
179 30 8192 mmcblk0p30
179 31 1024 mmcblk0p31
259 0 2528 mmcblk0p32
259 1 1 mmcblk0p33
259 2 8 mmcblk0p34
259 3 16400 mmcblk0p35
259 4 9088 mmcblk0p36
259 5 16384 mmcblk0p37
259 6 262144 mmcblk0p38
259 7 65536 mmcblk0p39
259 8 1024 mmcblk0p40
259 9 2097152 mmcblk0p41
259 10 27840495 mmcblk0p42
179 32 4096 mmcblk0rpmb
254 0 27840495 dm-0
root@shamu:/ # mount
rootfs / rootfs ro,seclabel,relatime 0 0
tmpfs /dev tmpfs rw,seclabel,nosuid,relatime,size=1503692k,nr_inodes=170997,mode=755 0 0
devpts /dev/pts devpts rw,seclabel,relatime,mode=600 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
adb /dev/usb-ffs/adb functionfs rw,relatime 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,seclabel,relatime 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,seclabel,relatime 0 0
none /sys/fs/cgroup tmpfs rw,seclabel,relatime,size=1503692k,nr_inodes=170997,mode=750,gid=1000 0 0
pstore /sys/fs/pstore pstore rw,seclabel,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt tmpfs rw,seclabel,relatime,size=1503692k,nr_inodes=170997,mode=755,gid=1000 0 0
/dev/fuse /mnt/runtime/default/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /mnt/runtime/read/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /mnt/runtime/write/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0/dev/block/platform/msm_sdcc.1/by-name/system /system ext4 ro,seclabel,relatime,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,noatime,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/modem /firmware ext4 ro,context=u:object_r:firmware_file:s0,relatime,data=ordered 0 0
/dev/block/platform/msm_sdcc.1/by-name/persist /persist ext4 rw,seclabel,nosuid,nodev,relatime 0 0
/dev/block/platform/msm_sdcc.1/by-name/mdm1m9kefs3 /fsg ext4 ro,context=u:object_r:fsg_file:s0,nosuid,nodev,relatime 0 0
tmpfs /storage tmpfs rw,seclabel,relatime,size=1503692k,nr_inodes=170997,mode=755,gid=1000 0 0
/dev/fuse /storage/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/block/dm-0 /data ext4 rw,seclabel,nosuid,nodev,noatime,nodiratime,nobarrier,noauto_da_alloc,data=ordered 0 0
root@shamu:/ # ls -l /dev/block/platform/msm_sdcc.1/by-name/
lrwxrwxrwx root root 1970-01-01 15:11 aboot -> /dev/block/mmcblk0p7
lrwxrwxrwx root root 1970-01-01 15:11 abootBackup -> /dev/block/mmcblk0p13
lrwxrwxrwx root root 1970-01-01 15:11 boot -> /dev/block/mmcblk0p37
lrwxrwxrwx root root 1970-01-01 15:11 cache -> /dev/block/mmcblk0p38
lrwxrwxrwx root root 1970-01-01 15:11 cid -> /dev/block/mmcblk0p29
lrwxrwxrwx root root 1970-01-01 15:11 ddr -> /dev/block/mmcblk0p6
lrwxrwxrwx root root 1970-01-01 15:11 frp -> /dev/block/mmcblk0p18
lrwxrwxrwx root root 1970-01-01 15:11 keystore -> /dev/block/mmcblk0p24
lrwxrwxrwx root root 1970-01-01 15:11 kpan -> /dev/block/mmcblk0p36
lrwxrwxrwx root root 1970-01-01 15:11 logo -> /dev/block/mmcblk0p30
lrwxrwxrwx root root 1970-01-01 15:11 logs -> /dev/block/mmcblk0p25
lrwxrwxrwx root root 1970-01-01 15:11 mdm1dhob -> /dev/block/mmcblk0p28
lrwxrwxrwx root root 1970-01-01 15:11 mdm1hob -> /dev/block/mmcblk0p27
lrwxrwxrwx root root 1970-01-01 15:11 mdm1m9kefs1 -> /dev/block/mmcblk0p19
lrwxrwxrwx root root 1970-01-01 15:11 mdm1m9kefs2 -> /dev/block/mmcblk0p20
lrwxrwxrwx root root 1970-01-01 15:11 mdm1m9kefs3 -> /dev/block/mmcblk0p21
lrwxrwxrwx root root 1970-01-01 15:11 mdm1m9kefsc -> /dev/block/mmcblk0p33
lrwxrwxrwx root root 1970-01-01 15:11 metadata -> /dev/block/mmcblk0p2
lrwxrwxrwx root root 1970-01-01 15:11 misc -> /dev/block/mmcblk0p31
lrwxrwxrwx root root 1970-01-01 15:11 modem -> /dev/block/mmcblk0p1
lrwxrwxrwx root root 1970-01-01 15:11 oem -> /dev/block/mmcblk0p39
lrwxrwxrwx root root 1970-01-01 15:11 padA -> /dev/block/mmcblk0p11
lrwxrwxrwx root root 1970-01-01 15:11 padB -> /dev/block/mmcblk0p22
lrwxrwxrwx root root 1970-01-01 15:11 padC -> /dev/block/mmcblk0p40
lrwxrwxrwx root root 1970-01-01 15:11 padD -> /dev/block/mmcblk0p32
lrwxrwxrwx root root 1970-01-01 15:11 persist -> /dev/block/mmcblk0p26
lrwxrwxrwx root root 1970-01-01 15:11 recovery -> /dev/block/mmcblk0p35
lrwxrwxrwx root root 1970-01-01 15:11 rpm -> /dev/block/mmcblk0p8
lrwxrwxrwx root root 1970-01-01 15:11 rpmBackup -> /dev/block/mmcblk0p14
lrwxrwxrwx root root 1970-01-01 15:11 sbl1 -> /dev/block/mmcblk0p3
lrwxrwxrwx root root 1970-01-01 15:11 sbl1bak -> /dev/block/mmcblk0p12
lrwxrwxrwx root root 1970-01-01 15:11 sdi -> /dev/block/mmcblk0p4
lrwxrwxrwx root root 1970-01-01 15:11 sec -> /dev/block/mmcblk0p5
lrwxrwxrwx root root 1970-01-01 15:11 sp -> /dev/block/mmcblk0p23
lrwxrwxrwx root root 1970-01-01 15:11 ssd -> /dev/block/mmcblk0p34
lrwxrwxrwx root root 1970-01-01 15:11 system -> /dev/block/mmcblk0p41
lrwxrwxrwx root root 1970-01-01 15:11 tz -> /dev/block/mmcblk0p10
lrwxrwxrwx root root 1970-01-01 15:11 tzBackup -> /dev/block/mmcblk0p16
lrwxrwxrwx root root 1970-01-01 15:11 userdata -> /dev/block/mmcblk0p42
lrwxrwxrwx root root 1970-01-01 15:11 utags -> /dev/block/mmcblk0p9
lrwxrwxrwx root root 1970-01-01 15:11 utagsBackup -> /dev/block/mmcblk0p15
lrwxrwxrwx root root 1970-01-01 15:11 versions -> /dev/block/mmcblk0p17
root@shamu:/#