Booting from SD card
#1
I had update on the Devel channel - and Dev 53 on my PP (eMMC) , and decided to try to boot from SD.


I have just downloaded the latest "Stable" from here  -  It says Stable 53 
https://ci.ubports.com/job/rootfs/job/ro...stemimage/

Unpacked , and wrote the img file to a Sandisk Ultra 32GB card w. etcher , no errors.
Inserted the SD in the PP , and did a started the phone.

When it booted, it asked for my "screen lock code" , and it was connected to my WiFi Huh 
Now i'm in doubt if it has booted from the SD card at all, if it doesn't use the eMMC , how does it know my Screenlock code & wifi passwd ??
I somewhat expected it to boot up as "Factory reset" , or ??


My SIM card was not working, i had to go to Cellular settings and select my "provider number" 23xxxx  (Telia)
It was set to Auto , and 23xxx was listed below. Once i chose the 23xxx it connected to GSM , and showed Telia.

When i went into update settings - , and had a look it now shows stable, so something has happened.
And there was actually an update waiting, even though i just downloaded "latest"  - Where's the SHA-Sum of the file !!!!
The update is named Ubuntu Touch Version 3 , and i think that's the old Dev 53 , that @Luke promoted to Stable 2 days ago.

I guess my question is does the OS/PP have some persistent storage where it saves Screen & WiFi pwd's ?
Or does it "sneak read" from the eMMC, even if it is booted from the SD ?



Right now i'm updating my PP with the Stable 3 , that update said it found OTA.

More to come Smile 

/Bingo

Wutt !!
After updating with the OTA , and reboot.

It now seems to be Factory reset.
The first thing i'm asked after the reboot is to set Language

Yupp , i just went through a "Factory reset setup" , Lang,TZ,Screen-pwd, WiFi-pwd".
Strange !!!  , is this intended behaviour , or just a "Quirk" ??

I downloaded Teleport (telegram) , and gets the verification code via sms , but it wont accept it.
I didn't see that issue on the eMMC install , but it could be app related.
Edit: On 2'nd try & SMS , it registered , even if it still said the sms code was too long


Well giving stable 3 a go today, and prob switch to Devel in the afternoon.

Once again thank you for your efforts

/Bingo

Hmm ....


Code:
root@ubuntu-phablet:~# lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
mmcblk2      179:32  0 14,7G  0 disk
├─mmcblk2p8  179:40  0  2,4G  0 part
├─mmcblk2p6  179:38  0 63,9M  0 part
├─mmcblk2p4  179:36  0  64M  0 part
├─mmcblk2p2  179:34  0    1M  0 part
├─mmcblk2p10 179:42  0  8,6G  0 part
├─mmcblk2p9  179:41  0  2,4G  0 part
├─mmcblk2p7  179:39  0 63,9M  0 part
├─mmcblk2p5  179:37  0 64,3M  0 part
├─mmcblk2p3  179:35  0    8M  0 part
└─mmcblk2p1  179:33  0  1,9M  0 part
mmcblk0      179:0    0 29,7G  0 disk
├─mmcblk0p9  179:9    0  2,4G  0 part /
├─mmcblk0p10 179:10  0  8,6G  0 part /userdata
├─mmcblk0p7  179:7    0 63,9M  0 part
├─mmcblk0p5  179:5    0 64,3M  0 part
├─mmcblk0p3  179:3    0    8M  0 part /android/persist
├─mmcblk0p1  179:1    0  1,9M  0 part
├─mmcblk0p8  179:8    0  2,4G  0 part /android/cache
├─mmcblk0p6  179:6    0 63,9M  0 part
├─mmcblk0p4  179:4    0  64M  0 part /android/boot
└─mmcblk0p2  179:2    0    1M  0 part
mmcblk2boot1 179:96  0    4M  1 disk
mmcblk2boot0 179:64  0


root@ubuntu-phablet:~# df -h
Filesystem                      Size  Used Avail Use% Mounted on
udev                            833M  4,0K  833M  1% /dev
tmpfs                          193M  804K  192M  1% /run
/dev/mmcblk0p10                8,4G  134M  7,8G  2% /userdata
/dev/mmcblk0p9                  2,3G  1,6G  596M  73% /
none                            4,0K    0  4,0K  0% /android
tmpfs                          964M  4,0K  964M  1% /etc/fstab
/dev/disk/by-partlabel/cache    2,4G  3,6M  2,3G  1% /android/cache
/dev/disk/by-partlabel/boot_a    45M  39M  2,4M  95% /android/boot
/dev/disk/by-partlabel/persist  476K  24K  428K  6% /android/persist
none                            4,0K    0  4,0K  0% /sys/fs/cgroup
tmpfs                          964M  7,0M  957M  1% /tmp
none                            5,0M  4,0K  5,0M  1% /run/lock
none                            964M  172K  964M  1% /run/shm
none                            100M    0  100M  0% /run/user
tmpfs                          964M    0  964M  0% /media
cgmfs                          100K    0  100K  0% /run/cgmanager/fs
tmpfs                          964M    0  964M  0% /var/lib/openvpn/chroot/tmp
tmpfs                          964M    0  964M  0% /var/lib/sudo
tmpfs                          193M  4,1M  189M  3% /run/user/32011
root@ubuntu-phablet:~#

root@ubuntu-phablet:~# ls /dev/disk/by-partlabel/ -l
total 0
lrwxrwxrwx 1 root root 15 Jun 20 09:13 boot_a -> ../../mmcblk0p4
lrwxrwxrwx 1 root root 15 Jun 20 09:13 boot_b -> ../../mmcblk0p5
lrwxrwxrwx 1 root root 15 Jun 20 09:13 cache -> ../../mmcblk0p8
lrwxrwxrwx 1 root root 15 Jun 20 09:13 loader -> ../../mmcblk0p1
lrwxrwxrwx 1 root root 15 Jun 20 09:13 persist -> ../../mmcblk0p3
lrwxrwxrwx 1 root root 15 Jun 20 09:13 recovery_a -> ../../mmcblk0p6
lrwxrwxrwx 1 root root 15 Jun 20 09:13 recovery_b -> ../../mmcblk0p7
lrwxrwxrwx 1 root root 15 Jun 20 09:13 scr -> ../../mmcblk0p2
lrwxrwxrwx 1 root root 15 Jun 20 09:13 system -> ../../mmcblk0p9
lrwxrwxrwx 1 root root 16 Jun 20 09:13 userdata -> ../../mmcblk0p10

Seems like there is a partition called /android/persist  - that according to lsblk is on the eMMC (if i read that correctly)
#2
FYI

tkaiser writes here (in 2016 though)
https://forum.pine64.org/showthread.php?...32#pid6232


Pine64 is limited to ~22/23 MB/s sequential speed anyway (as most other Allwinner SBC) and the most important performance factor is random I/O. So take care that you choose cards that show high random I/O performance especially with small record sizes that are from one of the few manufacturers that build their retail products from both their own NAND chips and own controllers: http://forum.armbian.com/index.php/topic...rformance/

He's one of the leading forces on Armbian , and knows his SOC.

This indicates to me, that a Sandisk Ultra vs Sandisk Extreme would prob have same performance in the PP.
Just make sure you get an original card, the extra performance of the Extreme would prob not be utilized on the PP.

Edit:
The PP uses an Alwinner SOC , not a Pine64 SOC
But i'd still expect a Sandisk Ultra to be able to fully utilize the SoC

/Bingo


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