dCore Import Debian Packages to Mountable SCE extensions > Allwinner A10
[Project cancelled] my microsd card and my failures
aus9:
bmarkus
sound advice but I have not touched the android and I can't get any linux to boot to get to a linux shutdown. As you have the RPi and forgive me if you have a MK802 here is a quote and link
--- Quote ---Shutdown and Sleep
Though the Android 4.0 Mini PC can go to sleep and dim your screen, it has no shutdown option because it has no power button. By using a third-party app called Quick Boot, we were able to restart the system without yanking the plug. Quick Boot also has a Power Off option, but it doesn't actually turn the power off; it just freezes the screen until you pull the plug.
--- End quote ---
http://www.laptopmag.com/review/tablets/android-4.0-mini-pc.aspx
as you can see....in android there is no true power off ?
bmarkus:
OK, I expected it's Core, sorry
aus9:
So the first thing is, that each time I dd a dd image, I have done stacks,
each and every time, eventually I see no bootloader image for linux AND android starts
if I let it boot and click bottom hand corner its says usb is damaged
2) In order to dd my microsd I have 3 options
micro card inserted into sd card adapter inserted into single SD usb card reader
ditto...........................................................inserted into an usb multi card reader
micor card inserted directly ....................................into usb multi card reader
3) Today I decided to stop trying dd and investigate my micro sd a bit, a sandisk 4G
first insert it directly as a micro into multi reader
--- Code: ---ls -la /dev/disk/by-path
--- End code ---
find out its device names as I have internal drive alway sda, today micro is sdb and sdb1
--- Code: ---sudo umount /dev/sdb1
gparted
--- End code ---
When I tried to format it said some kind of error and then continued and reported it as fat16 and not fat32
hmmm
aus9:
ok so I relook it at
--- Code: ---fdisk /dev/sdb
Command (m for help): p
Disk /dev/sdb: 7948 MB, 7948206080 bytes
81 heads, 10 sectors/track, 19165 cylinders, total 15523840 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000a54e0
Device Boot Start End Blocks Id System
/dev/sdb1 2048 15523839 7760896 b W95 FAT32
--- End code ---
let android boot up completely and it says usb is damaged, kinda felt that was going to happen based on above
VERDICT
don't use micro sd direct in card reader or don't use gparted in micro sd reader
EDIT
reboot computer into TC to clear anything that might be interfering....I will do anything!
relook at microsd in direct into usb multi reader, yep its lost it partition just like the old micro sd card
--- Code: ---root@box:~# ls -al /dev/disk/by-path
total 0
drwxr-xr-x 2 root root 140 Nov 25 06:54 .
drwxr-xr-x 6 root root 120 Nov 25 06:55 ..
lrwxrwxrwx 1 root root 9 Nov 25 06:55 pci-0000:00:1d.7-usb-0:7.4:1.0-scsi-0:0:0:0 -> ../../sdb
lrwxrwxrwx 1 root root 9 Nov 25 06:55 pci-0000:00:1f.1-scsi-0:0:0:0 -> ../../sr0
lrwxrwxrwx 1 root root 9 Nov 25 06:55 pci-0000:00:1f.2-scsi-0:0:0:0 -> ../../sda
lrwxrwxrwx 1 root root 10 Nov 25 06:55 pci-0000:00:1f.2-scsi-0:0:0:0-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Nov 25 06:55 pci-0000:00:1f.2-scsi-0:0:0:0-part2 -> ../../sda2
--- End code ---
and so
--- Code: ---fdisk /dev/sdb
fdisk: can't open '/dev/sdb'
--- End code ---
roberts:
I use a USB card reader to dd the Allwinner image without issue.
1. Are you sure your mk802 is allwinner? I see that newer ones are Rockchip.
2. Does your mk802 boot other Linux distros?
3. If you have, then best to zero out any uboot code by the following:
dd if=/dev/zero of=/dev/sdX bs=512 count=2047
before attempting to dd a different image.
4. When attempting to boot does the light on keyboard or mouse become visible?
5. If your device always goes to Android, then it may be a faulty sdreader in mk802.
Suggest to go to http://www.miniand.com/wiki/MK802 and try some other images. Let us know.
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