5.0.2 Nexus7 2012

ref:

• http://forum.xda-developers.com/showthread.php?t=1907796
• https://developers.google.com/android/nexus/images

這個是另一種方法：http://www.android-apk.com/2014/11/nexus-7-nexus-10-%E5%B9%B3%E6%9D%BF-android-5-0-lollipop-ota-link/


Download, 結果是tgz, 解開。
首先 adb 要能動。
用 adb reboot-bootloader
重開機，進入 bootloader
fastboot oem ublock
停住，畫面上問你Yes, No, touch "Yes"

...
(bootloader) erasing userdata...
(bootloader) erasing userdata done
(bootloader) erasing cache...
(bootloader) erasing cache done
(bootloader) unlocking...
(bootloader) Bootloader is unlocked now.
OKAY [ 11.693s]
finished. total time: 11.693s

接著就可以到剛剛解開的tgz的folder 去run script:

/nakasi-lrx22g$ ./flash-all.sh 
...
(bootloader) Bootloader is already unlocked
OKAY [  0.007s]
finished. total time: 0.007s
erasing 'boot'...
OKAY [  0.027s]
finished. total time: 0.027s
******** Did you mean to fastboot format this partition?
erasing 'cache'...
OKAY [  0.053s]
finished. total time: 0.053s
erasing 'recovery'...
OKAY [  0.028s]
finished. total time: 0.028s
******** Did you mean to fastboot format this partition?
erasing 'system'...
OKAY [  0.090s]
finished. total time: 0.090s
******** Did you mean to fastboot format this partition?
erasing 'userdata'...
OKAY [  1.087s]
finished. total time: 1.087s
sending 'bootloader' (2100 KB)...
OKAY [  0.268s]
writing 'bootloader'...
FAILED (remote: (InvalidState))
finished. total time: 0.408s
rebooting into bootloader...
OKAY [  0.002s]
finished. total time: 0.052s
archive does not contain 'boot.sig'
archive does not contain 'recovery.sig'
archive does not contain 'system.sig'
archive does not contain 'vendor.img'
Creating filesystem with parameters:
    Size: 14442037248
    Block size: 4096
    Blocks per group: 32768
    Inodes per group: 8176
    Inode size: 256
    Journal blocks: 32768
    Label: 
    Blocks: 3525888
    Block groups: 108
    Reserved block group size: 863
Created filesystem with 11/883008 inodes and 96825/3525888 blocks
Creating filesystem with parameters:
    Size: 464519168
    Block size: 4096
    Blocks per group: 32768
    Inodes per group: 7088
    Inode size: 256
    Journal blocks: 1772
    Label: 
    Blocks: 113408
    Block groups: 4
    Reserved block group size: 31
Created filesystem with 11/28352 inodes and 3654/113408 blocks
--------------------------------------------
Bootloader Version...: 4.23
Baseband Version.....: N/A
Serial Number........: 015d257xxxxxxxxx
--------------------------------------------
checking product...
OKAY [  0.040s]
checking version-bootloader...
OKAY [  0.023s]
sending 'boot' (5152 KB)...
OKAY [  0.636s]
writing 'boot'...
OKAY [  0.181s]
sending 'recovery' (5688 KB)...
OKAY [  0.691s]
writing 'recovery'...
OKAY [  0.200s]
erasing 'system'...
OKAY [  0.045s]
sending 'system' (648819 KB)...
OKAY [ 77.444s]
writing 'system'...
OKAY [ 31.717s]
erasing 'userdata'...
OKAY [  0.997s]
sending 'userdata' (137526 KB)...
OKAY [ 16.400s]
writing 'userdata'...
OKAY [  8.035s]
erasing 'cache'...
OKAY [  0.039s]
sending 'cache' (9052 KB)...
OKAY [  1.094s]
writing 'cache'...
OKAY [  0.492s]
rebooting...

finished. total time: 138.227s

然後就自己重開了...
進入圓球跑跑畫面.....持續 5 min

開進 android 畫面。

還好，沒有明顯變慢，當然也不會變快。
本來，asus 做的這台就是慢到不行。

---

第二天：一般還好，有些ap 開啟特別慢，像 chrome, twitter, fb
而且有月用月慢的感覺。
猜測這是 2012 n7 的nandflash 問題。
只有靠 f2fs 才能解決了。

2015/4/20
因為 linux journal login 有問題，一直說我exceeded the device limit,
然後 linux journal 的 mail 又說他 OK
所以我用一樣的方法把 nexus 7 重新燒 4.4.4