重庆环氧砂浆地坪:几乎各种rom通用的 A2SD 刷机包 (2.7.5.1

来源：百度文库编辑：九乡新闻网时间：2024/04/28 14:31:45

有疑难最好能PM～
之前观察不仔细，直到回复别人问题时打开tonny 7月14一看才发现有A2SD，进系统a2sd check发现a2sd启用中…，所以用tonny 6月以后版本的朋友可以不用刷了

…，有重大更新的版本俺会测试建议更新

tonny 8月8-28 rom 遇到A2SD无法激活的朋友，推荐你们刷9月18或以后的版本，已经彻底解决A2SD不自动激活的问题

刷法如同平时刷ROM一样，可在已有Darktremor a2sd的rom上升级(也就是刷)，已有A2SD的各种基于CM MOD的ROM就免刷了！。

下载2.7.5.1ROM比较老的下载2.7

作者更新页面：http://forum.xda-developers.com/showthread.php?p=7025105
2.7：http://forum.xda-developers.com/showthread.php?t=670087

A2SD是Application To SDCard的缩写，它能实现将APK安装到SD卡，这之前有一些前提条件和注意事项：

刷A2SD之前您需要先将SD卡做个EXT分区(分区会清空SD 请注意备份)，进过RA Recovery的朋友可能注意到过一个叫Partition sdcard的菜单，选中它一路按home下一步，分区执行完执行EXT2 to EXT3，分区就完成了。这时才刷系统和A2SD(如果集成的a2sd没有激活或刷完a2sd才有ext分区，可能需要使用a2sd reinstall来激活)，进入系统后可以见到/system/sd这个路径，且/data/app路径下的apk在/system/sd里面那A2SD应该是起作用了。用a2sd命令可以100%确定a2sd处于什么状况不用瞎猜…，adb shell执行a2sd check结果如下图红线部分就是成了：

下载 (29.93 KB)
2010-8-12 00:54

对于进阶使用者我还推荐使用以下命令：

a2sd lowmem-optimum
详见a2sd帮助的Low Memory Killer Commands部分，a2sd 2.7.5一大特色是能配置内存策略，就不用再装内存管理软件了，optimum是我认为最合适的一项。

a2sd zipalign
详见a2sd帮助的ZipAlign Commands部分，据说这个参数能让apk的访问速度稍微加快。

*a2sd cachesd
详见a2sd帮助的Dalvik Cache Commands部分，这个参数能把缓存也放入SD卡，如果你的TF卡写入速度超过10M/s 读取超过15M/s的话推荐！这么做过后机载的app空间几乎不会消耗

*注：

并不是所有recovery能备份还原cahcesd创建的文件，如果您遇到启用cachesd的备份还原后卡在开机画面，请务必使用这个GodSpeed Recovery，或用ROM Manager刷Clockwork Recovery。如果您还知道有别的支持a2sd的recovery麻烦共享一下啦，因为GodSpeed是超频768的，极个别Hero200可能跑不了这个频率。

a2sd repair
详见Apps2SD Diagnostic Commands部分，在作者发布页的回帖中，我总结了一条经验，用过任何a2sd命令后执行一次a2sd repair，能有效的预防一些不可预知的负面情况。我个人推荐每次更新软件后和备份前能想起来的话就执行一次这条命令，小心使得万年船。

————————————————————————————————————————

Q & A :

(2.7.5 RC2-3 有命令变更：原install现reinstall，原swap现reswap)

Q：分区时的swap是什么，swap和ext各应该设置多大？
A：默认值(32 & 512)即可，这些DIY的Recovery是给目标机型量身定做的，大侠们已经将最合适的值作为默认。swap分区的作用是把部分内存数据或热代码存入这个分区可以让内存某程度上更多空余和提高一些软件的执行效率，类似于Windows的虚拟内存和boostr。但用在手机的和PC的Linux不太一样，swap过大会卡机甚至频繁出现FC，和内存相比 SD卡的带宽小了几百倍，它对一些频繁存取的系统数据来说太慢了，如果过大比例的内存数据被置于SD的swap分区前面的情况就会发生。

Q：为何A2SD启用后，安装程序仍会减少机载空间？
A：安装的软件会在/data目录下产生配置文件缓存文件 Dalvik Cache 或数据库文件等。例举我的情况：新装系统剩余100M空间，装软件到空间不足警告(低于16M)，启用A2SD后装同样多的软件 ROM的可用空间还有60多M。A2SD是有积极作用的

。

如果启用A2SD后空间又用超了，可以使用a2sd cachesd命令能又给你腾出80MB左右空间出来。但是需要注意：移动Dalvik Cache到EXT分区可能会让程序响应变慢，特别是卡速度不够快的话(卡标的Class不要管关键要看实测速度，写入不达10M/s读取不达15M/s的TF卡不推荐启用cachesd功能会感觉到软件启动时间变长了)。

Q：启用A2SD后我还能用磁盘模式访问SD卡吗？
A：能的，就和平时一样用，系统只会umount FAT分区分配给USB。但是不能把SD卡拔掉～

————————————————————————————————————————

Q：不想用A2SD了该咋办？
A：用adb shell执行a2sd remove。

以下是所有a2sd的命令和注释(用a2sd help命令获得)，使用这些命令前请先对系统以及SD卡做个备份以防万一

Version 2.7.5.1 (2010-09-22)
=================================================
Syntax: /system/bin/a2sd command
All commands create a logfile: /data/dta2sd.log
Command is one of the following
Standard Apps2SD Commands:
--------------------------------------------------
reinstall
Moves free and paid apps to the ext2/ext3/ext4
partition on your secure digital card. Removes
the No A2SD flag file.
This is used if you have already executed an
a2sd remove command. Otherwise, this part is
automatically performed when Apps2SD is
started.
File removed: /data/.noa2sd
remove
Moves free and paid apps to the internal phone
storage. Creates the No A2SD flag file.
File created: /data/.noa2sd
Swap Partition Commands:
--------------------------------------------------
reswap
Removes the No Swap flag. Allows A2SD to
activate the swap partition.
This is used if you have already executed an
a2sd noswap command. Otherwise, this part is
automatically performed when Apps2SD is
started.
File removed: /data/.noswap
noswap
Creates the No Swap flag. Prevents A2SD from
activating the swap partition.
File created: /data/.noswap
swappyxx
Sets swap partition swappiness value to xx.
Example: To set the swappiness of the swap
partition to 30%, type:
a2sd swappy30
To set at 75%, type:
a2sd swappy75
File created: /data/dtswap
Dalvik Cache Commands:
--------------------------------------------------
cachesd
Moves Dalvik cache files to the ext2/ext3/ext4
partition on your secure digital card. Creates
Dalvik Cache to SD flag.
File created: /data/.dalvikcacahe
File removed: /data/.dcpartition
cachesdreset
Performs the same function as cachesd, plus
erases the contents of Dalvik-Cache, forcing
a rebuild on reboot.
File created: /data/.dalvikcache
File removed: /data/.dcpartition
cachepart
Moves Dalvik cache files to the /cache partition
in your phone. Creates Dalvik Cache to Cache
Partition flag.
File created: /data/.dcpartition
File removed: /data/.dalvikcache
cachepartreset
Performs the same function as cachepart, plus
erases the contents of Dalvik-Cache, forcing
a rebuild on reboot.
File created: /data/.dcpartition
File removed: /data/.dalvikcache
nocache
Moves Dalvik cache files to the internal phone
storage. Removes all Dalvik Cache flags.
File removed: /data/.dcpartition
/data/.dalvikcache
nocachereset
Performs the same function as nocache, plus
erases the contents of Dalvik-Cache, forcing
a rebuild on reboot.
File removed: /data/.dcpartition
/data/.dalvikcache
resetcache
Clears the dalvik cache and restarts phone.
Apps2SD Diagnostic Commands:
--------------------------------------------------
check
Performs a symlink and flag file check on your
setup. Outputs a report that shows you if
there are issues with your Apps2SD setup.
repair
Performs a repair of all symlinks based on
flag file activation.
diskspace
Shows disk space statistics for the ext
partition.
sysinfo
Displays information about your phone,
partitions, swap, and more.
Also writes a dump file that has an
entire profile of your phone. This
is for troubleshooting only.
File Created: /data/dtsysdump.txt
swapspace
Shows swap space statistics for all
swap space active on the phone.
partlist
Shows the supported EXT partitions
available for your particular ROM.
ZipAlign Commands:
--------------------------------------------------
align
Performs a one-time zipalign on all APK files
in /data/app, /data/app-private and /system/app.
zipalign
Allows ZipAlign to execute during the boot
process. Creates the ZipAlign flag file.
File Created: /data/.zipalign
nozipalign
Prevents ZipAlign from executing during the
boot process. Removes the ZipAlign flag file.
File Removed: /data/.zipalign
Dalvik Setting Commands:
--------------------------------------------------
jit
Installs DalvikVM JIT.
WARNING: Do not run this command if your phone
has NAND protection active.
nojit
Removes DalvikVM JIT.
WARNING: Do not run this command if your phone
has NAND protection active.
heapsizexx
Sets Dalvik Heap Size to xx, or heapsize0 resets
heap size to default settings.
Ex: If you want to set the Dalvik Heap Size to
24mb, type a2sd heapsize24
File Created: /data/a2sdheapsize (value > 0)
File Removed: /data/a2sdheapsize (value = 0)
Low Memory Killer Commands:
----------------------------------------------------
lowmem-moderate
Sets the internal memory killer to the following
settings:
Foreground Apps: 1536 pages / 6 MB
Visible Apps: 3072 pages / 12 MB
Secondary Server: 4096 pages / 16 MB
Hidden Apps: 7680 pages / 30 MB
Content Provider: 8960 pages / 35 MB
Empty App: 10240 pages / 40 MB
Create File: /data/.lmmoderate
Remove File: /data/.lmoptimum
/data/.lmstrict
/data/.lmaggressive
/data/.lmultimate
/data/.lmextreme
lowmem-optimum
Sets the internal memory killer to the following
settings:
Foreground Apps: 1536 pages / 6 MB
Visible Apps: 2048 pages / 8 MB
Secondary Server: 4096 pages / 16 MB
Hidden Apps: 10240 pages / 40 MB
Content Provider: 12800 pages / 50 MB
Empty App: 15360 pages / 60 MB
Create File: /data/.lmoptimum
Remove File: /data/.lmmoderate
/data/.lmstrict
/data/.lmaggressive
/data/.lmultimate
/data/.lmextreme
lowmem-strict
Sets the internal memory killer to the following
settings:
Foreground Apps: 1536 pages / 6 MB
Visible Apps: 2048 pages / 8 MB
Secondary Server: 4096 pages / 16 MB
Hidden Apps: 15360 pages / 60 MB
Content Provider: 17920 pages / 70 MB
Empty App: 20480 pages / 80 MB
Create File: /data/.lmstrict
Remove File: /data/.lmmoderate
/data/.lmoptimum
/data/.lmaggressive
/data/.lmultimate
/data/.lmextreme
lowmem-aggressive
Sets the internal memory killer to the following
settings:
Foreground Apps: 1536 pages / 6 MB
Visible Apps: 3072 pages / 12 MB
Secondary Server: 4096 pages / 16 MB
Hidden Apps: 21000 pages / 82 MB
Content Provider: 23000 pages / 90 MB
Empty App: 25000 pages / 98 MB
Create File: /data/.lmaggressive
Remove File: /data/.lmmoderate
/data/.lmoptimum
/data/.lmstrict
/data/.lmextreme
/data/.lmultimate
lowmem-extreme
Sets the internal memory killer to the following
settings:
Foreground Apps: 1536 pages / 6 MB
Visible Apps: 3072 pages / 12 MB
Secondary Server: 4096 pages / 16 MB
Hidden Apps: 38400 pages / 150 MB
Content Provider: 40960 pages / 160 MB
Empty App: 43520 pages / 170 MB
Create File: /data/.lmextreme
Remove File: /data/.lmmoderate
/data/.lmoptimum
/data/.lmstrict
/data/.lmaggressive
/data/.lmultimate
lowmem-ultimate
Sets the internal memory killer to the following
settings:
Foreground Apps: 1536 pages / 6 MB
Visible Apps: 3072 pages / 12 MB
Secondary Server: 4096 pages / 16 MB
Hidden Apps: 51200 pages / 200 MB
Content Provider: 57600 pages / 225 MB
Empty App: 64000 pages / 250 MB
Create File: /data/.lmultimate
Remove File: /data/.lmmoderate
/data/.lmoptimum
/data/.lmstrict
/data/.lmaggressive
/data/.lmextreme
lowmem-default
Sets the internal memory killer back to phone default
settings.
Remove File: /data/.lmmoderate
/data/.lmoptimum
/data/.lmstrict
/data/.lmaggressive
/data/.lmextreme
/data/.lmultimate

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