SoC：RK3288
Platform：Android 5.1

问题：系统启动卡在Android动画

通过串口助手获取logcat日志：

讯享网

--------- beginning of crash 06-05 09:17:26.406 E/AndroidRuntime( 4564): * FATAL EXCEPTION IN SYSTEM PROCESS: main 06-05 09:17:26.406 E/AndroidRuntime( 4564): java.lang.RuntimeException: Failed to boot service com.android.server.devicepolicy.DevicePolicyManagerService$Lifecycle: onBootPhase threw an exception during phase 480 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:137) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.SystemServer.startOtherServices(SystemServer.java:1107) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.SystemServer.run(SystemServer.java:279) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.SystemServer.main(SystemServer.java:171) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at java.lang.reflect.Method.invoke(Native Method) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:772) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:662) 06-05 09:17:26.406 E/AndroidRuntime( 4564): Caused by: android.database.sqlite.SQLiteDiskIOException: disk I/O error (code 4874) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.sqlite.SQLiteConnection.nativeExecuteForLong(Native Method) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.sqlite.SQLiteConnection.executeForLong(SQLiteConnection.java:596) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.sqlite.SQLiteSession.executeForLong(SQLiteSession.java:652) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.sqlite.SQLiteStatement.simpleQueryForLong(SQLiteStatement.java:107) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.DatabaseUtils.longForQuery(DatabaseUtils.java:845) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.DatabaseUtils.longForQuery(DatabaseUtils.java:833) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.sqlite.SQLiteDatabase.getVersion(SQLiteDatabase.java:864) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:241) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:187) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.LockSettingsStorage.readKeyValue(LockSettingsStorage.java:138) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.LockSettingsService.getStringUnchecked(LockSettingsService.java:353) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.LockSettingsService.getLong(LockSettingsService.java:332) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.internal.widget.LockPatternUtils.getLong(LockPatternUtils.java:1112) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.internal.widget.LockPatternUtils.getKeyguardStoredPasswordQuality(LockPatternUtils.java:830) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.internal.widget.LockPatternUtils.getActivePasswordQuality(LockPatternUtils.java:427) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.devicepolicy.DevicePolicyManagerService.loadSettingsLocked(DevicePolicyManagerService.java:1673) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.devicepolicy.DevicePolicyManagerService.getUserData(DevicePolicyManagerService.java:1091) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.devicepolicy.DevicePolicyManagerService.systemReady(DevicePolicyManagerService.java:1785) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.devicepolicy.DevicePolicyManagerService$Lifecycle.onBootPhase(DevicePolicyManagerService.java:308) 06-05 09:17:26.406 E/AndroidRuntime( 4564): at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:135) 06-05 09:17:26.406 E/AndroidRuntime( 4564): ... 6 more 

一直反复报这样的错误，从log看是操作data分区时出现I/O error，此时怀疑data分区出现了问题，df命令查看data分区，发现data分区已经被填满。

解决：清除data分区垃圾文件，去掉系统后台的logcat日志脚本，该脚本在系统运行过程中一直保存logcat日志到data分区