[FAQ10549]OTA升级过程中失败

[FAQ10549]OTA升级过程中失败

2014-05-21

平台MT6572MT6589MT6582MT6592

软件分支JB5JB9JB3JB2...

FAQs 22 of 43

OTA升级不能进入到recovery mode

T卡升级时，在recovery模式下升级完成后将手动重启修改为自动重启

内容

[DESCRIPTION]

 

在OTA升级过程中，在recovery mode中升级失败，从log显示如下：

16535552 bytes free on /cache (35660189 needed)

E:Error in /tmp/sideload/package.zip
(Status 7)
Update.zip is not correct
Installation aborted.

 

[SOLUTION]

 

从log里面就可以看到，16535552 bytes free on /cache (35660189 needed)
这是因为：
 差分升级的方式会从/system copy出要进行升級的档案至 /cache,然后打入patch后再copy回/system,
当要升級的档案大小超过/cache剩余空间,自然就无法完整copy.
以log来看,客户/cache只有30MB,他要升级的档案中最大的size为35660189 bytes,
这已经超过/cache的大小,无法copy过去.

这种情况建议做整包升级，整包升级不会做copy的动作。或者按照如下solution做临时解法：

修改build/tools/releasetools/ota_from_target_files文件,
在如下代码下增加一行。
Old:
 common.ComputeDifferences(diffs)

  for diff in diffs:
    tf, sf, d = diff.GetPatch()
    if d is None or len(d) > tf.size * OPTIONS.patch_threshold:
      # patch is almost as big as the file; don't bother patching
      tf.AddToZip(output_zip)
New
 common.ComputeDifferences(diffs)

  for diff in diffs:
    tf, sf, d = diff.GetPatch()
    if d is None or len(d) > tf.size * OPTIONS.patch_threshold: or sf.size > (30 * 1024 * 1024 * OPTIONS.patch_threshold):
      # patch is almost as big as the file; don't bother patching
      tf.AddToZip(output_zip)

,之后只需要拿整包target files重做出差分包.