android OTA升级recovery分区install failed

Question

开机安装recovery patch失败log如下：
02-04 10:44:07.609: E/applypatch(816): GenerateTarget now 5365f3e6
02-04 10:44:07.610: E/applypatch(816): WriteToPartition failed to open /dev/block/bootdevice/by-name/recovery: Read-only file system
02-04 10:44:07.610: E/applypatch(816): GenerateTarget write of patched data to EMMC:/dev/block/bootdevice/by-name/recovery failed
02-04 10:44:07.649: I/recovery(1433): Installing new recovery image: failed

/cache/recovery/下的last_log和last_kmsg都没有问题，也没有像
https://blog.csdn.net/dpppppp/article/details/89228573
这个博主遇到的权限报错问题。

求教大神/dev/block/bootdevice/by-name/recovery: Read-only file system的原因所在

Answer 1

已找到问题，是开机写保护导致