mobile phone system updates Some people will soon want to experience the new system, but for some people, upgrading the system is not something to look forward to. However, Android has launched a new feature before, that is, seamless update of A/B partitions.
A / B partition is a mechanism first introduced in Android 7.0. The system exists in both A and B partitions.
A/B partition structure, as the name suggests, divides the system partition into two slots (slots). When the mobile phone starts, slot A or slot B will be selected to start. Only the partition of the current slot is used during operation.
Once there is a problem with the currently running slot, the system can still select another slot to start, thereby ensuring good system availability.
Although Google has been promoting A/B partitions, and even Android 11 wants to force promotion, some OEM manufacturers are not very interested, such as Samsung . Until this year's Galaxy S22 series still does not support A/B partitions, and can only be delayed repeatedly.
adopts an A/B partition structure, which can achieve seamless upgrades. For example, when the user is running slot A and receives OTA push, the system will download OTA data in the background while upgrading slot B at the same time.
When the B slot system is upgraded, the user will receive a restart prompt. At this time, restarting the phone will automatically switch to the new version of the B slot system. During this process, the restart operation will be perceived by the user, and this restart is no different from the time-consuming process of ordinary restarts.
is like when you use your phone, the system can update the background, which can solve the trouble of waiting for update time. It was not used forcibly before.
However, by Android 13, the traditional OTA update mechanism has been deprecated, and new tests have been added to the Vendor Test Suite (VTS), which must support virtual A/B partitions, and these tests have been merged before the official release of Android 13.
so the A/B partition afterwards may become mandatory.
