System Image and System Partiton

[hecksagon]

On M TWRP now shows a system partition and system image. Both take up approximately 2gb of storage. What purpose does this serve? Before M I just had a system partition.

 

[danarama]

If you're talking about the backup options in TWRP, it's nothing to do with M.. TWRP added the option to make a dump of the stock rom into a system image instead of a back up image (for fastboot flashing) The option is there regardless of what rom you are on.

The option is pointless for nexus users.

 

[hecksagon]

If you're talking about the backup options in TWRP, it's nothing to do with M.. TWRP added the option to make a dump of the stock rom into a system image instead of a back up image (for fastboot flashing) The option is there regardless of what rom you are on.

The option is pointless for nexus users.

Ah I see. Should have read TWRP's release notes. So in most cases you would chose one or the other, probably just a system partition backup? Choosing both would just inflate the backup without any addition benefits.

 

[danarama]

Ah I see. Should have read TWRP's release notes. So in most cases you would chose one or the other, probably just a system partition backup? Choosing both would just inflate the backup without any addition benefits.

A normal backup would be system and not system image.

System image would be used once before you flashed your first custom rom, so you could create a flashable stock image.. But we would never need that on this device.. The option is superfluous.