android emulator sdk 10 api 29 won't start after remount and reboot

Question

I'm running into strange behaviour when trying to remount device with SDK 10 and API 29, after the remount the emulator hang (device offline) To reproduce:

• OS: MacOs
• Using android studio define new device: pixel 2 (or pixel 3/nexus 5), Android 10.0 x86, API 29
• start the emulator using command line: emulator -avd Pixel_2_API_29_SDK10 -writable-system -verbose
• run adb -s emulator-5554 root
• run adb -s emulator-5554 remount

The adb remmount result failure as follow:
adb remount 
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
W Disabling verity for /system
E Skipping /system
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
W DM_DEV_STATUS failed for scratch: No such device or address
E [liblp]No device named scratch
[liblp]Partition scratch will resize from 0 bytes to 536870912 bytes
[liblp]Updated logical partition table at slot 0 on device /dev/block/by-name/super
[libfs_mgr]Created logical partition scratch on device /dev/block/dm-3
[libfs_mgr]__mount(source=/dev/block/dm-3,target=/mnt/scratch,type=f2fs)=0: Success
Skip mounting partition: /product
Skip mounting partition: /product_services
Using overlayfs for /vendor
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
Skip mounting partition: /product
Skip mounting partition: /product_services
[libfs_mgr]__mount(source=overlay,target=/vendor,type=overlay,upperdir=/mnt/scratch/overlay/vendor/upper)=0
Skip mounting partition: /product
Skip mounting partition: /product_services
/system/bin/remount exited with status 7
remount failed

• run: adb -s emulator-5554 reboot the adb reboot cause the emulator to hang

➜  ~ adb devices
List of devices attached
emulator-5554   offline

Answer 1

I succeded with

adb root
adb shell avbctl disable-verification
adb reboot
adb root
adb remount