Phone won't go into Recovery mode: Red ! Triangle. What can I do?

[koam]

Phone won't go into Recovery mode: Red ! Triangle

Nexus 6 with Android 6.0.1
The bootloader is unlocked and the phone is not currently rooted.

I flashed 6.0.1 all stock to the phone. Previously had stock 6.0.0 with TWRP recovery which was installed when I first put 6.0.0 on the phone via NRT. I have manually flashed stock recovery to the phone using a download of the Factory Image from Google and the fastboot flash recovery recovery.img command, which returned successful confirmation messages.

I can boot into fastboot but when I select Recovery, it displays an Android robot on its back open with a red exclamation point triangle.

Other than that, the phone works fine and 6.0.1 is installed with the latest security patch as I wanted.

I want to make it have stock recovery so that future OTA security and updates will install. I'd like to get the stock recovery installed without wiping the data.

 

[koam]

Re: Phone won't go into Recovery mode: Red ! Triangle

My bad. The Android robot with red ! triangle is OK. From there you have to hold Power and press Volume Up until it boots into Recovery mode.

I successfully wiped my cache partition.

The screen reads "Android Recovery" "google/shamu/shamu"
So it should be OK. I'll see in a month if I get the security update.