I administer a fleet of several hundred Acer C720's and C740's. We maintain a couple of flash drives for reflashing. Recently the C740 drive got lost, so I made a new one using the recovery tool. The model I am using is Acer Chromebook 11 (C740) and the version is 9000.91.0. When I reflash using this drive (Patriot Brand - 16g), the drive is recognized, but the OS isn't recognized, on multiple C740's (I have many that need reflash at this point). I assumed it was a problem with the drive, but I bought a new flash drive (Sandisk Brand - 8g) and see the same result.
Has anyone created a recovery image for a C740 and had it work? I'm beginning to suspect that the repository image has been replaced with a non-working version.