Issue Identification:
Although our investigation is not complete, we’d like to share some initial insight into what we’ve uncovered:
Data writing size & speed: It was discovered that some devices are having trouble accepting the recovery image data being flashed. The blocks of data were too large for some devices to handle, and the memory on the device was having trouble with the speed at which the data was being written. In short, devices were getting too much data, too quickly. This would cause the failure as the new software is corrupted.
Small portion of 520/521 devices affected: As we reviewed logs and worked through issue reproduction, we identified the subset of affected 520/521 devices that may encounter this issue. There is no direct way for an end-user to check their device unfortunately, however it is positive news that not all units would experience this issue.
