Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 265)

Imagestore 750 User Manual Web Page
Miranda Technologies Inc. Page 265
Warning: Do not power off the device if you see a progress bar. Doing
so will interrupt programming of the CPU FPGA platform
flash, which will render the unit inoperable. Upgrades can
take up to 15 minutes depending on the features and
software versions. The unit will restart automatically.