User`s guide

Chapter XVIII. Unified Boot
Chelsio T5/T4 Unified Wire For Linux Page 385
xxiii. If you have chosen to update option ROM image, then enter the full path to the file. E.g.:- If
the pen drive is device fs0 and the option ROM image file is in fs0:\CHELSIO\cubt4.bin,
then enter CHELSIO\cubt4.bin.