After upadting the mark5B software (following the instructions found at http://www.haystack.mit.edu/tech/vlbi/mark5/downloads/Mark5BUpdate.pdf) problems were still seen using scan_check on the 6 TB SATA drives. To correct this, I ipgraded the Mark5B firmware from 12.41 to 15.30, following Dan Smythe's instructions. Several environment variables had to be set and have been included in oper's .bashrc file.
Once these were set, the flash_upgrade was carried out by
This will need to be done for each of the mark5B recorders.