just as it is stated in the faq's

Via Hyperterminal, Press q (Enter) to drop to the shell prompt.


Read-write mount the disk drives. Type:
rw (Enter)
rwm (Enter)
There will probably be a pause before the shell prompt appears again.


Copy the files from the second drive to the first drive:
cp -auvfx /drive1/fids /drive0/ (Enter)


Depending on the drives and the amount of data, it might take a surprisingly long time to complete the copy operation. Be prepared for a long wait. Some users have reported that it can take hours.


When it's done, read-only mount the disk drives. Type:
ro (Enter)
rom (Enter)


Log out of the shell and drop back to the player software: logout (Enter)

if memory is correct i usually get the error notice after

Read-write mount the disk drives. Type:
rw (Enter)
rwm (Enter)