The S8400 used to come with a PCMCIA to Compact Flash adapter, and depending on which version the prologic was (R9.2 or newer), you could "read" the old translation in. For older CSI proceessors (older than R9), then you had to have a special PCMCIA reader, since the card is a different voltage/format.
Read the S8400 installation and upgrade documents, the proceedure should be shown.
Mitch
AVAYA Certified Expert