A collection of findings, documentation, and practical insights into the IBM TS3200 tape library and potentially its siblings based on the BDT FlexStor II platform.
A list of default passwords (including undocumented ones) can be found here.
A dummy card for the iSCSI slot is available here. It also includes the pinout of the service serial port (RJ14).
Instructions for crossflashing firmware can be found here.