Originally Posted by tootal2
I thought TiVo hd could not go past 1200 gigabytes
If you have version 11.0h of the TiVo operating system software or more recent version than that--currently it's up to 11.0m--then the TiVo itself can handle partitions larger than 1.2TB, making it possible to use a 2TB drive in an original S3 (TCD648250), or an HD (TCD652160), or HD XL (TCD658000).
I'm not certain, but the MFS Live cd, v1.4 (most recent and almost certainly last ever version) may not be able to handle either drives or partitions over 1.2TB.
WinMFS, however, can, and I've got several S3s with 2TB drives to prove it.
I'm fairly certain someone around here established that any of the S3s will not boot from any drive larger than a 2TB, even if you only use part of it and have no partition over 1.2TB.