I newly execute a fresh install of SL and have had a small number of troubles hence far. I erase my old TM backups and in progress a new series; TM appear to work well yet again. In fact, what disturbs me is that while my exterior HD is not connected, I stay getting this message "Time Machine could not absolute the backup. The backup disk is not accessible" each hour or so. Not astonishing on a portable computer, I would state. Is this an suggestion of a trouble with my TM? In case this memo is presently a prompt to support regularly: Is there any way to get rid of it? Thanks for the better suggestion.