[Norbert]

My 2nd internal HD, both partitions, disappeared after a Time Machine update (I had transferred a lot of files from the Mac HD to the 2nd HD --a Seagate 750 -- since my last update). I had left it to back up and it was frozen when I returned. Had to shut off with switch. The 2nd HD does show up on the Time Machine external drive, and it appears files are in there and readable. But startup is way slower than usual, and the 2nd internal HD is not showing on the desktop, finder Devices, or Disk Utility.
I do periodic manual backups.
Mac Pro Intel, latest Leopard OS

Thanks to anyone who can help!