Advertisements If you copy the A drive to the new one, when you power up for the first time, you'll be in exactly the same state you would have been had you used the original A drive (with more recording space). You might want to do Guided Setup and take the software upgrade before you move to the new drive - just to be sure your TiVo is OK. Doing this doesn't make the upgrade any more difficult, the MFS Tools transfer will take about the same time either way. I recommend making a backup to put on a CD for additional safety, but it's not a vital step in the upgrade. You can put a small FAT partition on the new drive to make your compressed backup - MFS Tools will steam over the FAT partition when you upgrade. You can modify the MFS Tools pipe to run more quickly: mfsbackup -so - /dev/hdc | mfsrestore -s 127 -r 4 -xpi - /dev/hdb Would only take about 10 minutes - although obviously it doesn't take the recordings.