Can I backup the recordings on my eSATA drive and restore it to an eSATA drive of larger size?
This should be possible, but it is untested. As indicated in the previous FAQ, you would backup the contents of the old drive to the new drive using the dd or dd_rescue commands. Once you’ve done that, you would use mfsadd to enable the extra capacity on that drive. Credit to spike2k5 for this answer.