Magic Banana said:
"Just start the install over and, at the partitioning menu, define the
partitions. One of them must be mounted at /. "
Fine. In all this process, no one actually said where the "partitioning menu"
is ... and I found it myself in the usual manner: I guessed !
After doing one other critical (?) step: I deleted the root partition in the
USB-attached hard drive (sdb1) using GParted so that it was now just
unallocated space. I selected that empty space and then I clicked the bold
plus sign (_+_) in the little box just under the list of partitions and at
the left of that table, which thereupon produced the missing partition menu.
After that, the installation of Trisquel 7 proceeded just fine, except that
it was impossible to tell if Trisquel was actually going into the correct
hard drive. Even when it asked my name and gave the laptop's name with my
username, I wasn't yet sure whether all was copacetic. Only after rebooting
_without_ the previously USB-attached hard drive plugged in to the USB port
was I sure that it went OK.
Thanks to Magic Banana for this statement: "The installer will take care of
writing the MBR. You do not need to worry about it."
Bear in mind that this might have worked this well because I had invoked the
GPT option previous to this final push.
Tomorrow I'll see if this hard drive, now with Trisquel 7 newly installed,
will work OK in the target desktop PC that I've been piecing together from
various sources.
