Jessie (8.0) slow to boot

[Richard Owlett <rowlett@cloud85.net>]

I have Jessie installed on a desktop and a laptop. They both take 
about 105-110 seconds to boot. Squeeze on the desktop takes ~15 
seconds to boot.

Most of the delay seems to be in something that states approximately
"A start job is running for dev-disk-by\x2duuid?????.device (ttttt}"
Where ????? is a long alphanumeric string
      ttttt is a timer display
That is followed by two message identified as "Warning" in bright 
yellow.[they pass by to fast to read].

What's going on?
Are the messages that scroll past preserved anywhere?
TIA