Disk Utility shows Disk1, not mounted, and no further information???

Disk Utility shows my correct disk partitions in the top section (my hard disk with two partitions and my superdrive). In the lower section, however, there is a "disk1" which shows no information. Under that is another "disk1" which shows only 'Not mounted' for 'Mount Point:' and '0 Bytes' for 'Capacity'. All other lines only show dashes.
I looked at my /Volumes folder in Terminal. It shows four entries:
x MPBWinXP - which is my boot camp partition
x MacBook Pro HD - which is my OS X partition
x MacBackups-1 - which is an external drive on my network (for my Time Machine backups)
x administrator's Public Folder - hunh?
So, this "disk1" in my Disk Utility must represent one of the last two, I'm thinking. And, I'm thinking the last one isn't supposed to be there - or is it there because I shared it at some point, maybe?
Any thoughts on this and what I might do to get rid of the "disk1" from my Disk Utility display?

I never received a reply to this, so I'm marking it as 'answered' just to close it out.

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