Using Disk Utility's Repair Disk Command with Time Machine

I'm trying to figure out whether or not I can use Disk Utility's Repair Disk command on a Time Machine volume. Time machine is taking a very long time to finalize its backups. I don't know if there are directory issues that need to be addressed or if it's due to the very large size of the directory. I've been using Time Machine on this computer since last January and the Time Machine directory takes up over 7 GB of disk space! It's so large that DiskWarrior will no longer work on that volume. DiskWarrior has a limit of 4 GB. I can't be the only one in this situation. I don't want my Time Machine backup to get hopelessly corrupted and then have to start agin. I'm trying to be proactive about correcting any issues before they become serious.

Jon
So far I haven't a clue as to what is wrong, so until a person stumbles in here with one, maybe you could amuse me with as to how you figured how much space the "catalog" is taking. I surely see nothing funny going on my system, although my Time Machine volume is smaller than yours and I might not be looking in all the right places.

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