Is this disk diagnostic anything to worry about?

I'm running a 2011 27" imac. I keep getting this Verify Disk alert on a pretty regular basis. I don't honestly detect any performance issues with the computer. Should I be concerned aboutn this error. I do repair it, but it keeps returning.
Any advice would be welcome. Thanks.

You cannot repair the startup disk from the same start-up disk. Reboot from your install disk (holding down the C key). Once it opens, select your language, and then go to Disk Utility from the Utilities menu. Select your hard disk as before and click Repair.
Once that is complete reboot again from your usual start-up disk.
More useful reading here:
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
http://support.apple.com/kb/TS1417?viewlocale=en_US
For a full description of how to resolve Disk, Permission and Cache Corruption, you should read this FAQ from the X Lab:
http://www.thexlab.com/faqs/repairprocess.html
Apple's advice on general maintenance:
http://support.apple.com/kb/HT1147?viewlocale=en_US

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