What is the Recovery disk and how does it work?

I see my hard disk has a recovery disk, but I can't imagine how it cam into being. My hard disk was rated at 480 GB from the maker, and I see that 480 is available, plus a recovery disk as well.

Please explain.

Thanks.
HardDiskInfo.tiff
newbiewebSr. Software EngineerAsked:
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Khandakar Ashfaqur RahmanExpert/ConsultantCommented:
This is used to restore factory settings.To check more details:
http://www.ucs.cam.ac.uk/support/winsupuser/recovery
newbiewebSr. Software EngineerAuthor Commented:
Does it use my hard disk for the recovery "partition"?  Is it a partition or what it is exactly?
newbiewebSr. Software EngineerAuthor Commented:
So, the recovery disk comes on the disk itself from the manufacturer? What kinds of settings are stored there? I have installed an OCX SSD into mY MacBook Pro and wider what the  Recovery disk contains. When might I use it?
strungCommented:
It is a separate, bootable partition on your hard drive which was installed when you upgraded to Lion. Since Lion does not come with a DVD, you need the recovery partition to repair or reformat your hard drive or to re-install the system.

Instead of booting to a DVD to do that, as you would have done with all prior systems, you boot to the recovery partition.

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newbiewebSr. Software EngineerAuthor Commented:
That explains why the Apple Store told me I could not buy the bootable Lion jump drive to install Lion onto buy new SSD! (at least I think that explains that :)

They said the only way was for me to bring in the PC so they could install it, which I did.
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