[Edit:]
Sorry, just noticed in your *original* question you asked about T520...
I believe that for Lenovo Thinkpad T520 you can just stick your System Recovery Disks, boot from it, and it will first wipe clean your SSD partitions, then proceed to restore your system from scratch.
Just a few days ago, I did the same for my T410 Thinkpad, and no extra (unwanted) partition problems on my SSD!
(For the record, I upgraded T410 Win7>>Win10, but Win10 was trick and refused to let me downgrade back to Win7 again.
So I had to resort to use T410 System Recovery Disks, and no extra (unwanted) partition problems!)
========= Original Posting as below=========
Hey frankparisi,
I do not own my T42 anymore, but from what I recall, the T42 and T43 era IBM Thinkpad Recovery Disks may have a bug:
ie: The System Recovery Disks *DOES*NOT* wipe the existing partitions from your SSD before proceeding with System Recovery.
Actually the IBM System Recovery Disks attempts to *ADD* new partitions, without first wiping the SSD clean.
Hence you got more and more disk partitions each successive time you tried to use the IBM System Recovery Disks.
1. If you have an external USB hard drive enclosure and another computer, you can consider to use this free program to erase your notebook SSD of all existing partitions:
http://www.disk-partition.com/free-part ... nager.html
[Disclaimer: I am a fellow Thinkpad user, and have nothing to do with this company!]
2. Then you can use your IBM System Recovery Disks as usual.
3. Back in my T42 IBM Thinkpad days, IBM Thinkpad Technical Support actually gave me a Non-Thinkpad utility: Partition Eraser CD that you must boot up from to zap (delete) all partitions from your SSD, and after which you may start to use your IBM System Recovery Disks.
Good luck!