Hard Drive Capacity

[Falcon51]

I have some used hard drives that I'm trying to determine why the label sticker capacity is so much different than what's showing up in windows disk management.
For instance I have a Samsung IDE drive that has 120 GB showing on the label but when I format the drive there is only 111.81 GB showing in disk management. What is the best tool to use to see bad sectors on a hard drive?

[Midknyte]

There's nothing wrong with the drive. check out this link from Best of Data Storage.

Why is my drive displaying a slightly less than expected capacity in Windows or Mac? (http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=615&p_created=1034613413&p_sid=ESxR9pkh&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX 3Jvd19jbnQ9MTEmcF9zZWFyY2hfdHlwZT1zZWFyY2hfZm5sJnB fcHJvZF9sdmwxPSZwX3Byb2RfbHZsMj0mcF9jYXRfbHZsMT0mc F9wYWdlPTEmcF9zZWFyY2hfdGV4dD1taXNzaW5n&p_li=)

It's the difference between decimal and binary.

120 GB 120,000,000,000/1024 = 111.76 GB