Formatting one partition on external harddrive

Hello everyone,

here's the situation;

I have an external hard drive with two partitions. I made the mistake of connecting mt Ext HDD to a friend's windows computer and since then one of the Partitions (I think Fat32) cannot be read on any of my macs. It used to work flawlessly earlier.

My simple questions is, Can i use disk utility to erase and re-format that partition ?

Basically a lot of space on my HDD is wasted and i want put it to use again without Deleting or formatting the partition that works.

All help will be much much appreciated.
Grazie

p.s. i googled but couldn't find a proper answer.

 

thanks for your reply.

But once again.

The HDD has 2 partitions

Partition A
Partition B.

Partition A is cool i want to keep the data on it.
PArtition B is the bad one which doesn't show any data.

I want to erase and reformat ONLY partition B so i can put new data on it
while keeping PArtition A as it is.

Is this possible ? and can i use disk utility for this ?

thanks for your help everyone

 

Did this Worked Flawlessly in 2 seconds.
Thank you much