HDD Temperature

I am about to have a second hard drive installed on my "new" computer.
After the first HD was replaced I installed "Hard Disk Sentinal" software
on my computer. Right off the bat the program said that the hard drive
had 10 bad sectors, and about every week I was getting more bad sector
warning. Further the HD running temperature was anywhere from 139 to 155
degrees (F). Western Digital states that the running temp. is 41-165 Deg (F).
It seems to me that these temp. are a bit to high.
Could you tell me if these are normal or should I be concerned.
I have a older computer an do not have the problems I am having
with this Acer computer.

Ralphy