Most employers wouldn't rake you over the coals for a simple mishap like this. The drive replacement would be very easy and inexpensive to perform as well as depending on how long you have been issued the system maybe its at the end of the lifecycle and you would be entitled to a faster newer computer as a replacement.
I cooked a work laptop that was a brand new Toshiba Tecra once and was issued a new one. The video games I played on it killed the GPU when the GPU overheated 2 days after getting it. I got a warranty replacement no questions asked and didnt load up any more games on it because the first one was pouring tons of heat out of it and I know I was the cause of its failure.
