Just a suggestion. Why not buy a separate CD-RW and DVD-ROM drives? Cost diff will be about Rs. 100-200. But you will get separate drives.
Here're the advantages IMHO
1. Copying CD to CD is faster with 2 drives

2. If one goes out of order and you send it for repairs, at least the other one is there.
3. If one goes kaput, you have to replace only that one. Cheaper. Isn't it?
4. Depreciates less becuase you use both and for a little extra sum you get 2 CD lenses, etc. Looks like better value for money to me.