Hyper-v 3.0 + CentOS6.3 無法載入掛載光碟機 (出現mount: you must specify the filesystem type)

在Hyper-V 3.0上安裝完CentOS 6.3之後，要再次加戴光碟機內容時
出現 mount: you must specify the filesystem type，上網搜尋得知這個是bug

如要再次加載光碟機內容，需執行以下命令，即可再次加載光碟機了

nsmod /lib/modules/$(uname -r)/kernel/drivers/ata/ata_piix.ko

參考以下來源資訊：
why cant i mount a cd dvd after i install integration services in RHEL?
http://social.technet.microsoft.com/Forums/en-US/linuxintegrationservices/thread/7acc7465-f585-4927-9869-d657ecf0dd48
BUG: After LISv3.1 install I have no cdrom/sr0
http://social.technet.microsoft.com/Forums/en-US/linuxintegrationservices/thread/5a5d17ce-bd03-40fd-bf1e-0afe59493502