LIam is right, you have to check that your hardware is correctly installed. The subject line 'Twin DVD drives not mounting' is not really correct. The drives themselves are not 'mounted'. It's the DVD or CD put into the drive that is mounted. with a udf or ISO9600 file system on them. And that is usually done automatically.
The drives have to be 'detected' at boot time, as does all the hardware. Run the command: sudo lshw This will show if the hardware is detected. The bit in my lshw listing that shows it is: *-scsi:1 physical id: 3 logical name: scsi1 capabilities: emulated *-cdrom description: DVD-RAM writer product: DVD-RAM GHC0N vendor: HL-DT-ST physical id: 0.0.0 bus info: scsi@1:0.0.0 logical name: /dev/cdrom logical name: /dev/cdrw logical name: /dev/dvd logical name: /dev/dvdrw logical name: /dev/sr0 version: MA00 capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram configuration: ansiversion=5 status=nodisc because its SATA. If its PATA, it may be different.
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