The real answer is "it depends", and "however many you want".
Tool's album Opiate has 2 grooves on one side and one on the other. So in that case 3.
One of the disks of Alice in Chains double ablum "Jar of Flies/Sap" only has one groove on one side, and a carved picture on the other. So in this case 1 is indeed the correct answer.
Slashdot Mirror
The real answer is "it depends", and "however many you want".
Tool's album Opiate has 2 grooves on one side and one on the other. So in that case 3.
One of the disks of Alice in Chains double ablum "Jar of Flies/Sap" only has one groove on one side, and a carved picture on the other. So in this case 1 is indeed the correct answer.
Blah. Blah. Blah.