Could you try the reports below.
Drives that support writing:
Select tblComputers.Computername, tblComputers.ComputerUnique,
tblComputers.Domain, tblCDROMDrive.Drive, tblCDROMDrive.Caption,
tblCDROMDrive.DeviceID, tblCDROMDrive.Manufacturer, tblCDROMDrive.Capabilities
From tblComputers Inner Join
tblCDROMDrive On tblComputers.Computername = tblCDROMDrive.Computername
Where tblCDROMDrive.Capabilities Like '%4%'
Order By tblComputers.ComputerUnique
Drives that do not support writing:
Select tblComputers.Computername, tblComputers.ComputerUnique,
tblComputers.Domain, tblCDROMDrive.Drive, tblCDROMDrive.Caption,
tblCDROMDrive.DeviceID, tblCDROMDrive.Manufacturer, tblCDROMDrive.Capabilities
From tblComputers Inner Join
tblCDROMDrive On tblComputers.Computername = tblCDROMDrive.Computername
Where tblCDROMDrive.Capabilities Not Like '%4%'
Order By tblComputers.ComputerUnique