Samsung SH-W08AEN - Manual (Page 18)

When the On/Off light is orange, do not turn the PC off or remove the DVD±R/RW Drive as it may
cause damage in the drive.
How to Use a Horizontally Installed Drive
You can use 3.15 Inch or 4.72 Inch (8cm or 12cm)
discs.
The drive cannot read the disc properly if any part of the
disc is place outside the tray guiding line.
How to Use a Vertically Installed Drive
This drive can be installed vertically.
You can use only the 4.72 Inch(12cm) discs.
(You cannot use the 3.15 Inch(8cm) discs)
The drive cannot read the disc properly if any part of the
disc is place outside the tray guiding line.
How To Use The DVD R/RW Drive