HP Odd DVD Writer 9.0mm Tray, 920417-001 is an optical drive for reading and writing discs in a compatible notebook. The service guide identifies it as a DVD+/-RW Double-Layer SuperMulti writer, giving it support for DVD writing formats that include double-layer media.
Its fixed, serial ATA design uses a 9.0-mm tray-load format. The guide also lists M-disc support. This is a specific replacement part number for the described optical-drive configuration.