HP 4730s LJ525UT#ABA manual DVD-ROM Drive specifications, Applicable disc, Cache buffer

DVD-ROM Drive specifications

Applicable disc	DVD-ROM (DVD-5, DVD-9, DVD-10, DVD-18, CD-ROM (Mode 1 and 2), CD Digital
	Audio, CD-XA ready (Mode 2, Form 1 and Form 2), CD-I (Mode 2, Form 1 and Form
	2), CD-R, CD-RW, Photo CD (single and multisession), CD-Bridge
Center hole diameter	1.5 cm (0.59 in)
Disc diameter
Standard disc	12 cm (4.72 in)
Mini disc	8 cm (3.15 in)
Disc thickness	1.2 mm (0.047 in)
Track pitch	0.74 µm
Access time	CD	DVD
Random	< 100 ms	< 125 ms
Full stroke	< 175 ms	< 225 ms
Audio output level	Line-out, 0.7 Vrms
Cache buffer	512 KB
Data transfer rate
CD-R (24X)	3600 KB/s (150 KB/s at 1X CD rate)
CD-RW (10X)	1500 KB/s (150 KB/s at 1X CD rate)
CD-ROM (24X)	3600 KB/s (150 KB/s at 1X CD rate)
DVD (8X)	10,800 KB/s (1,352 KB/s at 1X DVD rate)
Multiword DMA mode 2	16.6 MB/s
Startup time	< 10 seconds
Stop time	< 3 seconds

124 Chapter 6 Specifications