HP nx8420, nw8440 manual Random 110 ms 130 ms Full stroke 210 ms 225 ms

Specifications

Table 6-7

DVD/CD-RW Combo Drive (Continued)

Disc thickness	1.2 mm (0.047 in)
Track pitch	0.74 µm
Access time	CD	DVD
Random	< 110 ms	< 130 ms
Full stroke	< 210 ms	< 225 ms
Audio output level	Audio-out, 0.7 Vrms
Cache buffer	2 MB
Data transfer rate
CD-R (24X)	3,600 KB/s (150 KB/s at 1X CD rate)
CD-RW (10X)	1,500 KB/s (150 KB/s at 1X CD rate)
CD-ROM (24X)	3,600 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	< 15 seconds
Stop time	< 6 seconds

6–10 Maintenance and Service Guide