HP DV6 750-GB 640-GB 500-GB 320-GB 250-GB Logical blocks, Disk rotational speed, Access time

	1-TB*	750-GB*	640-GB*	500-GB*	320-GB*	250-GB*
Logical blocks	1,953,504,	1,465,128,3	1,250,242,8	976,752,24	625,121.43	488,376,12
	479	59	67	0	3	0
Disk rotational speed	5200 rpm	5200 rpm	7200 and	7200 rpm	7200 rpm	7200 rpm
			5400 rpm
Operating temperature			5°C to 55°C (41°F to 131°F)

*1 GB = 1 billion bytes when referring to hard drive storage capacity. Actual accessible capacity is less. Actual drive specifications may differ slightly.

NOTE: Certain restrictions and exclusions apply. Contact technical support for details.

Blu-ray ROM with LightScribe DVD±RW Super Multi Double-Layer Drive specifications

Applicable disc	Read:	Write:
	BD-ROM, BD-ROM-DL, BD-R, BD-R-DL,	DVD-RAM (Ver.2), DVD+R, DVD-R, CD-
	BD-RE, BD-RE-DL, DVD-ROM, DVD+R,	R, and CD-ROM
	DVD+R-DL, DVD+RW, DVD-R, DVD-R-DL,
	DVD-RW, DVD-RAM (Ver.2), CD-DA,
	CD-ROM (mode 1 and mode 2), CD-
	ROM XA (mode 2, form 1 and form 2),
	Photo CD (single and multiple sessions),
	CD Extra, CD-R, CD-RW, and CD-TEXT
Access time	BD	DVD
Random	< 230 ms	< 180 ms
Cache buffer	4.5 MB
Data transfer rate
2X BD-RAM	9 MB/sec
8X DVD	2,400 KB/sec
16X CD-R	2,400 KB/sec
16X CD-RW	2,400 KB/sec

96 Chapter 6 Specifications