QuickSpecs

HP Compaq dc7800 Business PC

Technical Specifications - Optical Storage

PATA CD-RW/DVD-ROM Height

12.7mm height slim CD-RW

Combo Slim Drive

Orientation

Either horizontal or vertical

 

 

 

 

Interface type

PATA/ATAPI

 

 

Disc capacity

Single layer: Up to 4.7 GB (6 times capacity of CD-ROM)

 

Dimensions (W x H x D) 5.0 x 0.5 x 5.0 in (128 x 13.6 x 129 mm)

 

Weight (max)

0.42 lb (190 g)

 

 

Write speeds

CD-R

Up to 24X

 

 

CD-RW

Up to 24X

 

Read speeds

DVD+R/-R/+RW/

Up to 4X

 

 

-RW/+R DL /-R DL

 

 

 

DVD-ROM

Up to 8X

 

 

CD-ROM, CD-R

Up to 24X

 

 

CD-RW

Up to 24X

 

Access time

Random DVD

DVD: < 140 ms (typical), CD: < 125 ms

 

(typical reads, including

 

(typical)

 

settling)

Random CD

DVD: < 250 ms (typical), CD: < 210 ms

 

 

 

 

 

(typical)

 

 

Cache Buffer

2 MB (minimum)

 

 

Data Transfer Modes

ATA PIO mode 4); ATA Multi-word DMA mode

 

 

 

2; ATA UltraDMA mode 0; ATA UltraDMA mode

 

 

 

1, mode 2; ATA UltraDMA Mode 3 (default)

 

Power

Source

Four-pin, DC power receptacle

 

 

DC Power Requirement

5 VDC ± 5%-100 mV ripple p-p

 

 

DC Current

5 VDC (< 1000 mA typical, < 1600 mA

 

 

 

maximum)

 

 

Total Drive Power

< 2.5 Watt

 

 

(standby mode)

 

 

Audio output level

0.7 Vrms (typical)

 

 

Environmental (all

Temperature

41° to 122° F (5° to 50° C)

 

conditions non-

Relative Humidity

5% to 85%

 

condensing)

 

Maximum Wet Bulb

86° F (30° C)

 

 

Temperature (operating)

DA - 12744 North America — Version 25 — May 16, 2008

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HP Gtech G-Technology G-Drive Mobile 1 Tb External Hard Drive DC7800 Pata CD-RW/DVD-ROM Height, Access time Random DVD