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Disc capacity
Disc capacityDisc capacity
Disc capacity
Single layer: Up to 4.7 GB (6 times capacity of CD-ROM)
Double layer: Up to 8.5 GB (12 times capacity of CD-ROM)
Dimensions
Dimensions Dimensions
Dimensions
(W x H x D)
5.9 x 1.7 x 8.0 in (15.0 x 4.4 x 20.3 cm)
Weight
WeightWeight
Weight
(max)
2.6 lb (1.2 kg)
Read speeds
Read speedsRead speeds
Read speeds
DVD+R/-R/+RW/
DVD+R/-R/+RW/DVD+R/-R/+RW/
DVD+R/-R/+RW/
-RW/+R DL /-R DL
-RW/+R DL /-R DL-RW/+R DL /-R DL
-RW/+R DL /-R DL
Up to 8X
DVD-ROM
DVD-ROMDVD-ROM
DVD-ROM
Up to 16X
DVD-RAM
DVD-RAMDVD-RAM
DVD-RAM
Up to 4X
CD-ROM, CD-R
CD-ROM, CD-RCD-ROM, CD-R
CD-ROM, CD-R
Up to 48X
CD-RW
CD-RWCD-RW
CD-RW
Up to 32X
Removable Storage –
Removable Storage –Removable Storage –
Removable Storage –
Media Compatibility –
Media Compatibility –Media Compatibility –
Media Compatibility –
DVD-ROM
DVD-ROMDVD-ROM
DVD-ROM
Media
MediaMedia
Media
Read
ReadRead
Read
Write
WriteWrite
Write
CD-ROM
CD-ROMCD-ROM
CD-ROM
Yes
No
CD-R
CD-RCD-R
CD-R
Yes
No
CD-RW
CD-RWCD-RW
CD-RW
Yes
No
DVD-ROM
DVD-ROMDVD-ROM
DVD-ROM
Yes
No
DVD-ROM DL
DVD-ROM DLDVD-ROM DL
DVD-ROM DL
Yes
No
DVD-RAM
DVD-RAMDVD-RAM
DVD-RAM
Yes
No
DVD+R
DVD+RDVD+R
DVD+R
Yes
No
DVD+R DL
DVD+R DLDVD+R DL
DVD+R DL
Yes
No
DVD+RW
DVD+RWDVD+RW
DVD+RW
Yes
No
DVD-R
DVD-RDVD-R
DVD-R
Yes
No
DVD-RW
DVD-RWDVD-RW
DVD-RW
Yes
No
DVD-R DL
DVD-R DLDVD-R DL
DVD-R DL
Yes
No
Access times
Access timesAccess times
Access times
(typical reads, including
setting)
Random
RandomRandom
Random
DVD: < 140 ms (typical), CD: < 125 ms
(typical)
Full Stroke
Full StrokeFull Stroke
Full Stroke
DVD: < 250 ms (seek), CD: < 210 ms (seek)
Cache Buffer
Cache BufferCache Buffer
Cache Buffer
2 MB (minimum)
Data Transfer Modes
Data Transfer ModesData Transfer Modes
Data Transfer Modes
ATA PIO mode 4 (16.7 MB/s); ATA Multi-word
DMA mode 2 (16.7 MB/s); ATA UltraDMA Mode
3 (44.4 MB/s -default)
Power
PowerPower
Power
Source
SourceSource
Source
SATA DC power receptacle
DC Power Requirement
DC Power RequirementDC Power Requirement
DC Power Requirement
5 VDC ± 5%-100 mV ripple p-p
12 VDC ± 5%-200 mV ripple p-p
DC Current
DC CurrentDC Current
DC Current
5 VDC – <1000 mA typical, < 1600 mA
maximum
12 VDC –< 600 mA typical, < 1400 mA
maximum
Environmental
EnvironmentalEnvironmental
Environmental
(all conditions
non-condensing)
Temperature
TemperatureTemperature
Temperature
41° to 122° F (5° to 50° C)
Relative Humidity
Relative HumidityRelative Humidity
Relative Humidity
10% to 90%
Maximum Wet Bulb
Maximum Wet BulbMaximum Wet Bulb
Maximum Wet Bulb
Temperature
TemperatureTemperature
Temperature
86° F (30° C)
QuickSpecs
HP Compaq dc7800 Business PC
HP Compaq dc7800 Business PCHP Compaq dc7800 Business PC
HP Compaq dc7800 Business PC
Technical Specifications - Optical Storage
DA - 12744 North America — Version 25 — May 16, 2008
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