Disc Center Hole Diameter
15 mm
Reference Scanning
Velocity
1.2 m/s
Recording/Playing Time
80 minutes with CD-R media
Read Only Disc
Parameters
Formats and Modes
Supported
CD-ROM – Mode 1; CD-ROM XA – Mode 2 (forms 1
and 2); CD digital audio; CD Extra; CD-I – Mode 2
(forms 1 and 2) and CD-I-Ready; Photo CD (single
and multi-session); video CD
Capacity
185 MB (Mode 2, 8cm); 540 MB (Mode 1, 12 cm);
650 MB (Mode 2, 12 cm); 700 MB (Mode 2, 12 cm)
Block Size
Mode 1 – 2,048 and 2,352 bytes; mode 2, form 1 –
2,048; 2,328; 2,336; 2,340 and 2,352 bytes; mode
2, form 2-2,328; 2,336; 2,340 and 2,352 bytes;
CD-DA-2,352 and 2,368 bytes
Writeable Disc
Parameters
Disc Type
CD-R and CD-RW
Write Methods
Disc at Once, Track at Once, Session at Once,
Variable Packet, Fixed Packet
Format and Modes
Supported
CD-ROM (mode 1); CD-ROM XA (mode 2, forms 1
and 2); CD digital audio, CD-I (mode 2, forms 1 and
2); video CD
Capacity
185 MB (Mode 2, 8cm); 540 MB (Mode 1, 12 cm);
650 MB (Mode 2, 12 cm); 700 MB (Mode 2, 12 cm)
Block Size
Mode 1 – 2,048 bytes; mode 2, form 1 – 2,048 and
2,352 bytes; mode 2, form 2 – 2,352 bytes; CD-DA
---2,352 bytes
Access Times
(typical)
Random
< 120 ms
Full Stroke
< 200 ms
Maximum Data Transfer
Rates
CD-RW Write
4800 KB/s (32X) Max
CD-ROM, CD-R read
7200 KB/s (48X) Max
CD-RW read
7200 KB/s (32X) Max
CD-R write
7200 KB/s (48X) Max
Data Transfer Modes
ATA PIO mode 4 (16.7MB/s); ATA multi-word DMA mode 2 (16.7 MB/s); ATA
UltraDMA mode 0 (16.7 MB/s); ATA UltraDMA mode 1 (24 MB/s); ATA UltraDMA
mode 2 (33 MB/s) – default.
Cache Buffer
2 MB (minimum)
Start-up Time
(single)
< 7 seconds typical
Start-up Time
(multi-session)
< 30 seconds typical
Stop Time
< 4 seconds
Power
Source
Four-pin, DC power receptacle
DC power requirement
5 VDC ± 5%—100 mV ripple p-p
12 VDC ± 5%—200 mV ripple p-p
DC current
5 VCD
< 1A (typical)
< 1600 mA (maximum)
QuickSpecs
HP Compaq Business Desktop dx6120 Series
Technical Specifications - Optical Storage
DA - 12243 Worldwide — Version 21 — May 25, 2007
Page 43
