System Features
Mass Storage Devices
Hard Disk Drives
A 3.5-inch hard disk drive is supplied on an internal shelf in some models. These hard drives can be
provided with the PC. To see which other hard disk drives can be purchased as accessories for the
VL420, refer to
www.hp.com/desktops/products/accessories
.
20GB
Ultra-
ATA 100
40GB
Ultra-
ATA 100
20GB
Ultra-ATA
100
40GB
Ultra-ATA
100
80GB
Ultra-ATA
100
18GB
U160-
SCSI
1
36GB
U160-
SCSI
1
Average Seek Time (ms)
8.9 to 12.1
8.5 to 8.9
9.5
4.5
Track-to-Track Seek TIme (ms)
1.5
1.2
0.95
0.3
Full Stroke Seek Time (ms)
20 to 25
15
-
11
Rotational Speed (RPM)
5400
7200
7200
10000
Buffer Size (MB)
2
2
8
2
1.SCSI is not available for small form factor models.
To find out about Ultra-ATA 100 and U160-SCSI hard disk drive technology, refer to the
Technical
Reference Manual - HP Business PC Technology
.
Floppy Disk Drives
All models are supplied with a 3.5-inch floppy disk drive.
Optical Drives
Desktop and mintower models are fitted with a 48
✕
Max-speed IDE CD-ROM drive. The small form
factor model is fitted with a slim 24X Max-speed IDE CD-ROM drive. These drives can play standard CD-
ROM discs, conforming to optical and mechanical standards as specified in the Red and Yellow Book.
These drives can also be purchased as accessories. Refer to
www.hp.com/desktops/products/accessories
.
To find out about CD-ROM and DVD drive technology, refer to the
Technical Reference Manual - HP
Business PC Technology
.
Minitower and Desktop Drives
Features of the CD-ROM Drive
•
Supported CD-ROM formats:
•
CD-ROM Mode 1 and 2 data disc
•
Photo-CD Multisession
•
CD Audio disc
•
Mixed mode CD-ROM disc (data and audio)
•
CD-ROM XA
•
CD-I, CD-Extra, CD-R, CD-RW.
•
Interface: E-IDE/ATAPI.
product description 23
