Hardware Components
PCI Cards
Chapter 5
104
PYRO 1394/Firewire Host Controller Card
The PYRO card is Plug and Play, fully IEEE 1394 compliant and provides 3 ports (2
external and 1 internal) at 400 Mbps. The IEEE 1394 standard is supported on Windows
2000 but not on Windows NT 4.0.
For HP-supported drivers for the PYRO card, see the
http://www.hp.com/go/workstationsupport web page. For additional product
information on the PYRO card, see http://www.adstech.com.
Table 5-4
Feature Description
Double Transition
Clocking
Changes the digital protocol to use both edges of the SCSI
request/acknowledge signal clock. Allows designers to use Ultra2 cables.
The signal in an Ultra2 SCSI runs a 40MHz, whereas data runs at only
20MHz or 80MB/sec on a 16-bit wide bus.
Using both edges of the same signal at 40MHz, you can increase the data
rate to 40MB/sec or 160MB/sec on a 16-bit wide bus.
Cyclical Redundancy
Check
Provides extra data protection for marginal cables that are connected to
external devices. The Ultra3 SCSI cyclical redundancy check detects all:
• Single-bit errors
• Double-bit errors
• Odd number of errors
• Burst errors up to 32-bits long
Domain Validation Tests networks, cables, backplanes, terminators, and hard disk drives to
ensure that the environment is operating at required specification. If
reliability is at risk, the transfer speed is lowered.
