Installing the D3979A Coax Adapter
To use a BNC coax connection, instead of the RJ-45 connection, a coax adapter (D3979A) is
required. Its installation is described in the
HP Vectra Accessory Service Handbook (5963-
8034), and is indicated in the
HP Vectra PC Service Handbook (Volume 1, 5963-8033).
Switching between the UTP and coax connections is achieved automatically. If both are
connected, and are being used, the UTP connection is given priority, unless specifically
configured by the user.
The adapter draws 200 mA from the main power supply. Consequently, the Remote Power-On
(RPO) facility does not work when using the coax adapter.
The
Network Administrator’s Guide (5964-1467, or online) is a useful source of further
information.
MASS-STORAGE DRIVES
The IDE controller is described in chapter 2. The flexible disk and tape drive controller is
described in chapter 2.
HARD DISK DRIVES
One of the two 3.5-inch hard disk drive, which is characterized in the table below, is supplied
on an internal rear shelf in some models. The lower 3.5-inch front access shelf can be used to
accommodate an extra hard disk drive (such as D2918A, D2929A, D2925A or D2930A).
1.2 GB IDE
850 MB IDE
HP product number
D2930A
D2908-60xxx
Manufacturer
Quantum
Western Digital
Product name
Fireball 1280AT
AC2850
Interface
AT
AT
Random average seek time (read)
11 ms
10 ms
Spindle speed
5400 rpm
4500 rpm
Cylinders
2484
1654
Heads (logical)
16
16
Sectors per track
63
63
Disks
2
2
Heads (physical)
4
4
Tracks per surface
4142
Total tracks
16568
Total user sectors
2 503 872
1 667 232
Bytes per sector
512
512
Formatted storage capacity
1281 MB
853.6 MB
Maximum linear density (fci)
115774
55300
Encoding technology
16/17 PRML
RLL 1.7
Track density (tpi)
4270
4255
Total buffer size
128 KB
128 KB