Compaq Deskpro 2000 Series of Personal Computers C-3

In order to take full advantage of the higher transfer rates, the standard 40-conductor cable must be

replaced with an optional 80-conductor cable. The Compaq Deskpro 2000 Series of Personal

Computers will support up to four mass storage devices. The following table shows the transfer rates

available with the various combinations of devices in combination with the 40-conductor cable and

with the 80-conductor cable:

Table C-2IDE Cable Transfer Rates
Number of Drives 40-Conductor IDE Cable, Length* 80-Conductor IDE Cable**, Length > 14”
Primary Secondary
Primary
Controller
Mode/Speed
Secondary
Controller
Mode/Speed
Primary
Controller
Mode/Speed
Secondary
Controller
Mode/Speed
1 0 2 / 33 MB/s / 2 / 33 MB/s /
2 0 1 / 25 MB/s / 2 / 33 MB/s /
1 1 2 / 33 MB/s 2 / 33 MB/s 2 / 33 MB/s 2 / 33 MB/s
2 1 1 / 25 MB/s 2 / 33 MB/s 2 / 33 MB/s 2 / 33 MB/s
1 2 2 / 33 MB/s 1 / 25 MB/s 2 / 33 MB/s 2 / 33 MB/s
2 2 1 / 25 MB/s 1 / 25 MB/s 2 / 33 MB/s 2 / 33 MB/s
*With 1 drive ≤ 14”; with 2 drives ≤ 18”.
**Ground-signal-ground (GSG) architecture cable.