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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-2
IDE 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.