NEC POWERMATE VE - SERVICE MANUAL 08-1996 Service Manual page 139

C-2 Hard Disk Drive Specifications and Jumper Settings
Table C-1 Specifications for 1.2-GB Hard Disk Drive
Features
Performance
Track-to-track seek
Average seek
Maximum seek
Average Latency
Rotation Speed
Data Transfer Rate
Buffer to Disk
Buffer to Host
Start/Stop Cycles
Buffer Size
Interface
The drive uses one jumper block (JP7) to configure the master/slave and cable select
options of the hard drive. Jumper block JP6 has three user-selectable jumper settings: C/D
(master/slave select), A/C (no functionality), and CS (cable select). The remainder of the
jumpers are reserved for factory use. The user selectable jumpers and their settings are as
follows:
T
C/D
Master drive, pins 1 and 2 jumpered (factory default)
Slave drive, pins 1 and 2 not jumpered
T
A/C
No functionality, pins 3 and 4 not jumpered
T
CS
Cable select disabled, pins 5 and 6 not jumpered (factory default)
Cable select enabled, pins 5 and 6 jumpered.
Western Digital WDAC21200 1.2-GB Hard Disk Drive
3.0 ms
14 ms
26 ms
8.3 ms
3600 rpm
45.4 MB/s maximum
16.6 MB/s, Mode 4
40,000 minimum
64 KB
IDE