NEC POWERMATE VE - SERVICE MANUAL 05-1996 Service Manual page 146

C-4 Hard Disk Drive Specifications and Jumper Settings
Table Appendix C-2 Specifications for 1.2-GB Hard Disk Drive
Features
Bytes per Sector
Maximum Data Rate from Media
Dimensions (H x D x W)
Weight
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:
n
C/D
Master drive, pins 1 and 2 jumpered (factory default)
Slave drive, pins 1 and 2 not jumpered
n
A/C
No functionality, pins 3 and 4 not jumpered
n
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
512
45.4 MB/second
1.0 x 5.75 x 4.00 in. (25.4 x 146.2 x 101.6 mm)
1.3 lb. (589 grams)
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