Hard Disk Drive
|Formatted Capacity||1341 MB|
|Average Seek||14.5 msec|
|Single Track||4 msec|
|Rotation Speed / Avg. Latency||3600 rpm +/- 0.5%|
|Transfer Rate to / from media||23.33 Mbits/sec|
|Transfer Rate to / from buffer||N/A|
|Tracks Per Inch (TPI)|
|Bits Per Inch (BPI)|
|Dimensions||8.0"L x 5.75"W x 3.25"H|
|+12V +/-5%||+5V +/-5%||Power|
|Spin up||2.0A (max)|
|Read / Write||4.25A avg||1.5A avg|
|Drive Addressing and Interface Termination
J12 J2 J1 J3
____ ________ ___________________ _ _________
| | | |1| | |1| | | POWER |
| |_| |____| |_| |_________|
| RN11 : : : : : : : : |
| DDDWWWWW W28: |
| AAA 5 4 3 2 1 |
| 3 21 |
| (Component Side) |
The Interface Terminator factory installed at RN11 will provide
proper termination for the interface lines. When daisy-chaining
multiple drives, leave the terminator installed only in the last
physical drive on the daisy chain cable; remove the terminator from
each of the other drives. In most PC/AT installations, the C: drive
is actually at the end of the cable and should retain the
Drive Address Jumpers
The drive address jumpers are identified as DA1,DA2 and DA3.
Address selection is binary, as shown in the table below.
The ESDI controllers's documentation will specify the drive address to use.
"Drive address 0" (no jumper at DA1,DA2, or DA3) is a "deselect"
(i.e., no drive selected).
Drives are factory configured as Drive Address 1.
For many multiple drive installations, each drive must have a unique
address. An exception is that for every drive in a PC/AT
installation, verify that only Drive Address is at DA2; move the
jumper if necessary (the special twisted interface cable that is
generally used takes care of assigning a unique address to each
drive). PC/AT controller can typically support a maximum of two
* W5 selects the spindle a control option. If W5 is installed, The
drive waits for a Start Spindle command (after power is applied) to
start the spindle motor.
If W5 is not installed (the factory default configuration), the
drive automatically starts the spindle motor at power-on. W5 is not
installed for PC/AT applications.
* W1 selects the sectoring mode. If W1 is installed , the drive
operates in the soft-sectored mode.
If W1 is not installed (the factory default configuration), the
Drive operates in the hard-sector mode. W1 is not install for most
PC/AT in applications.
W28 is for the Frame ground option.
When a jumper is installed at W28, frame ground is connected to logic ground.
When a jumper is NOT installed at W28 (the factory default configuration), frame
ground is not connected to logic ground.
* The number of bytes per sector may be specified using the Set
Bytes Per Sector command or by selecting a default sector
configuration with jumpers W2, W3, and W4 as follows:
* This is the default (factory installed) configuration and is
recommended for PC/AT applications