AOH :: MC1908.TXT|
Micropolis 1908 Drive Specs
MICROPOLIS 1908 DISK DRIVE
Unformatted Capacity: 1908-15
Total Mbytes -------------- 1600 -----------------
Disk Platters ------------------ 8 -----------------
Read/Write Heads ----------------- 15 -----------------
Cylinders --------------- 2112 -----------------
Bytes per track -------------- VARIABLE --------------
Total Mbytes --------------- 1408 -----------------
Bytes per Sector ---------------- 512 -----------------
Sectors per Track -------------- VARIABLE --------------
When using SCSI in a PC, the most common method is to run your
setup program and define No Drives Present. The SCSI Host Adapter
will automatically self-configure on power-up. To install the
drive, follow the manufacturer's instructions to use the on-board
BIOS routine or software that was supplied with the Host Adapter.
Seek Time Adjacent Track 2.5 msec
(including settling time) Average 11.5 msec
Maximum 25 msec
Average Rotational Latency 5.56 msec
Rotational Speed 5400 rpm +/- 0.5%
Data Transfer Rate at Interface
Synchronous Up to 10 Mbytes/sec
Asynchronous Up to 4 Mbytes/sec
Internal Data Rate 30 to 40 MHz
MTBF 150,000 hours
Positioner Fully balanced rotary voice coil
Parking Automatic park and lock
General Functional Specifications
Interface Fast SCSI-2
Supports Full Common Command Set YES
Mounting Plane Any orientation
+12V +/-5% 2.0A Avg
(4.3A max during start-up)
+5V +/-5% 1.5A avg
Power dissipation, typical 24 Watts
7. Drive Addressing and Interface Termination
___________Slave sync(pin 20)
| ________Master sync(pin 16)
| | ______Bus parity check option( 7th set of pins)
| | | _____Write protect option(6th set of pins)
| | || ____Spindle control option(4th set of pins)
| | ||| ___ID2
| | |||| __ID1
| | ||||| _ID0 Pin 1
| | |||||| |
___________ __________________________ ________
_| J2 | | J1 | | J3 |
| |___________|_ |__________________________|___|________|
| W12 : ___________ . W1 |
| |___________| : W2 |
| RN6 |
| W11 |
| Component Side |
ID0, ID1, ID2 SCSI Address Jumpers
The SCSI ID (drive address) jumpers are identified as ID0, ID1,
and ID2. ID selection is binary, as shown in the table below.
Address ID2 ID1 ID0
------- --- --- ---
0 out out out
1 out out in
2 out in out
3 out in in
4 in out out
5 in out in
6 in in out
7 in in in
For multiple drive installations, on one Host Adapter, each drive
must have a unique address. Drives are configured as SCSI ID 7
at the factory.
RN6 Interface Terminator
The Interface Terminator factory installed at RN6 provides
proper termination for the interface lines. When daisy-chaining
multiple drives, leave the terminator installed only in the last
physical drive (or drives) on the daisy chain cable; remove the
terminator from each of the other drives (or the host computer).
Bus Termination Power Option
A jumper is installed at W1, at W2, or at W2 and W12 to select the
source of terminator power (+5V) for the SCSI Bus terminator packs on
the device electronics board.
DO NOT INSTALL JUMPERS AT BOTH W1 AND W12
When a jumper is installed at W1(the factory default configuration),
the drive provides terminator power to it's on-board terminators.
When a jumper is installed at W2 , terminator power is is provided by
the host system via the interface cable J1, pin 26 (TERMPWR).
When a jumper is installl at both W2 and W12, the drive provides
terminator power to its on-board terminators and also to the SCSI bus
via interface cable J1,pin 26(TERMPWR).
Frame Ground Options
Jumper W11 selects the frame ground option.
When W11 is installed, the drive's frame is connected to frame ground.
When a jumper is not installed at W11 (the factory default
configuration), frame ground is not connected to logic ground.
Spindle Control Options
A jumper bridging pins 7 and 8 of J2 (the 4th set of pins)is used to
select the spindle control option.
When a jumper is installed, the drive must wait for an interface Start
Unit command to start the spindle motor.
When a jumper is not installed(the factory default configuration),
the drive automatically starts the spindle motor at power-on
Write Protect Option
A jumper bridging pins 11 and 12 of J2 (the 6th set of pins) is used
to select the write protect option.
When a jumper is installed, the drive is write protected. CAUTION: The
drive can still be formatted.
When a jumper is not installed,(the factory default configuration),
the drive is not write protected.
Bus Parity Option
A jumper bridging pins 13 and 14 of J2(7th set of pins) is used to
select the parity check option.
When a jumper is installed, the drive generates parity but does not detect
When a jumper is not installed,(the factory default configuration),the
drive generates parity and enables parity detection.
Spindle Synchronization Option
The Rotational Position Locking field(MODE SELECT command, Page Code
04h) is used to specify spindle synchronization operation; see
document #110366(Scsi Implementation in Micropolis "MZR" Products) and
ANSI SCSI Standard.
Unsynchronized:If the drive is est to Unsynchronized(PRL=00b), it
ignores the SLAVE SYNC signal.
Slave:If the drive is set to Slave(RPL=01b), it does not generate the
MASTER SYNC signal or the SLAVE SYNC signal but synchronizes its
index to the SLAVE SYNC signal (J2,pin 20) supplied by an external
Master:If the drive is set to MASTER(RPL=10b), it generates the SLAVE
SYNC output signal (j2,pin 20) for use directly by the slave drives.
Master Control:If the drive is set to Master Control(RPL=11b), i
generates the MASTER SYNC signal(j2,pin 20). This output is used by
the controller to generate the SLAVE SYNC signal(J2,pin 20) for the
**** THESE SPECIFICATIONS ARE PRELIMINARY.
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