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- MICROPOLIS 1660 DISK DRIVE
- SPECIFICATIONS
-
- Model Number
- Unformatted Capacity: 1664-7
-
- Total Mbytes --------------- 389.3 -----------------
- Disk Platters ------------------- 4 -----------------
- Read/Write Heads ------------------- 7 -----------------
- Cylinders ---------------- 1780 -----------------
- Bytes per track -------------- 31,832 -----------------
-
-
- Formatted Capacity
-
- Total Mbytes --------------- 344.4 -----------------
- Bytes per Sector ----------------- 512 -----------------
- Sectors per Track ----------------- 54 -----------------
-
- PC Drive Types.
-
-
- If you are using third-party installation software or an board
- BIOS on the controller, follow the instructions included with
- the software or controller. Otherwise, examine the entries in
- your drive table and find the type that most resembles the head
- and cylinder parameters of the drive without exceeding these
- parameters.
-
- Performance Specifications
-
- Seek Time (including settling time) Track-to-Track 4 msec
- Average 14 msec
- Maximum 30 msec
- Avg Rotational Latency 8.33 msec
- Rotational Speed 3600 rpm +/- 0.5%
- Data Transfer Rate 15 Mbits/sec
- MTBF 150,000 hours
- Positioner Fully balanced rotary voice coil
- Parking Automatic park and lock
-
- General Functional Specifications
-
- Interface ESDI
- Sectoring (see W1 description, below) Hard or Soft
- Write Precompensation Start Cylinder 1780 *
- Reduced Write Current Start Cylinder 1780 *
- Landing Zone 1780
- Mounting Plane Any orientation
-
- * These are effectively turned off by specifying a non-existent
- cylinder. Some systems accomplish this by using a value of "-1"
-
- Power Requirements
-
- +12V +/-5% 0.9A Avg
- (2.0A max. during start-up)
- +5V +/-5% 0.7A avg
- Power dissipation, typical 14 Watts
-
- Drive Addressing and Interface Termination
-
- NOT
- USED J2 J1 J3
- ____ ___________ _________________ ________ Power
- | | | |1| | |1| || Power | (under
- | |_| |_____| |_| -------| board)
- | |
- | |
- | Terminator |
- | |
- | |
- | |
- | |
- | |
- | |
- | DA1 |
- | DA2 |
- | DA3 (Component side) |
- | W5 |
- | W4 |
- | W3 |
- | W2 |
- | W1 |
-
- RN1 Interface Terminator
- The Interface Terminator factory installed at RN1 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; 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
- terminator.
-
- DA1, DA2, DA3 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 Select Jumpers
- Address DA3 DA2 DA1
- ------- --- --- ---
- 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
-
- "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 the 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 drives.
-
- W5 Selects the Spindle Control Option.
- 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 installed for
- most PC/AT in applications.
-
- W2, W3, W4 Sector Size and Number Options
- 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:
-
- Jumpers Sectors Bytes/Sector
- W4 W3 W2 Per Track Formatted Unformatted
- --- --- --- --------- --------- -----------
- out out out 53 512 588
- -------------------------------------------------------------
- | * out out in 54 512 576 |
- -------------------------------------------------------------
- out in out 28 1024 1116
- out in in 14 2048 2232
- in out out 7 4096 4464
- ----------------------- RESERVED ----------------------------
- in in out 97 256 321
- in in in 1 31,248 31,248
-
- * This is the default (factory installed) configuration and is
- recommended for PC/AT applications
-