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- MICROPOLIS 1568 DISK DRIVE
- SPECIFICATIONS
-
- Unformatted Capacity:
-
- Model Number
-
- 1568-15
-
- Total Mbytes ------------------ 765 ----------------------
- Disk Platters -------------------- 8 ----------------------
- Read/Write Heads ------------------- 15 ----------------------
- Cylinders ----------------- 1632 ----------------------
- Bytes per track ---------------- 31250 ----------------------
-
- Formatted Capacity (typical)
-
- Total Mbytes ------------------ 676 ----------------------
- Bytes per Sector ------------------ 512 ----------------------
- Sectors per Track ------------------- 54 ----------------------
-
- PC Drive Types
-
- If you are using third-party installation software or an on-
- board BIOS on the controller, follow the instructions included
- with the software or controller. Otherwise, examine the entries
- in your system 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 16 msec
- Maximum 35 msec
- Average 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 1632*
- Reduced Write Current Start Cylinder 1632*
- Landing Zone 1632
- 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% 2.0A avg.
- (4.3A max during start-up)
- +5V +/-5% 1.5A avg.
- Heat dissipation, typical 29 Watts
-
-
- 1560-series drives require the use of an ESDI Controller capable
- of a data transfer rate of at least 15 Mbits/sec.
-
- Drive Addressing and Interface Termination
-
- NOT
- USED
- J12 J2 J1 J3
- ____ ________ ___________________ _ _________
- | | | |1| | |1| | | POWER |
- | |_| |____| |_| |_________|
- | |
- | RN11 :::::::: |
- | DDDWWWWW |
- | AAA54321 |
- | 321 |
- | |
- | |
- | |
- | (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
- terminator.
-
- 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 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 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.
-
- * 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
- in out in (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
-
-