===============================================================================
		      MAXTOR 7245S SCSI DRIVE
===============================================================================

KEY FEATURES:

  * 15ms average seek               * 64K on-board cache  
  * Low power consumption           * Zone density recording 
  * 1:1 interleave                  * Dual drive support 
  * Rotary voice coil               * Automatic actuator lock 
  * Single-sided surface mount PCBA

SPECIFICATIONS:

Formatted: ................................. 244,588,030 Million bytes
Embedded Controller: ....................... SCSI
Actuator type: ............................. Voice Coil
Number of Disks: ........................... 2
Data Surfaces: ............................. 4
Data Heads: ................................ 4
Servo: ..................................... Embedded
Track Density (average): ................... 2,340 tpi
Bytes per Block: ........................... 512
Blocks per drive SCSI (User) ............... 480,704
Sectors per track:      Zone 1 ............. 72
			Zone 2 ............. 64
			Zone 3 ............. 60
			Zone 4 ............. 54
			Zone 5 ............. 48

PERFORMANCE (Typical):
					  Typical         Maximum
Seek times* (ms)                          -------         --------
     Track to track: ....................... 3              4
     Average: .............................. 15 **          17
     Maximum: .............................. 27             30
  * includes settling times
Average latency (ms) ....................... 8.45
Rotation speed ............................. 3,551 RPM

Data transfer rate (Mbytes per sec)
     To/from media 
      Zone 1 ............................... 2.83
      Zone 2 ............................... 2.58
      Zone 3 ............................... 2.40
      Zone 4 ............................... 2.20
      Zone 5 ............................... 1.81

To/from interface ................ 5 sync, 3 asyn, 10 fast SCSI
Start time / power up (0-3,551 RPM)
     Typical ............................... <=6 sec   10 sec max
Stop time / power down
     Typical ............................... <=3 sec    5 sec max
Start/stop cycles .......................... 20,000 typical
Interleave: ................................ 1:1
Buffer Size: ............................... 64K
Interface: ................................. SCSI 
Recording Method: .......................... RLL
Recording Density (kbpi) ................... 42.6 maximum
Flux Density (kfci) ........................ 32.0 maximum

Power Requirments (Typical):

    Mode     +12VDC +-8%  +5VDC +-5%  Power
    ----------------------------------------    
    Spin-up   847mA        328mA      N/A
    Seek      243mA        200mA      3.92W
    R/W       150mA        348mA      3.55W

Physical:

    Height:  1.00"  (2.54 cm)
    Length:  5.75"  (14.61 cm)
    Width:   4.00"  (10.16 cm)
    Weight:  1.2 lbs. (.57 kg)

Environmental:

Temperature (Degrees C)
    Operating .............................. 5 to 50
    Non-operating .......................... -40 to 65
    Thermal gradient ....................... 20 per hour max
Humidity ***
    Operating .............................. 5% to 95% non-condensing
    Non-operating .......................... 5% to 95% non-condensing
    Maximum wet bulb ....................... 20 degrees C 
Altitude (relitive to sea level)
    Operating .............................. -200 to 10,000 feet
    Non-operating .......................... 40,000 feet max
    
Reliability and Maintenance:

MTBF ....................................... >150,000 hours 
					     (POH, predicted at 35 degrees C)
Preventative Maintenance ................... None
Component design life ...................... 5 years (minimum)
Data reliability
     Hard read errors ...................... <10 per 10^13 bits read
Shock & Vibration (typical)
	  Shock measured at half-sine pulse. Vibration 
	  measured at swept sine, 1 octave per minute
    Operating shock ........................ 10 Gs, 11ms
    Non-operating shock .................... 70 Gs, 11ms (without 
					     non-recoverable errors)
    Operating Vibration 
    5-20 Hz ................................ .05" (double amplitude)
    20 - 300 Hz ............................ 1 Gs peak amplitude
Acoustic Noise
    35 dBA at 1 meter (typical) in idle (spinning) on track mode.
    (sound power -4.5 bels average)

*   At nominal DC input volages
**  The average of 10,000 random seek times (measured on independent
    test equipment) consitutes the average seek time specification.
*** Operating and non-operating specs meet MIL-STD-810E. 
    Method 507.3 Table 507.3-I High humidity diurnal catagory. 
    Natural, High Humidity, Cyclic (Cycle 3)


 7245S are trademarks of Maxtor Corporation.
Specifications subject to change without notice.
============================================================================= 
		7245S Factory default jumper settings

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\//\/\/\/\/\/\/\/\/\
                                                          
                                                        
                                                          
Ŀ                                                       
                                                 Ŀ    
                                                 ..J305
                           1  2  3  4          ..J306Ŀ
                            0  0  0  0          ܳJ307 
                             3  3  3  3          ܳJ308 
                            J  J  J  J          ..J309 
                          Ŀ             
                                :  :                   
                                         
                                                     
                    RP302            RP301               
                    .   .        
                               
                                                           
Ĵ
 .       J2     .                J1                       

Pin 1             Pin 1

===============================================================================

	   Maxtor 7245S Jumper Designation 

Ŀ
 Jumper                        FUNCTION                         
 Block                                                          
Ĵ
  J301                       Terminator Power                   
Ĵ
  J302                       Power Up Option                    
Ĵ
  J303                        Disable Parity                    
Ĵ
  J304                           Reserved                       
Ĵ
  J305                           Reserved                       
Ĵ
  J306                          reserved                        
Ĵ
  J307          Target ID Address (Most Significant Bit - MSB)  
Ĵ
  J308                       Target ID Address                  
Ĵ
  J309          Target ID Address (Least Significant Bit - LSB) 


    (Shown with Factory Default jumper settings)


       Ŀ
        SCSI  Priority    J307       J308        J309   
         ID                                             
       Ĵ
         0     Lowest       O          O          O     
       Ĵ
         1                  O          O          J     
       Ĵ
         2                  O          J          O     
       Ĵ
         3                  O          J          J     
       Ĵ
         4                  J          O          O     
       Ĵ
         5                  J          O          J     
       Ĵ
         6                  J  *       J *        O     
       Ĵ
         7    Highest       J          J          J     
       
       O=OPEN J=JUMPERED
       * Factory Default Settings


BASIC SCSI INSTALLATION STEPS

- Drive is shipped with an ID of 6 to provide spare jumpers.
  Choose address jumpers according to specific installation requirments.

- The last physical device on the SCSI bus must be terminated.
  Any other SCSI device connected between the host and the device at
  the end of the bus must NOT be terminated.

- Install a 50-pin ribbon connector. The striped edge of the 50-pin ribbon 
  cable represents pin 1 and must be oriented towards pin 1 at the drive 
  connector and the host connector.

- Install the DC power connector.

- Secure the drive in a bay with 6-32 x 1/4" screws.

- Set the drive type in the AT BIOS setup to "NOT INSTALLED". 
  Note: This intelligent drive will identify itself to the system and 
  SCSI host adaptor.

- The drive is now ready for partitioning and high-level formatting
  with any operating system. For example:

    Partition the drive using the FDISK program from MS-DOS 
    version 3.3 or higher.

    High-level format the drive using the FORMAT command from 
    MS-DOS version 3.3 or higher.



Revision A                                       Sandoval/Anderson
10/07/93
     
