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                      MAXTOR CHEYENNE 7120S SCSI DRIVE
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SPECIFICATIONS:

Formatted:  130.4 Million bytes
Embedded Controller:  AT or SCSI
Number of Disks:  2
Data Surfaces:  4
Data Heads:  4
Servo:  Embedded
Tracks per Surface:  1,156
Track Density (average):  1,800 tpi
Track capacity (formatted):  21,504
Bytes per Block:  512
Blocks per drive:  254,688
Sectors per track:  42 physical

PERFORMANCE (Typical):

Seek times* (ms)
     Track to track:       4
     Average:              15
     Maximum:              30

Average latency (ms)       8.55
Rotation speed             3,524 RPM
Controller overhead        1 ms

Data transfer rate (Mbytes per sec)
     To/from media         1.5
     To/from buffer (AT)   6.0
     To/from buffer (SCSI) 5 (sync) 3 (async)

Start time/power up (0 - 3,524 RPM)
     Typical               3 sec
     Maximum               10 sec

Start/stop cycles:         20,000 min

Interleave:                1:1

Buffer Size:               64K

Interface:                 AT or SCSI

Recording Method:          1,7 RLL

Recording density - ID:    34,087 bpi

Flux density - ID (flux reversals per inch):  25,565


POWER REQUIREMENTS (Typical):

MODE		+12V DC +8%         +5V DC +5%          POWER
----            -----------         ----------          -----

Spin-up         800 mA              120 mA              10.2W peak
R/W             200 mA              300 mA              3.9W
Idle            130 mA              105 mA              2.2W 
Standby         2   mA              120 mA              0.6W
Sleep           2   mA              20  mA              0.1W

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
        Operating:         5 degrees C to 50 degrees C
        Non-operating:    -40 degrees C to 65 degrees C
        Thermal gradient:  20 degrees C per hour max

Humidity
        Operating:         8% to 80% non-condensing
        Non-operating:     8% to 80% non-condensing
        Maximum wet bulb:  26 degrees C

Altitude (Relative to sea level)
        Operating         -200 to 10,000 feet
        Non-operating      40,000 feet max


RELIABILITY & MAINTENANCE:

MTBF:    150,000 hours (POH),predicted at 35 degrees C)
MTTR:    30 minutes typical
Preventive maintenance:  None
Component Design Life:   5 years (minimum)

Data Reliability
         Hard read errors     ^10 per 10-13 bits read

Shock and Vibration
         Shock measured at half-sine pulse.  Vibration measured at swept sine,
         1 octave per minute.

         Non-operating shock:       70Gs,  1ms
         Operating shock:           10 Gs, 11ms (without non-recoverable errors)

         Non-operating vibration:   5 - 11 Hz  0.320" (double amplitude)
                                    11 - 300 Hz  2G's, 11 ms (without non-
                                    recoverable errors)

         Operating vibration:       5 - 11 Hz  0.160" (double amplitude)
                                    11 - 300 Hz  1 G peak amplitude

Accoustic Noise
         42dBa max. at 1 meter        

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           Maxtor 7060S/7120S Jumper Designation And Parameters

Ŀ
 Jumper    Pin                     Function                        
 Block   Location                                                  
Ĵ
  J601     1-2                  Terminator Power                   
Ĵ
  J601     3-4       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