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                            MAXTOR 7213S SCSI DRIVE
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KEY FEATURES:

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

SPECIFICATIONS:

Formatted: ................................. 245,583,872 Bytes
Embedded Controller: ....................... SCSI 
Actuator type: ............................. Voice Coil
Number of Disks: ........................... 2
Data Surfaces: ............................. 4
Data Heads: ................................ 4
Servo: ..................................... Embedded
Tracks per surface: ........................ 1,944
Track Density (average): ................... 2,340 tpi
Bytes per Block: ........................... 512
Sectors per track (5 Zones): ............... 48-72

PERFORMANCE (Average):

Seek times* (ms)
     Track to track: ....................... 3
     Average: .............................. 15 **
     Maximum: .............................. 27

Average latency (ms) ....................... 8.45
Rotation speed ............................. 3,551 RPM
Controller overhead ........................ 1 ms

Data transfer rate (Mbytes per sec)
     To/from media ......................... 2.83
     To/from interface (SCSI) .............. 10.0
Start time / power up (0-3,551 RPM)
     Typical ............................... 6 sec
Stop time / power down
     Typical ............................... 3 sec
Start/stop cycles .......................... 40,000 average
Interleave: ................................ 1:1
Buffer Size: ............................... 64K
Interface: ................................. SCSI
Recording Method: .......................... 1,7 RLL
Recording Density (Kbpi) ................... 42.6 maximum
Flux Density (Kfci) ........................ 31.9 maximum

POWER REQUIRMENTS (Average):

    Mode     +12VDC ±8%   +5VDC ±5%   Power/Duration
    Spin Up   820mA        330mA      <10ms
    R/W       135mA        325mA      3.25 W
    Idle      135mA        315mA      3.15 W

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°C to 50°C
    Non-operating .......................... Low temperature (-40°C) per
                                             MIL-STD-810E, Method 502.3
                                             High temperature per 
                                             MIL-STD-810E, Method 501.3 
                                             Hot induced conditions.
    Thermal gradient ....................... 20°C per hour max
Humidity 
  Operating .............................. Per MIL-STD-810E, Method 507.3
                                           Procedure I, Natural Cycle 3
  Non-operating & storage ................ Per MIL-STD-810E, Method 507.3
                                           Procedure IIb, Induced cycle 5
Altitude (relative to sea level)
  Operating .............................. -200 to 10,000 feet
  Non-operating .......................... Per MIL-STD-810E, Method 500.3
                                           Low pressure (Altitude) procedure I,
                                           Storage, test condition 2
RELIABILITY & MAINTENANCE

MTBF ....................................... >150,000 POH (Power On Hours) *1
AFR ........................................ 1.7% (Annualized Failure Rate)*2
Component design life ...................... 5 years (minimum) *3
Quality Acceptance Rate .................... 99.8% (2,000DPPM) *4
Preventive Maintenance ..................... None
Data reliability ........................... <10 per 10 to the 13th bits read
                                             (hard read errors)
Shock & Vibration (average)
  Shock measured a half-sine pulse. Vibration
  measured at swept sine, 1 octave per minute.

  Non-operating shock .................... 70 Gs, 11 ms
  Operating shock ........................ 15 Gs, 11 ms 
                                           (w/o non-recoverable errors)
  Non-operating vibration
      Per MIL-STD-810E, Method 514.4, Basic transportation vertical axis
      PSD profile, 10-500 Hz, 60 Min/Axis.
  Operating, ramdom vibration
      5 - 20 Hz  ......................... 0.049" (double amplitude)
      20 - 300 Hz ........................ 1.5G Peak amplitude

Acoustic Noise (typical)
      Sound power ......................... 3.9 belA (per ISO 7779)
      Sound pressure ...................... 33 dBA 

     *   At nominal DC input voltages. 
     **  The average of 10,000 random seek times (measured on independent.
         test equipment) constitutes the average seek time specification.
     *1  Annualized average applicable only to the time period after
         installation to the end of the specified Component Design Life.
         assumed POH/year is 2,000 hours.
     *2  Annualized average applicable only to the time period after final
         installation to the end of the specified Component Design Life.
     *3  The period of the before identified wear-out mechanisms will impact
         the annual failure rate.
     *4  Average defects per million rate is measured by our customers 
         through their final installation. Based on failures that are 
         verified as chargeable to Maxtor.
     *5  Maxtor defines a megabyte as 1,000,000.

        7245A and 7245S are registered trademarks of Maxtor Corporation.
               AT is a registered trademark of IBM Corporation.
               Specifications subject to change without notice.
                      Copyright 1993 Maxtor Corporation.
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