=============================================================================== MAXTOR 25252A 2.5-Inch SCSI DRIVE =============================================================================== KEY FEATURES: * 12ms average seek * 128K on-board cache * Low power consumption * >350,000 hour MTBF * 1:1 interleave * Automatic actuator lock * Dual drive Master/slave support * Zone density recording * Rotary voice coil SPECIFICATIONS: Formatted (MegaBytes) ...................... 251.7 *5 Number of Disks: ........................... 3 Data Surfaces: ............................. 6 Data Heads: ................................ 6 Servo: ..................................... Embedded Tracks per surface (user) .................. 1,418 Track Density (average) .................... 2,560 tpi Bytes per Block: ........................... 512 Sectors per track (8 Zones) ................ 43-67 Seek times* (ms) Track-to-track ........................... 2.5 Average .................................. 12** Maximum .................................. 22 Average Latency (ms) ....................... 7.064 Rotational speed ........................... 4,247 rpm Controller overhead (ms) ................... 1 Data transfer rate (Mbytes/sec) To/from media ............................ 2.01-3.13 To/from buffer (AT) ...................... 9.0 To/from buffer (synchronous SCSI) ........ 7.5 To/from buffer (asynchronous SCSI) ....... 3.0 Start time - Power up (0-4,247 RPM) Typical .................................. ~3.5 sec Start time - Sleep mode .................... <1.5 sec Start time - Power down .................... ~3 sec Start/Stop cycles (Typical) ................ 50,000 min Interleave ................................. 1:1 Buffer size ................................ 128K Interface .................................. AT or SCSI Recording method ........................... 1,7 RLL Recording density (Kbpi) ................... 55.0 (Zone 1) Flux density (Kfci) ........................ 41.3 (Zone 1) POWER REQUIREMENTS MODE +5VDC±10% POWER ------------------------------------- Spin-up ........ 1000mA (peak). 2.8W Read/Write ..... 400mA ........ 2.0W Idle ........... 320mA ........ 1.6W Park ........... 180mA ........ 0.9W Standby/Sleep .. 20mA ......... 0.1W PHYSICAL Height ................................. 0.67 in. (17.0 mm) Width .................................. 4.00 in. (101.6 mm) Depth .................................. 2.75 in. (69.84 mm) Weight ................................. 0.419 lbs. (190 gm) ENVIRONMENTAL Temperature Operating .............................. 5°C to 50°C Thermal gradient ....................... 20°C/hour max Non-operating, Storage Low Temp ....................... -40°C Per MIL-STD-810E, Method 502.3 High Temp ............................ Per MIL-STD-810E, Method 501.3 Hot induced conditions Humidity Operating .............................. Per MIL-STD-810E, Method 507.3 Natural hig humidity, Cycle 3 Non-operating & storage ................ Per MIL-STD-810E, Method 507.3 Induced conditions, Cycle 5 Altitude (relative to sea level) Operating .............................. -200 to 10,000 feet Non-operating .......................... Per MIL-STD-810E, Method 500.3 low pressure procedure I-storage test condition 2, transport air- craft cargo compartment conditions Shock & Vibration (typical) Non-operating shock .................... 150 Gs, 3 ms & 11 ms half-sine pulse Per MIL-STD-810E, Method 516.4 Procedure VI - Bench Handling Operating shock ........................ 15 Gs, 3 ms & 11 ms half-sine pulse (Without non-recoverable errors) Non-operating vibration Per MIL-STD-810E, Method 514.4, Basic transportation vertical axis PSD profile (60 Min/Axis)(10-500 Hz) Operating vibration Swept sine (1 octave/minute) 5 - 20 Hz ........ 0.05" (double amplitude) 20 - 300 Hz ....... 1 G Peak amplitude Random Vibration .. Per MIL-STD-810E, Method 514.4 Basic transportation vertical axis PSD profile (10-500 Hz) Acoustic Noise (typical) 30 dbA (1 meter in idle on-track mode) sound pressure average 3.40 bel A sound power (per ISO 7779) RELIABILITY AND QUALITY MTBF ....................................... >350,000 POH (Power On Hours) *1 AFR ........................................ ~0.7% (Annualized Failure Rate)*2 Component design life ...................... 5 years (minimum) *3 AOQL/DPM ................................... 1,500 DPM *4 Preventive Maintenance ..................... None Data reliability ........................... <10 per 10 to the 13th bits read (non-recoverable read data errors) * Averages at nominal DC input voltages. Includes mechanical motion and servo overhead. Excludes system, adapter, and interface firm- ware overhead. ** 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. The assumed POH/Year is ~2,500 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. 25252A and 25252S are trademarks of Maxtor Corporation. AT is a registered trademark of IBM Corporation. Specifications subject to change without notice. Copyright 1992 Maxtor Corporation. ==============================================================================