Quantum Fireball 640AT

Disk Drive Configuration

Disks                            1
Heads/Surfaces                   2
Tracks per Surface               4,142
Sectors per Track                95 to 177
Bytes per Sector                 512
Track Density                    4,270
Encoding Method                  16/17 PRML

Performance Specifications

Average Seek                     12 ms
Track-to-Track                   3 ms
Full Stroke                      22 ms
Rotational Speed                 5,400 rpm
Rotational Latencey              5.56 ms
Disk-to-Buffer Data Rate         84 Mb/sec
Buffer Size                      128KB
Host Data Transfer Rate          16.6 MB/sec (PIO Mode 4 / DMA Mode 2)

Environmental Limits

Operating Temperature            0 to 55 degrees C
Non-Condensing Humidity          5 to 85 %
Shock                            10 G, 11ms
Vibration                        1 G, peak-to-peak
Altitude                         -650 to 10,000 ft.
Non-Operating Temperature        -40 TO 75 degrees C
Non-Condensing Humidity          5 to 95 %
Shock                            70 G, 11ms
Vibration                        2 G, peak-to-peak
Altitude                         -650 to 40,000 ft.

Physical Dimensions

Width - inches / mm              4.0 / 101.6
Length - inches / mm             5.75 / 146.1
Height - inches / mm             1.0 / 25.4
Weight - pounds / kg             1.2 / 0.55

Power Specifications

	                +5VDC         +12VDC
Idle                     310 mA        175 mA
Random Seeking           400 mA        670 mA

The following values are used to set the PC/AT CMOS Table:

Cylinder	2484	
Heads		16
Sectors		63
Write Precomp	65535*
Landing Zone	2484

*= The Quantum Fireball II does not require Write Pre compensation, your CMOS setting should be set to reflect that this feature is not enabled. A value of 65535 is a number that many BIOS manufactures use to disable this feature if the value 'none' is not present.

Jumper Settings

The Fireball 640AT has three drive mode jumper options; DS, SP and CS. To configure the drive as:

The SP jumper is only used when the second drive in a two drive configuration does not support DASP. DASP (Drive active / drive 1 present) is a CAM (Common Access Method) defined signal that indicates the presence of a second drive, DASP is used during power on initialization and after a reset. Prior to this definition, products were introduced which did not utilize this method to detect the presence of a second drive. The SP jumper is only used on the MASTER drive, with the DS jumper, when the second drive does not support DASP.

The CS (Cable Select) jumper is only used in systems that support this feature. Cable Select allows for each IDE disk drive to be jumped the same and the position on the cable determines the ID. This requires special cable and both drives on the interface would have to support this feature.

Copyright 1995 Quantum Corporation
500 McCarthy Blvd, Milpitas, CA 95035
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