seagate ST9100A User manual

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ST9100A

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AT Interface Drive

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Product Manual

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ST9100A

AT Interface Drive

Product Manual

36211-001, Rev. A

27 April 1993

Seagate

, Seagate Technology®, and the Seagate logo are registered trademarks of Seagate Technology, Inc. Other product names are registered trademarks or trademarks of their owners.

Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc.

ST9100A Product Manual, Rev. A iii

Contents

1.0 Specification summary . . . . . . . . . . . . . . . . . . . . 1

1.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . 1

1.2 Physical organizat ion . . . . . . . . . . . . . . . . . . . . 1

1.3 Logical organization . . . . . . . . . . . . . . . . . . . . . 1

1.4 Default logical geometry . . . . . . . . . . . . . . . . . . . 1

1.5 Functional specifications . . . . . . . . . . . . . . . . . . 2

1.6 Physical dimens ions . . . . . . . . . . . . . . . . . . . . 2

1.7 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.8 Spinup times (typical) . . . . . . . . . . . . . . . . . . . . 3

1.9 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.10 Environment . . . . . . . . . . . . . . . . . . . . . . . . 3

1.10.1 Acoustics . . . . . . . . . . . . . . . . . . . . . . . 3

1.10.2 Ambient temperature . . . . . . . . . . . . . . . . . 3

1.10.3 Temperature gradient . . . . . . . . . . . . . . . . . 3

1.10.4 Relative humidity . . . . . . . . . . . . . . . . . . . 4

1.10.5 Altitude . . . . . . . . . . . . . . . . . . . . . . . . 4

1.10.6 Shock . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.10.7 Vibration . . . . . . . . . . . . . . . . . . . . . . . . 4

1.11 Power specifications . . . . . . . . . . . . . . . . . . . . 5

1.11.1 Power management modes . . . . . . . . . . . . . . 5

1.11.2 Power consumption . . . . . . . . . . . . . . . . . . 7

1.11.3 Typical current profiles . . . . . . . . . . . . . . . . 7

1.11.4 Input power noise . . . . . . . . . . . . . . . . . . . 7

1.12 UL/CSA listing . . . . . . . . . . . . . . . . . . . . . . . 8

1.13 FCC verification . . . . . . . . . . . . . . . . . . . . . . 8

2.0 Drive handling and mounting . . . . . . . . . . . . . . . . 11

2.1 Handling and static-discharge precautions . . . . . . . . . 11

iv ST9100A Product Manual, Rev. A

2.2 Mounting the ST9100A . . . . . . . . . . . . . . . . . . 11

3.0 AT interface . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1 Drive configuration . . . . . . . . . . . . . . . . . . . . . 13

3.1.1 Master/slave selection . . . . . . . . . . . . . . . . 13

3.1.2 Remote LED . . . . . . . . . . . . . . . . . . . . . 13

3.2 Onboard drive diagnostics . . . . . . . . . . . . . . . . . 15

3.3 AT bus signal levels . . . . . . . . . . . . . . . . . . . . 15

3.4 AT interface connector . . . . . . . . . . . . . . . . . . . 15

3.5 AT interface cable . . . . . . . . . . . . . . . . . . . . . 16

3.6 AT interface connector pin assignments . . . . . . . . . . 17

3.7 AT interface commands for the ST9100A . . . . . . . . . 18

3.7.1 Standby Immediate (E0

3.7.2 Idle Immediate (E1

3.7.3 Standby (E2

3.7.4 Idle (E3

/ 96H) . . . . . . . . . . . . . . . . . . 20

/ 97H) . . . . . . . . . . . . . . . . . . . . 22

3.7.5 Check Power Mode (E5

3.7.6 Set Sleep Mode (E6

3.7.7 Identify Drive (EC

3.7.8 Set Features (EF

3.7.9 Active Immediate (F9

3.7.10 Idle and Set Idle Timer (FA

3.7.11 Active and Set Idle Timer (FB

3.7.12 Check Idle Mode (FD

/ 94H) . . . . . . . . . . . . 18

/ 95H / F8H) . . . . . . . . . . . 19

/ 98H) . . . . . . . . . . . 23

/ 99H) . . . . . . . . . . . . . 24

) . . . . . . . . . . . . . . . . . . 25

) . . . . . . . . . . . . . . . . . . 27

) . . . . . . . . . . . . . . . . 28

) . . . . . . . . . . . . 29

) . . . . . . . . . . . 30

) . . . . . . . . . . . . . . . 31

3.7.13 Rest/Resume commands . . . . . . . . . . . . . . 32

ST9100A Product Manual, Rev. A v

Figures

Figure 1. Startup and operation current profile for the ST9100A . . 8

Figure 2. ST9100A mounting dimensions . . . . . . . . . . . . . . 12

Figure 3. ST9100A connector setup . . . . . . . . . . . . . . . . 14

Figure 4. AT interface connector dimensions . . . . . . . . . . . . 16

ST9100A Product Manual, Rev. A 1

1.0 Specification summary

1.1 Formatted capacity

Guaranteed Mbytes 85.8 Guaranteed sectors 167,552 Bytes per sector 512

1.2 Physical organization

Read/Write heads 2 Discs 1

1.3 Logical organization

Sectors per track (max) 64 Read/Write heads (max) 16 Cylinders (max) Unrestricted

Note. All head, cylinder, and sector geometries are supported subject

to the maximums specified and to the following condition:

sectors

(

) ×

(heads) × (cylinders) ≤ total sectors per drive

1.4 Default logical geometry

Sectors per track 16 Read/Write heads 14 Cylinders 748

2 ST9100A Product Manual, Rev. A

1.5 Functional specifications

Interface AT Recording method RLL (1,7) Recording density (BPI) 58,200 Flux density (FCI) 43,760 Track density (TPI) 2,650 Spindle speed (RPM) Internal data transfer rate up to 22.4 Mbits/sec (6 zones)—ZBR I/O data transfer rate up to 4 Mbytes/sec Interleave 1:1 Buffer 120 Kbytes

3,545 ± 0.5%

1.6 Physical dimensions

Height (max) 0.504 inches (12.80 mm) Width (max) 2.760 inches (70.10 mm) Depth (max) 4.001 inches (101.85 mm) Weight (max) 4.8 oz (0.136 Kg)

1.7 Seek time

Seek time is a true statistical average (at least 5,000 measurements) of seek time, less controller overhead. All measurements are made with nominal power at sea level and 25°C ambient temperature. Track-totrack seek time is an average of all possible single-track seeks in both directions. Average seek time is measured by executing seek commands between random sector addresses. Full-stroke seek time is one-half the time needed to seek from the first data sector to the maximum data sector and back to the first sector. Host overhead varies between systems and cannot be specified.

Track-to-track

typical avg. (msec) maximum avg. (msec)

5 7

ST9100A Product Manual, Rev. A 3

Average

typical avg. (msec) maximum avg. (msec)

Full-stroke

typical avg. (msec) maximum avg. (msec)

Average latency (msec) 8.46

16 19

26 28

1.8 Spinup times (typical)

Spinup time from Power-on to Ready is 10 seconds (typical). Spinup time from Standby to Ready is 3 seconds (typical).

1.9 Reliability

Nonrecoverable read errors 1 per 1013 bits read Mean time between failures 300,000 power-on hours

(nominal power, at sea level,

25°C ambient temperature) Preventative maintenance None required Mean time to repair 10 minutes Service life 5 years

1.10 Environment

1.10.1 Acoustics

30 dBA maximum (sound pressure) in Idle mode, at 1 meter.

1.10.2 Ambient temperature

Operating 5° to 55°C (41° to 131°F) Nonoperating –40° to 70°C (–40° to 158°F)

1.10.3 Temperature gradient

Operating 30°C/hr max (54°F/hr), without condensation Nonoperating 30°C/hr max (54°F/hr), without condensation

4 ST9100A Product Manual, Rev. A

1.10.4 Relative humidity

Operating 8% to 80% noncondensing;

Max. wet bulb temperature: 40°C (78.8°F)

Nonoperating 8% to 90% noncondensing

Max. wet bulb temperature: 56°C (132°F)

1.10.5 Altitude

Operating –1,000 ft to 10,000 ft (–304.8 m to 3,048 m) Nonoperating –1,000 ft to 40,000 ft (–304.8 m to 12,192 m)

1.10.6 Shock

All shock specifications assume that the drive is mounted in an approved orientation with the shock input levels measured at the drive mounting screws. The nonoperating specifications assume that the read/write heads are positioned in the shipping zone.

Note. At power-down and during Idle and Standby modes, the read/write

heads automatically move to the shipping zone. The head and slider assembly park inside of the maximum data cylinder. When power is applied, the heads recalibrate to track 0.

1.10.6.1 Operating shock

The maximum shock the ST9100A can experience during operation without incurring nonrecoverable data errors is 10 Gs (based on half sine-wave shock pulses of 11 msec).

1.10.6.2 Nonoperating shock

The maximum shock the ST9100A can experience without incurring drive damage or degradation in performance when the drive is subsequent ly put into operation is 150 Gs (based on half-sine shock pulses of 11 msec).

1.10.7 Vibration

All vibration specifications assume that the drive is mounted in an approved orientation with the vibration input levels measured at the drive mounting screws. The nonoperating specifications assume that the read/write heads are positioned in the shipping zone.

ST9100A Product Manual, Rev. A 5

1.10.7.1 Operating vibration

Maximum vibration without drive damage or degradation in performance:

5–22 Hz 0.020-inch displacement (double amplitude) 22–500 Hz 0.5 G acceleration (peak) 500–22 Hz 0.5 G acceleration (peak) 22–5 Hz 0.020-inch displacement (double amplitude)

1.10.7.2 Nonoperating vibration

Maximum vibration without causing physical damage or degradation in performance when the device is subsequently put into operation:

5–22 Hz 0.162-inch displacement (double amplitude) 22–500 Hz 4 Gs acceleration (peak) 500–22 Hz 4 Gs acceleration (peak) 22–5 Hz 0.162-inch displacement (double amplitude)

1.11 Power specifications

The ST9100A receives DC power (+5V), through pin 41 and pin 42 of the AT interface connector; pin 43 is ground.

1.11.1 Power management modes

Power management is required for low-power, portable computer systems. In most systems, you can control power management through the system setup program. The ST9100A features several power management modes, which are described briefly below:

Active mode. The drive is in Active mode during the read/write and seek operations.

Idle-Ready mode. In Idle-Ready mode, the spindle is up to speed and the heads are on track at the last sector accessed. The drive accepts all commands, and returns to Active mode when disc access is necessary.

Idle mode. At power-on, the drive sets the idle timer to enter Idle mode after 5 seconds of inactivity. You can set the idle timer delay using the system setup utility. In Idle mode, the spindle remains up to speed. The heads are parked and latched away from the data zones for maximum

6 ST9100A Product Manual, Rev. A

data safety. The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disc access is necessary.

Standby mode. The drive enters Standby mode when the host sends a Standby Immediate command. The drive can also enter Standby mode after a specifiable length of time has elapsed with the drive in Idle mode. The standby timer delay is system dependent, and is usually established using the system setup utility. In Standby mode, the buffer remains enabled, the heads are parked and the spindle is at rest. The drive accepts all commands, and returns to Active mode any time disc access is necessary.

Sleep mode. The drive enters Sleep mode when a Sleep Immediate command has been received from the host. The heads are parked and the spindle is at rest. The drive leaves Sleep mode when a Hard Reset or Soft Reset command is sent from the host. After a soft reset has been received, the drive exits Sleep mode and enters Standby mode with all current emulation and translation parameters intact.

Rest mode. Some host systems reduce drive power consumption by removing all power from the drive, using a state known as Rest mode. In entering Rest mode, the host saves drive state information (including current logical geometry, set feature parameters, cache status and task file registers) prior to powering down the drive, then restores the drive to its prerest condition once power is restored. Rest mode is implemented using three commands: Rest, Read Drive State, and Restore Drive State. The Rest command prepares the drive for a subsequent Read Drive State command. The Read Drive State command captures the state of the I/O registers and transfers this data to nonvolatile memory within the host. The Restore Drive State command reads the drive state data from memory and restores the drive state based on these data.

Idle and standby timers. The drive sets default time delays for both the idle timer and the standby timer at power-on. In most systems, you can set these delays using the system setup utility. Each time the drive performs an Active function (read, write or seek), the idle timer is reinitialized, and begins the countdown from the specified delay time to zero. If the idle timer reaches zero before any drive activity is required, the drive makes a transition to Idle mode. After making the transition to Idle mode, the drive begins the standby timer countdown. If the standby timer reaches zero before any drive activity is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the drive accepts all commands, and returns to Active mode when disc access is necessary.

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