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
© 1993 Seagate Technology, Inc. All rights reserved
Publication Number: 36211-001, Rev. A
®
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
H
/ 97H) . . . . . . . . . . . . . . . . . . . . 22
H
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
H
H
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
H
/ 95H / F8H) . . . . . . . . . . . 19
H
/ 98H) . . . . . . . . . . . 23
H
/ 99H) . . . . . . . . . . . . . 24
H
) . . . . . . . . . . . . . . . . . . 25
) . . . . . . . . . . . . . . . . . . 27
) . . . . . . . . . . . . . . . . 28
H
) . . . . . . . . . . . . 29
H
) . . . . . . . . . . . 30
H
) . . . . . . . . . . . . . . . 31
H
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.