Seagate ST5660A User manual

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ST5660A
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AT Interface Drive
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Product Manual
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ST5660A
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AT Interface Drive
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Product Manual
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© 1994 Seagate Technology, Inc. All rights reserved
Publication Number: 36242-001, Rev. A
March 1994
Seagate®, Seagate Technology®and the Seagate logo are registered
trademarks of SeagateTechnology,Inc. Otherproductnamesaretrade-
marks or registered 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.

Contents
1.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Functional specifications . . . . . . . . . . . . . . . . . . . 2
1.2.1 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.2 Multisegmented cache buffer . . . . . . . . . . . . . . . 3
1.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Typical power-up and power-down sequence . . . . . . . . . 3
1.4.1 Power-up sequence . . . . . . . . . . . . . . . . . . . 3
1.4.2 Power-down sequence . . . . . . . . . . . . . . . . . . 4
1.4.3 Auto-park . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.6 Physical dimensions . . . . . . . . . . . . . . . . . . . . . 4
1.7 Environmental specifications . . . . . . . . . . . . . . . . . 5
1.7.1 Ambient temperature . . . . . . . . . . . . . . . . . . . 5
1.7.2 Temperature gradient . . . . . . . . . . . . . . . . . . 5
1.7.3 Relative humidity . . . . . . . . . . . . . . . . . . . . . 5
1.7.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.7.5 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.8 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . 6
1.9 DC power . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.9.1 Input noise . . . . . . . . . . . . . . . . . . . . . . . . 6
1.9.2 Power management . . . . . . . . . . . . . . . . . . . 7
1.9.3 Power consumption . . . . . . . . . . . . . . . . . . . 9
1.10 Agency listings . . . . . . . . . . . . . . . . . . . . . . . 11
1.11 FCC verification . . . . . . . . . . . . . . . . . . . . . . 11
2.0 Configuring and mounting the drive . . . . . . . . . . . . . 13
2.1 Handling and static-discharge precautions . . . . . . . . . 13
2.2 I/O cable and connector . . . . . . . . . . . . . . . . . . 14
ST5660A Product Manual, Rev. A iii

2.3 Remote LED connection . . . . . . . . . . . . . . . . . . . 14
2.4 Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.4.1 Jumper sizes . . . . . . . . . . . . . . . . . . . . . . 15
2.4.2 Master/slave configuration . . . . . . . . . . . . . . . 15
2.5 Cable select option . . . . . . . . . . . . . . . . . . . . . . 17
2.6 Mounting the drive . . . . . . . . . . . . . . . . . . . . . . 18
3.0 AT interface . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 ST5660Acommands . . . . . . . . . . . . . . . . . . . . . 21
3.1.1 Identify Drive command (ECH) . . . . . . . . . . . . . 23
3.1.2 Set Features command (EFH) . . . . . . . . . . . . . 25
3.1.3 Sleep command (99H, E6H) . . . . . . . . . . . . . . . 25
3.2 Interface connector pin assignments . . . . . . . . . . . . 25
Appendix. Timing diagrams . . . . . . . . . . . . . . . . . . . . . 27
iv ST5660A Product Manual, Rev. A

Figures
Figure 1. Typical startup current profile . . . . . . . . . . . . . . . 10
Figure 2. AT interface connector . . . . . . . . . . . . . . . . . . 14
Figure 3. Configuration jumpers . . . . . . . . . . . . . . . . . . 16
Figure 4. Connecting cable-selected drives . . . . . . . . . . . . . 17
Figure 5. Mounting dimensions . . . . . . . . . . . . . . . . . . . 19
Figure 6. AT interface connector pin assignments . . . . . . . . . 26
Figure 7. Programmed I/O timing without IORDY . . . . . . . . . . 27
Figure 8. Programmed I/O timing with IORDY . . . . . . . . . . . 28
Figure 9. Multiword DMA timing . . . . . . . . . . . . . . . . . . . 29
ST5660A Product Manual, Rev. A v

1.0 Specifications
1.1 Formatted capacity
The drive was low-level formatted at the factory—you cannot low-level
format it.
You can operate the drive using many different logical configurations,
provided the number of sectors per track does not exceed 63. Three
possible configurations are shown below. The first two configurations
represent conventional CHS addressing as used on most DOS comput-
ers. The third configuration usesLBA addressing.
CHS CHS* LBA**
Cylinders 1,024 1,057 N/A
Heads 16 16 N/A
Sectors 63 63 N/A
Total sectors 1,032,192 1,065,456 1,066,184
Formatted capacity (Mbytes***) 528.48 545.3 545.8
*This is the default configuration. This configuration can only beused
in computers that are capable of addressing more than 1,024 cylin-
ders. Therefore, if your computer cannot address more than 1,024
cylinders, you must changethe configuration using the setup utility.
** This configuration can only be used in computers that support LBA
addressing.
***One megabyte equals one million bytes.
The drive was configured in translation mode at the factory. You can
verify the number of cylinders, sectors per track and headsand the total
numberof LBA sectors by using the Identify Drive (ECH) command.See
Section 3.1.1 for details about the Identify Drive command.
ST5660A Product Manual, Rev. A 1

1.2 Functional specifications
Interface AT (IDE)
Zone Bit Recording method RLL (1,7)
External data burst transfer rate
(Mbytes per sec) 11.1*
13**
Internal data transfer rate
(Mbits per sec) 27 to 48
Spindle speed (RPM) 4,500 ±0.5%
Cache size (Kbytes) 256
Read/write heads 4
Discs 2
Bytes per sector 512
Recording density, max (BPI) 68,000
Track density (TPI) 3,309
*This is the external transfer rate using PIO mode 3 timing.
** This is the external transfer rate using multiwordDMA mode 1 timing.
1.2.1 Seek time
Seek time is measured under nominal conditions of temperature and
voltagewiththe drive mountedhorizontally.Seektimeis atruestatistical
average of at least 5,000 seeks.
Track-to-track seek timeis the averageof all possible single-track seeks
in bothdirections.Averageseek timeis measuredby executingseeks in
both directions between random cylinders. Full-stroke seek time is half
the time needed to seek from track 0 to the maximum track and back to
track 0.
Host overhead varies between systems and cannot be specified. Drive
internal overhead is measured by issuing a no-motion seek and is
typically less than 0.5 msec.
Track-to-track
seek time Average/Typ seek time Full-stroke seek time Average latency
3.5 msec typ
4.0 msec max 12.0 msec read 14.0 msec write 25.0 msec max 6.67 msec
2 ST5660A Product Manual, Rev. A