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ST39102FC,Cheetah 18FC ST118202FC,Cheetah 9LP ST39102FC
Product Manual
76 pgs553.58 Kb0

Seagate ST39102FC,Cheetah 18FC ST118202FC,Cheetah 9LP ST39102FC Product Manual

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Cheetah 9LP FC Disc Drive
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ST39102FC
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Product Manual, Volume 1
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Cheetah 9LP FC Disc Drive
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ST39102FC
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Product Manual, Volume 1
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© 1997, 1998 Seagat e Technology, Inc. All rights reserved November 1998
Publication number: 83329350, Rev. C
No part of this publication may be reproduced in any form without written permission from
Seagate Technology, Inc.
Printed in the United States of America
Revision status summary sheet
Revision Date Writer/Engineer Sheets Affected
A 06/01/98 L. Newman/P. Kassel 1/1, v-viii, 1-64. B 07/24/98 L. Newman/P. Kassel 4, 6, 7, 9, 10, 13, 14, 15, 19, 23, 30, 34, 38,
41, 46, 49, and 52.
C 11/05/98 L. Newman/P. Kassel 7, 13, 14, 17, 20, 30, 53, 55, 56, and 57.
Cheeta h 9LP FC Product Manual, Rev . C v
Contents
1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 Applicable standards and reference documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1 Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.0 General descr iption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Media description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.4 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.5 Unformatted and formatted capacit ies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6 Factory-installed accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.7 Factory-installed options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.8 User-installed accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.0 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Internal drive characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Seek performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.1 Access time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.2 Format command execution time for ≥ 512-byte sectors . . . . . . . . . . . . . . . . . . . . . 9
4.2.3 General performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4 Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5 Cache operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0
4.5.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.0 Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.1 Environmental interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.2 Interface errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.3 Write errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.4 Seek errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3 Reliability and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
5.3.1 Mean time between failure (MTBF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.2 Field failure rate vs time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.3 Preve ntive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.4 Service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.5 Service philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.6 Service tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.7 Product warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.8 Hot plugging the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 AC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 DC power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2.1 Conduct ed noise immu nit y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.2 Power seq uencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.3 Current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.3 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.4 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.4.3 Effective altitude (sea level reference) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
vi Cheetah 9LP FC Product Manual, Rev. C
6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
6.5 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.6 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.7 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
7.0 Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.1 Drive internal defects/errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.2 Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
7.3 FC-AL system errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
8.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
8.1 Drive ID/option selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
8.2 LED connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
8.2.1 J6 connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
8.3 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
8.4 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
8.4.1 Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
8.5 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
8.6 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1
9.0 Interface requiremen ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
9.1 FC-AL features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
9.1.1 Fibre Channel link service frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
9.1.2 Fibre Channel task m anagem ent functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
9.1.3 Fibre Channel task m anagem ent respo nses . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
9.1.4 Fibre Channel port login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
9.1.5 Fibre Channel port login accept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
9.1.6 Fibre Channel Process Logi n (PRLI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
9.1.7 Fibre Channel Process Accep t (ACC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
9.1.8 Fibre Channel fabric login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
9.1.9 Fibre Channel fabric accept login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
9.1.10 Fibre Channel Arbitrated Loop options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
9.2 Dual port support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
9.3 SCSI commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
9.3.1 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
9.3.2 Mode Sense data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
9.4 Miscellaneous operating features and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
9.5 FC-AL physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
9.5.1 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
9.5.2 Connector requirem ents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
9.5.3 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
9.5.4 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
9.5.5 FC-AL transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
9.5.6 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
9.5.7 Fault LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
9.5.8 Active LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
9.5.9 Enable port bypa ss signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
9.5.10 Motor start controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
9.5.11 SEL_6 through SEL_0 ID lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
9.6 Signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.6.1 TTL input characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.6.2 LED driver signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.6.3 Differential PECL output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
9.6.4 Differentia l PECL input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
10.0 Seagate Technology support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Cheeta h 9LP FC Product Manual, Rev . C vii
List of Figures
Figure 1. Cheetah 9LP FC family disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Cheetah 9LP FC disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Typical Cheetah 9LP FC drive +12V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 4. Mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 5. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 6. LED indicator connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 7. Air flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 8. PCBA temperature measurement locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 9. HDA case temperature measurement location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 10. Physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 11. Port bypass circuit physical interconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 12. FC-AL SCA device connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 13. J6 connector dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 14. FC-AL transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 15. Transmit eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 16. Receive eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Cheeta h 9LP FC Product Manual, Rev . C 1
1.0 Scope
This manual describes Seagate® Cheetah 9LP FC (Fibre Channel) disc drives. Cheetah 9LP FC drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifica-
tions to the extent described in this manual. The
Fibre Channel Interface Manual
(part number 77767496) describes the general Fibre Channel Arbitrated Loop characteri stics of this and other Seagate Fibre Channel drives.
Figure 1.
Cheetah 9LP FC
family disc drive
Cheeta h 9LP FC Product Manual, Rev . C 3
2.0 Applicable standards and reference documentation
The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends upon its hos t equipment to provide adeq uate power and environment in order to a chieve opti­mum performance and compliance with applicable industry a nd governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regu­lation. In par ticular, the drive must be securely m ount ed in o rder to guarante e th e spec ified pe rformanc e char­acteristics. Mounting by bottom holes must meet the requirements of Section 8.5.
2.1 Standards
The Cheetah 9LP FC family complies with Seagate standards as noted in the appropriate sections of this man­ual and the Seagate
Fibre Channel Interface Manual
, part number 77767496.
The Cheetah 9LP FC disc drive is a UL recognized component per UL1950, CSA certified to CAN/CSA C22.2 No. 950-95, and VDE certified to VDE 0805 and EN60950.
2.1.1 Electromagnetic compatibility
The drive, as delivered, is designed f or s ystem integr ation and installation into a suitable enclosure prior to use. As such the drive is supplied as a subassembly and is not subjec t to Subpart B of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.
The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable shielding. As such, the drive is capable of meeting the Class B limits of the FCC Rules and Regula­tions of the Canadian Department of Communications when properly packaged. However, it is the user’s responsibility to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O cables may be required if the enclosure do es not provide adeq uate shielding. If the I /O cables are extern al to the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con­troller.
2.1.1.1 Electromagnetic susceptibility
As a component assem bly, the drive is not required to me et any suscep tibility perform ance requi rements. It is the responsibility of those integrating the dri ve within their systems to perform t hose t ests req uired a nd des i gn their system to ensure that equipm ent operating in the same system as the drive or external to the system does not adversely affect the performance of the dr ive. See Section 5.1.1 on page 13 and Table 1, DC power requirements, on page 19.
Electromagnetic compliance Seagate uses an independ ent laboratory to confirm compliance with the directives/standards for CE Marking
and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected sys­tem represents the most popular characteristics for test platforms. The system configurations include:
• 486, Pentium, and PowerPC microprocessors
• 3.5-inch floppy disc drive
• Keyboard
• Monitor/display
• Printer
• External modem
•Mouse Although the test system with this Seagate model complies with the directives/standards, we cannot guarantee
that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance and provide the appropriate marking for their product.
Electromagnetic compliance for the European Union
If this model has the CE Marking it complies with the European Union requirements of the Electromagnet ic Compatibility Directive 89/336/EEC of 03 M ay 198 9 as amended by Directive 92/31/EEC of 28 April 1992 a nd Directive 93/68/EEC of 22 July 1993.
4 Cheetah 9LP FC Product Man ual , Rev. C
Australian C-Ti ck
If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995 and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Man­agement Agency (SMA).
2.2 Reference documents
Cheetah 9LP FC Installation Guide
Seagate part number: 83329340
Fibre Channel Interface Manual
Seagate part number: 77767496
ANSI Fibre Channel Documents
X3.230-1994 FC Physical and Signaling Interface (FC-PH) X3.297.1997 FC-PH-2 Fibre Channel Physical and Signaling Interface-2 X3.303.199X FC-PH-3 Fibre Channel Physical and Signaling Interface-3 X3.272-1996 FC Arbitrated Loop (FC-AL) X3.269-1996 Fibre Channel Protocol for SCSI (FCP) NCITS TR-19 Private Loop SCSI Direct Attach NCITS TR-20 Fabric Loop Attachment (FC-FLA) SFF-8045 Specification for 40-pin SCA-2 Connector with Parallel Selection. SFF-8067 Specification for 40-pin SCA-2 Connector with Bidirectional Enclosure Services
Interface.
ANSI Small Computer System Interface (SCSI) Documents
X3.131-1994 (SCSI-2) X3.270-199X (SCSI-3) Architecture Model X3.XXX-199 X (SCSI-3) En cl o s u re Services 30553-001 Specification for Acoustic Test Requirement and Procedures
In case of conflict between this document and any referenced document, this document takes precedence.
Cheeta h 9LP FC Product Manual, Rev . C 5
3.0 General description
CheetahTM 9LP FC drives are random access storage devices designed to suppor t the Fibre Channel Arbi­trated Loop (FC-AL) and SCSI Fibre Channel Protocol as described in the ANSI specifications, this document, and the
Fibre Channel Interface Manual
(part numbe r 77767496) w hich d escribes the gen eral interface char­acteristics of this drive. ST39102FC drives are classified as intelligent peripherals and provide level 2 conform­ance (highest level) with the ANSI SCSI-1 standard.
You can view the Fibre Cha nnel interface as a transpor t vehicle for the suppor ted command set (ST 39102FC drives use the SCSI command set). In fact, the Fibre Channel interface is unaware of the content or meaning of the information being transported. It simply packs the SCSI commands in frames, transports them to the appropriate devices, and provides error checking to ensure that the information reaches its destination accu­rately. Refer to the docume nts referenced in Section 2.2 if you requi re additional in formation about the Fibre Channel interface, FC-AL topology, or the SCSI fibre channel protocol.
The head and disc as sembly (HDA) is environmentally sealed at the factory. Air recirculates within the HDA through a non-replaceable filter to maintain a contamination-free HDA environment.
See Figure 2 for an exploded view of the drive. Never disassemble the HDA. This exploded view is for informa­tion only. Do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive contains no parts replaceable by the user and opening the HDA for any reason voids your warranty.
Figure 2. Cheetah 9LP FC disc drive
Cheetah 9LP FC
drives use a dedicated landing zone at the inner m os t radius of the media to eliminate the pos­sibility of destroying or degrading data by landing in the data zone. The heads automatically go to the landing zone when power is removed from the drive.
An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur­ing shipping and handling. The shipping lock disen gages and the head load process begins when power is applied to the drive.
The drives also use a high-performance actuator assembly design that provides excellent performance with minimum power dissipation.
6 Cheetah 9LP FC Product Man ual , Rev. C
3.1 Standard features
Cheetah 9LP FC
drives have the following standard features:
• Integrated dual port FC-AL controller
• Concurrent dual port transfers
• Support for FC arbitrated loop and private and public loop attachment
• Differential copper FC drivers and receivers
• Downloadable firmware using the FC-AL interface
• Drive selection ID and configuration options are set on the FC-AL backpanel or through interface com­mands. Jumpers are not used on the drive.
• Fibre Channel worldwide name uniquely identifies the drive and each por t
• User-selectable logical block size (512 to 4,096 bytes per logical block)
• Selectable frame sizes from 128 to 2,112 bytes
• Industry standard 3.5-inch low profile form factor dimensions
• Programmable logical block reallocation scheme
• Flawed logical block reallocation at format time
• Programmable auto write and read reallocation
• Reed-Solomon error correction code
• Sealed head and disc assembly (HDA)
• No preventive maintenance or adjustments required
• Dedicated head landing zone
• Automatic shipping lock
• Embedded Grey Code track address to eliminate seek errors
• Self-diagnostics performed at power on
• 1:1 interleave
• Zone bit recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• 1,024 Kbyte data buffer. See Section 4.5
• Embedded servo design
• Supports SC SI enclosure services via interface connector
• 128-deep task set (queue)
• Supports up to 32 initiators
• Reallocation of defects on command (Post Format)
• Fibre Channel interface transports SCSI protocol
• Supports SC SI Enclosu re Ser vices through the interface connector
3.2 Media description
The media used on the drive has a diameter of approximately 84 mm (approximately 3.4 inches). The alum i­num substrate is coated with a thin film ma gnetic material, overcoated with a proprietary p rotective layer for improved durability and environmental protection.
3.3 Performance
• Programmable multi-segmentable cache buffer
• 106 Mbytes/sec maximum instantaneous dat a transfers per port.
• 10,025 RPM spindle; average latency = 2.99 msec
• Command queuing of up to 128 commands
• Background processing of queue
• Supports start and stop commands
• Adaptive seek velocity; improved seek performance
3.4 Reliability
• 1,000,000 hour MTBF
• LSI circuitry
Cheeta h 9LP FC Product Manual, Rev . C 7
• Balanced low mass rotary voice coil actuator
• Self-Monitoring Analysis and Reporting Tec hnol ogy (S.M.A.R.T.)
• Dithering
3.5 Unformatted a n d formatted capacities
Standard OEM models are formatted to 512 bytes per block. You can order other capacities by requesting a dif­ferent sparing scheme and logical block size.
The standard OEM model capacities are listed below .
Users having the necessary equipment may modify the data block size before issuing a format command and obtain different formatted capacities than those listed. The ST39102FC uses a zone sparing scheme. The drive is divided into frequency zones with a variable number of spares in each zone.
3.6 Factory-installed accessories
OEM standard drives are shipped with the
Cheetah 9LP FC Installation Guide
(part number 83329340).
3.7 Factory-installed options
You may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping:
• Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units shipped individually require additional protection as provided by the single unit shipping pack. Users planning single unit distribution should specify this option.
3.8 User-installed accessories
The following accessories are available. All kits may be installed in the field.
• Evaluation kit, part number 73473641. This kit provides an adapter card (“T-card”) to allow cable connections for two FC ports and DC power. Two twin axial cables, 6 feet in length, are included for the input and output connections to the FC interface.
Formatted Unformatted
ST39102FC 9.105 Gbytes 11.27 Gbytes
Cheeta h 9LP FC Product Manual, Rev . C 9
4.0 Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Cheetah 9LP FC drives.
4.1 Internal drive characteristics
ST39102FC
Drive capacity 11.27 ........................ Gbytes (unformatted)
9.105 ........................ Gbytes (formatted with 512-byte logical blocks)
Read/write data heads 12
Bytes per track 104,840 - 159,008....Bytes (average, unformatted)
Bytes per surface 939 ........................... Mbytes (unformatted)
Cylinders/ tracks per su rface 6,962 ............ ............Tracks (user accessible)
Tracks per inch 8,962 ........................ TPI
Internal data rate 152-231....................Mbits/sec (v ariable with z one)
Disc rotation speed 10,025 ......................rpm (+
0.5% )
Avg ro tat ional latency 2.99 .............. ........... .msec
4.2 Seek performance characteristics
See Section 9.5, “FC-A L p hysical interface” on page 46 and the
Fibre Channel Interface Manual
(part num ber
77767496) for additional timing details.
4.2.1 Access time
4.2.2 Format command execution time for ≥ 512-byte sectors
Including cont roller overhead
1, 2
(msec)
1. Execution time meas ured from receipt of the FCP Command to the FCP Response .
2. Assumes no errors and no sector has been relocated.
Read Write
Av erage Typical
3,4
3. Typical acc ess times are m easured under nominal condit ions of tem perat ure, v oltage , and h ori zontal
orientation as m easured on a representati ve sample of drives.
4. Access time = contro ller overhead + average seek time.
Access to data = contr oller overhead + average seek time + latency time.
5.4 6.2
Single track Typical
3,4
0.8 1.1
Full stroke Typical
3,4
<12.2 <13.2
ST39102FC
Maximum (with verify) 30 minutes Maximum (without verify) 15 minutes
10 Cheetah 9LP FC Product Manual, Rev. C
4.2.3 General performance characteristics
4.3 S tar t/st op time
If the Motor Start option is disabled, the drive becomes ready within 30 seconds after DC power is applied. If a recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and the time to become ready may exceed 30 seconds. During the star t sequence, the drive responds to some commands over the FC-AL interface. Stop time is less than 30 seconds (maximum) from removal of DC power.
If the Motor Start option is enabled, the internal controller accepts the commands listed in the
Fibre Channel
Interface Manual
less than 3 seconds aft er DC power has been applied. A fter the Motor Star t command has been received, the drive becomes ready for normal operations within 30 seconds (excluding the error recovery procedure). The Motor Start command can also be used to comman d the drive to stop the spindle.
There is no power control switch on the drive.
4.4 Prefetch/multi-segmented cache control
The drive provides a prefetch/multi-segmented cache algorithm that in many cases can en hance system per­formance. To sel ec t this feature the host s ends the Mode Selec t comm and with t he proper values in the appli­cable bytes in page 08h. Default is prefetch and read cache enabled.
If the Prefetch feature is enabled, data in contiguous logical blocks on the disc i mmediately beyond that which was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer to the host on subs eque nt Read commands tha t reques t t hos e lo gical blocks (this is t rue even if cache opera­tion is disabled). To enable Prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch.
Since data that is prefetched replaces data already in some buffer segments, the host can limit the amount of prefetch data to optimize system performance. The Max Prefetch field (bytes 8 and 9) limits the amount of prefetch. The drive does not use the Prefetch Ceiling field (bytes 10 and 11).
4.5 Cache operation Note. Refer to the
Fibre Channel Interface Manual
for more detail concerning the cache bits.
ST39102FC
Minimum sector interleave 1 to 1
Data buffer to/from disc media (one 512-byte logical block)*
Minimum 19.0 MBytes/sec Average 23.9 MBytes/sec Maximum 28.4 MBytes/sec
Fibre Channel Interface maximum instantaneous transfer rate 106 Mbytes/sec*per
port (dual port = 212 Mbytes/sec*)
Logical block size s
Default i s 512-byte data blocks Variable 512 to 4,096 bytes per sector in multiples of 4 bytes.
Read/write consecu ti ve sectors on a track
Yes
Overhead time for head switch in sequential mode
0.8 msec
Overhead time for one track cylinder switch in sequential mode
1.2 msec (typical)
Av erage rotational latency
2.99 msec
*Assumes no error s and no reloca ted log ical b loc ks . Rate measur ed from t he st art of the fi rst l ogical block transfer to or from the host.
Cheeta h 9LP FC Product Manual, Rev . C 11
Of the 1,024 Kbytes physical buffer space in the drive, 967.5 Kbytes can be u sed as a cache. The cache can be divided into logical segments from which data is read and to which data is written.
The drive keeps track of the logical block addresses of the data stored in each segment of the cache. If the cache is enabled (see RCD bit in the
Fibre Channel Interface Manual
), data requested by the host with a read command is retriev ed from the cache, if possible, before any disc access is initiated. Data in contiguous logical blocks immediately beyond that requested by the Read command c an be retrieved and stored in the cache for immediate transfer to the initiator on subsequent read commands. This is referred to as the prefetch operation. Since data that is prefetched may replace data already in the cach e segm ent , an i nitiator c an l imit the am ount of prefetch data to optimize system performance. The drive never prefetches more sectors than the number specified in bytes 8 and 9 of M ode page 08h. If t he cache is not enabl ed, 967.5 Kbytes of the buffer are used as a circular buffer for read/writes, with no prefetch operation and no segmented cache operation.
The following is a simplified description of the prefetch/cache operation: Case A—read command is received and the first logical block is already in cache:
1. Drive transfers to the initiator the first logical block requested plus all subsequent contiguous logical blocks
that are already in the cache. This data may be in multiple segments.
2. When a requested logical block is reached tha t is not in a ny segment , the drive fetches it and any remain-
ing requested logical block addresses from the disc and puts them in a segm ent of the cache. The dr ive transfers the remaining requested logical blocks from the cache to the initiator in accordance with the “buffer-full” ratio specification given in Mode Select Disconnect/Reconnect parameters, page 02h.
3. The drive prefetches additional logical blocks contiguous to those transferred in step 2 above and stores
them in the segme nt. The drive stops filling the segment when the maximum p refetch value has been transferred.
Case B—read comman d is recei ved and the fi rst logical block addres s re queste d is n ot in any segm ent of the cache.
1. The drive fetches the requested logical blocks from the disc a nd transfers them into a segment, and th en
from there to the initiator in accordance with t he “buffer-full” ratio specification given in Mode Select Dis­connect/Reconnect parameters, page 02h.
2. The drive prefetches additional logical blocks contiguous to those transferred in Case A, step 2 above and
stores th em in the segm ent. The drive s tops filling the segment wh en the maximum prefetch value has been transferred.
During a prefetch, the drive crosses a cylind er bound ary to fetch data only if the Dis continuity (DISC) bit is s et to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h. Default is zero for bit 4.
Each cache segment is actually a self-contained circul ar buffer whose length is an integer number of logical blocks. The wrap-around capability of the individual segments greatly enhances the cache’s overall perfor­mance, allowing a wide range of user-selectable configurations. The drive suppor ts operation of any integer number of segments f rom 1 to 16. Divide th e 9 67.5 K bytes in the buffer by the number of segments t o get the segment size. Default is 3 segments.
Note. The size of each segment is not reported by Mode Sense c ommand page 08h, bytes 14 and 15. The
value 0XFFFF is always reported regardl es s of the ac tual size of the segment. Sending a size s pecifi­cation using the Mode Select command (bytes 14 and 15) does not set up a new segment size. If the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt to change an unchangeable parameter.
4.5.1 Caching write data
Write caching is a write operation by the drive that makes use of a drive buffer storage area where the dat a t o be written to the medium is stored while the drive performs the Write command.
Write caching is enabled independently of read caching. Write caching is enabled by default. To disable the write cache, use the Write Caching Enable (WCE) bit.
For write caching, the same buffer space and segmentation is used as set up for read functions. Wh en a write command is issued , the cache is first checked to see if a ny logical blocks that are to be written are al ready
12 Cheetah 9LP FC Product Manual, Rev. C
stored in the cache from a previous read or wr ite command. If there are, the respective cache segm ents are cleared. The new data is cached for subsequent read commands.
If a 10-byte CDB Write command (2Ah) is issued with the data page out (DPO) bit set to 1, no write data is cached, but the cache segm ents are s till checked and cleared, if need be, for any logical blocks that are bei ng written.
If the number of write data logical blocks exceeds the size of the segment being written into when the end of the segment is reached, the data is written into the beginning of the same cache segment, overwriting the data that was written there at the beginning of the operation. Howev er, the drive does not overwrite data that has not yet been written to the medium.
Cheeta h 9LP FC Product Manual, Rev . C 13
5.0 Reliability specifications
The following reliability specifications assume correct host and drive operational interface, including all inter­face timings, power supply voltages, and environmental requirements.
5.1 Error rates
The erro r rates stated in th is manual assume the following:
• The drive is operated in accordance with this manual using DC power as defined in paragraph 6.2, “DC
power requirements.”
• The drive has been formatted with the FC-AL Format command.
• Errors caused by media defects or host system failures are excluded from error rate computations.
5.1.1 Environmental interference
When evaluating systems operation under c onditions of electromagn etic interference (EMI), the performance of the drive within the system is c onsid ered acceptable if the drive doe s not gene rate a n unrecoverable condi­tion.
An unrecoverable error, or condition, is defined as one that:
• is not detected and corrected by the drive itself
• is not detected from the error or fault status provided through the drive or FC-AL interface
• is not recovered by normal drive or system recovery procedures without operator intervention
5.1.2 Interface errors
An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the device port connected to the receiver. The error may be detected as a running disparity error, illegal code, loss of word sync, or CRC error. Th e total error rate for a loop of devices is the sum of the individual device error rates.
5.1.3 Write errors
Write errors can occur a s a result of media defects, environmental interference, or equipment malfunc tion. Therefore, write errors are not predictable as a function of the number of bits passed.
If an unrecoverable write error occurs because of an equipment malfunction in the drive, the error is classified as a failure affecting MTBF. Unrecoverable write errors are those that cannot be corrected w ithin two at tempts at writing the record with a read verify after each attempt (excluding media defects).
5.1.4 Seek errors
A seek error is defined as a fail ure of the drive to position the heads to the addressed track. If the error recov­ery fails, a seek positioning error (15h) is reported with a Medium (03h) or Hardware Error (04h) reported in the sense key. This is an unrecoverable seek error. Unrecove rable seek errors are classified as failures for MTBF calculations.
Seek error rate:
Less than 10 errors in 10
8
seeks
Recoverable media error rate (using OEM default settings):
Less than 10 errors in 10
12
bits transferred
Unrecovered media data:
Less than 1 sector in 10
15
bits transferred
Miscorrected media data:
Less than 1 sector in 10
21
bits transferred
Interface error rate:
Less than 1 error in 10
12
bits transferred with minimum receive eye.
Less than 1 error in 10
14
bits transferred with typical receive eye.
See Section 9.6.4, “Differential PECL input.” on page 54 MTBF: 1,000,000 hours Service life: 5 years Preventive maintenance: None required
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