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Seagate 15K.3 ST373453FC Model Product Manual PDF - Page 69

Cheetah 15K.3 FC Product Manual, Rev. D, Enable port bypass signals, Motor start controls, SEL_6

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Cheetah 15K.3 FC Product Manual, Rev. D 59 The Active LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +5 volt supply through an appropriate current limiting resistor. The LED and the current limiting resistor are external to the drive. 9.5.9 Enable port bypass signals The - Enable Bypass Port A (- EN BYP Port A) and - Enable Bypass Port B (- EN BYP Port B) signals control the port bypass circuits (PBC) located external to the disc drive. The PBC allows a loop to remain functional in the event of a drive failure or removal. When these signals are active, low, the PBC bypasses the drive on the associated port. When an Enable Bypass signal is active, the corresponding Port Bypass LED signal in connector J1 is driven low by the disc drive. A pull down resistor, 1K, located with the PBC should be used to insure the bypass is enabled if the disc drive is not installed. The Enable Bypass signal is active under failing conditions within the drive, on detection of the Loop Port Bypass primitive sequence, or on removal of the drive. In the bypass state the drive continues to receive on the inbound fibre. Enable Bypass may be deactivated by detection of a Loop Port Enable primitive sequence if the drive has completed self-test and a hardware failure is not present. Failure modes detected by the disc drive that will enable bypass include: • Transmitter/receiver wrap test failure • Loss of receive clock • Loss of transmission clock • Drive interface hardware error 9.5.10 Motor start controls The drive's motor is started according to the Start_1 and Start_2 signals described in Table 23. The state of these signals can be wired into the backplane socket or driven by logic on the backplane. Table 23: Motor start control signals Case 1 2 3 Start_2 Low High Low 4 High Start_1 Low Low High High Motor spin function Motor spins up at DC power on. Motor spins up only when SCSI Start command is received. Motor spins up after a delay of 12 seconds times the modulo 8 value of the numeric SEL ID of the drive from DC power on. The drive will not spin up. 9.5.11 SEL_6 through SEL_0 ID lines The SEL_6 through SEL_0 ID lines determine drive address, and, optionally, for an Enclosure Services Interface. When the Parallel ESI line is high, the enclosure backpanel must provide address information on the SEL line. Refer to table 24 for a mapping of SEL to FC-AL physical addresses (AL_PA). You can think of the SEL lines as the equivalent of a backpanel logic plug. The drives does not provide pull up resistors on these lines. The backpanel is required to provide high and low inputs to the SEL_ID lines per the specifications in table 26 on page 62. Note. Table 24 gives AL_PA values for each SEL value. The first entry in the table is SEL_ID 00. The last entry is SEL_ID 7D. SEL_ID 7E is AL_PA 00 which is not valid for an NL_Port, so is not included in the table. Also, SEL_ID 7Fh does map to a valid AL_PA; however, this value signals the drive that physical addresses are not being assigned using the SEL lines and that a "soft" address will be determined by FC-AL loop initialization. When the Parallel ESI line is low, the enclosure backpanel logic switches to ESI mode if supported. There are two modes of ESI, seven bits of enclosure status and a bidirectional mode. ESI support and the mode are determined by the drive using a discovery process. Refer to the Fibre Channel Interface Manual for a description of ESI operation.

Section	Page
1.0 Scope 1	7
2.0 Applicable standards and reference documentation 3	7
2.1 Standards 3	7
2.1.1 Electromagnetic compatibility 3	7
2.1.2 Electromagnetic compliance 3	7
2.2 Reference documents 4	7
3.0 General description 5	7
3.1 Standard features 6	7
3.2 Media description 6	7
3.3 Performance 6	7
3.4 Reliability 7	7
3.5 Unformatted and formatted capacities 7	7
3.6 Programmable drive capacity 7	7
3.7 Factory-installed accessories 7	7
3.8 Factory-installed options 7	7
3.9 User-installed accessories 7	7
4.0 Performance characteristics 9	7
4.1 Internal drive characteristics 9	7
4.2 Seek performance characteristics 9	7
4.2.1 Access time 9	7
4.2.2 Format command execution time for ³ 512-byte sectors (minutes) 9	7
4.2.3 General performance characteristics 10	7
4.3 Start/stop time 10	7
4.4 Prefetch/multi-segmented cache control 10	7
4.5 Cache operation 10	7
4.5.1 Caching write data 11	7
4.5.2 Prefetch operation 12	7
4.5.3 Optimizing cache performance for desktop and server applications 12	7
5.0 Reliability specifications 13	7
5.1 Error rates 13	7
5.1.1 Interface errors 13	7
5.1.2 Environmental interference 13	7
5.1.3 Write errors 13	7
5.1.4 Seek errors 13	7
5.2 Reliability and service 14	7
5.2.1 Mean time between failure (MTBF) 14	7
5.2.2 Preventive maintenance 14	7
5.2.3 Service life 14	7
5.2.4 Service philosophy 14	7
5.2.5 Service tools 14	7
5.2.6 Hot plugging the drive 14	7
5.2.7 S.M.A.R.T. 15	7
5.2.8 Thermal monitor 16	7
5.2.9 Drive Self Test (DST) 17	7
5.2.10 Product warranty 19	7
6.0 Physical/electrical specifications 21	7
6.1 AC power requirements 21	7
6.2 DC power requirements 21	7
6.2.1 Conducted noise immunity 22	7
6.2.2 Power sequencing 22	7
6.2.3 Current profiles 22	7
6.3 Power dissipation 26	7
6.4 Environmental limits 27	7
6.4.1 Temperature 27	8
6.4.2 Relative humidity 28	8
6.4.3 Effective altitude (sea level) 28	8
6.4.4 Shock and vibration 28	8
6.4.5 Air cleanliness 31	8
6.4.6 Acoustics 31	8
6.4.7 Electromagnetic susceptibility 31	8
6.5 Mechanical specifications 32	8
7.0 Defect and error management 33	8
7.1 Drive internal defects/errors 33	8
7.2 Drive error recovery procedures 33	8
7.3 FC-AL system errors 34	8
8.0 Installation 35	8
8.1 Drive ID/option selection 35	8
8.2 LED connections 35	8
8.2.1 J6 connector requirements 36	8
8.3 Drive orientation 36	8
8.4 Cooling 36	8
8.5 Drive mounting 37	8
8.6 Grounding 37	8
9.0 Interface requirements 39	8
9.1 FC-AL features 39	8
9.1.1 Fibre Channel link service frames 39	8
9.1.2 Fibre Channel task management functions 39	8
9.1.3 Fibre Channel task management responses 39	8
9.1.4 Fibre Channel port login 40	8
9.1.5 Fibre Channel port login accept 41	8
9.1.6 Fibre Channel Process Login 41	8
9.1.7 Fibre Channel Process Login Accept 41	8
9.1.8 Fibre Channel fabric login 42	8
9.1.9 Fibre Channel fabric accept login 43	8
9.1.10 Fibre Channel Arbitrated Loop options 44	8
9.2 Dual port support 44	8
9.3 SCSI commands supported 45	8
9.3.1 Inquiry data 49	8
9.3.2 Mode Sense data 49	8
9.4 Miscellaneous operating features and conditions 54	8
9.5 FC-AL physical interface 55	8
9.5.1 Physical characteristics 55	8
9.5.2 Connector requirements 56	8
9.5.3 Electrical description 57	8
9.5.4 Pin descriptions 57	8
9.5.5 FC-AL transmitters and receivers 58	8
9.5.6 Power 58	8
9.5.7 Fault LED Out 58	8
9.5.8 Active LED Out 58	8
9.5.9 Enable port bypass signals 59	8
9.5.10 Motor start controls 59	8
9.5.11 SEL_6 through SEL_0 ID lines 59	8
9.5.12 Device control codes 62	8
9.6 Signal characteristics 62	8
9.6.1 TTL input characteristics 62	8
9.6.2 LED driver signals 62	8
9.6.3 Differential PECL output 63	8
9.6.4 Differential PECL input 63	8
10.0 Seagate Technology support services 65	8
Figure 1. Cheetah 15K.3 FC family disc drive 1	9
Figure 2. Typical ST373453FC drive +12V current profile 22	9
Figure 3. Typical ST373453FC drive +5V current profile 23	9
Figure 4. Typical ST336753FC drive +12V current profile 23	9
Figure 5. Typical ST336753FC drive +5V current profile 24	9
Figure 6. Typical ST318453FC drive +12V current profile 24	9
Figure 7. Typical ST318453FC drive +5V current profile 25	9
Figure 8. ST373453FC DC current and power vs. input/output operations per second 26	9
Figure 9. ST336753FC DC current and power vs. input/output operations per second 26	9
Figure 10. ST318453FC DC current and power vs. input/output operations per second 27	9
Figure 11. Locations of the HDA temperature check point 28	9
Figure 12. Recommended mounting 30	9
Figure 13. Mounting configuration dimensions 32	9
Figure 14. Physical interface 35	9
Figure 15. LED indicator connector 36	9
Figure 16. Air flow 37	9
Figure 17. Physical interface 55	9
Figure 18. Port bypass circuit physical interconnect 55	9
Figure 19. FC-AL SCA device connector dimensions 56	9
Figure 20. J6 connector dimensions 56	9
Figure 21. FC-AL transmitters and receivers 58	9
Figure 22. Transmit eye diagram 63	9
Figure 23. Receive eye diagram 63	9
1.0 Scope	11
2.0 Applicable standards and reference documentation	13
2.1 Standards	13
2.1.1 Electromagnetic compatibility	13
2.1.1.1 Electromagnetic susceptibility	13
2.1.2 Electromagnetic compliance	13
2.2 Reference documents	14
3.0 General description	15
3.1 Standard features	16
3.2 Media description	16
3.3 Performance	16
3.4 Reliability	17
3.5 Unformatted and formatted capacities	17
3.6 Programmable drive capacity	17
3.7 Factory-installed accessories	17
3.8 Factory-installed options	17
3.9 User-installed accessories	17
4.0 Performance characteristics	19
4.1 Internal drive characteristics	19
4.2 Seek performance characteristics	19
4.2.1 Access time	19
4.2.2 Format command execution time for ³ 512-byte sectors (minutes)	19
4.2.3 General performance characteristics	20
4.3 Start/stop time	20
4.4 Prefetch/multi-segmented cache control	20
4.5 Cache operation	20
4.5.1 Caching write data	21
4.5.2 Prefetch operation	22
4.5.3 Optimizing cache performance for desktop and server applications	22
5.0 Reliability specifications	23
5.1 Error rates	23
5.1.1 Interface errors	23
5.1.2 Environmental interference	23
5.1.3 Write errors	23
5.1.4 Seek errors	23
5.2 Reliability and service	24
5.2.1 Mean time between failure (MTBF)	24
5.2.2 Preventive maintenance	24
5.2.3 Service life	24
5.2.4 Service philosophy	24
5.2.5 Service tools	24
5.2.6 Hot plugging the drive	24
5.2.7 S.M.A.R.T.	25
5.2.8 Thermal monitor	26
5.2.9 Drive Self Test (DST)	27
5.2.9.1 DST failure definition	27
5.2.9.2 Implementation	27
5.2.9.2.1 State of the drive prior to testing	27
5.2.9.2.2 Invoking DST	28
5.2.9.2.3 Short and extended tests	28
5.2.9.2.4 Log page entries	28
5.2.9.2.5 Abort	28
5.2.10 Product warranty	29
6.0 Physical/electrical specifications	31
6.1 AC power requirements	31
6.2 DC power requirements	31
6.2.1 Conducted noise immunity	32
6.2.2 Power sequencing	32
6.2.3 Current profiles	32
6.3 Power dissipation	36
6.4 Environmental limits	37
6.4.1 Temperature	37
6.4.2 Relative humidity	38
6.4.3 Effective altitude (sea level)	38
6.4.4 Shock and vibration	38
6.4.4.1 Shock	38
6.4.4.2 Vibration	41
6.4.5 Air cleanliness	41
6.4.6 Acoustics	41
6.4.7 Electromagnetic susceptibility	41
6.5 Mechanical specifications	42
7.0 Defect and error management	43
7.1 Drive internal defects/errors	43
7.2 Drive error recovery procedures	43
7.3 FC-AL system errors	44
8.0 Installation	45
8.1 Drive ID/option selection	45
8.2 LED connections	45
8.2.1 J6 connector requirements	46
8.3 Drive orientation	46
8.4 Cooling	46
8.5 Drive mounting	47
8.6 Grounding	47
9.0 Interface requirements	49
9.1 FC-AL features	49
9.1.1 Fibre Channel link service frames	49
9.1.2 Fibre Channel task management functions	49
9.1.3 Fibre Channel task management responses	49
9.1.4 Fibre Channel port login	50
9.1.5 Fibre Channel port login accept	51
9.1.6 Fibre Channel Process Login	51
9.1.7 Fibre Channel Process Login Accept	51
9.1.8 Fibre Channel fabric login	52
9.1.9 Fibre Channel fabric accept login	53
9.1.10 Fibre Channel Arbitrated Loop options	54
9.2 Dual port support	54
9.3 SCSI commands supported	55
9.3.1 Inquiry data	59
9.3.2 Mode Sense data	59
9.4 Miscellaneous operating features and conditions	64
9.5 FC-AL physical interface	65
9.5.1 Physical characteristics	65
9.5.1.1 Physical description	65
9.5.2 Connector requirements	66
9.5.3 Electrical description	67
9.5.4 Pin descriptions	67
9.5.5 FC-AL transmitters and receivers	68
9.5.6 Power	68
9.5.7 Fault LED Out	68
9.5.8 Active LED Out	68
9.5.9 Enable port bypass signals	69
9.5.10 Motor start controls	69
9.5.11 SEL_6 through SEL_0 ID lines	69
9.5.11.1 Parallel Enclosure Services Interface (ESI)	70
9.5.12 Device control codes	72
9.6 Signal characteristics	72
9.6.1 TTL input characteristics	72
9.6.2 LED driver signals	72
9.6.3 Differential PECL output	73
9.6.4 Differential PECL input	73
10.0 Seagate Technology support services	75
Numerics	79
A	79
B	79
C	79
D	79
E	80
F	80
G	81
H	81
I	81
J	81
L	81
M	81
N	82
O	82
P	82
Q	83
R	83
S	83
T	84
U	84
V	84
W	84
X	84

Match case Limit results 1 per page

Cheetah 15K.3 FC Product Manual, Rev. D

The Active LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper

+5 volt supply through an appropriate current limiting resistor. The LED and the current limiting resistor are

external to the drive.

9.5.9

Enable port bypass signals

The – Enable Bypass Port A (– EN BYP Port A) and – Enable Bypass Port B (– EN BYP Port B) signals control

the port bypass circuits (PBC) located external to the disc drive. The PBC allows a loop to remain functional in

the event of a drive failure or removal. When these signals are active, low, the PBC bypasses the drive on the

associated port. When an Enable Bypass signal is active, the corresponding Port Bypass LED signal in con-

nector J1 is driven low by the disc drive. A pull down resistor, 1K, located with the PBC should be used to

insure the bypass is enabled if the disc drive is not installed.

The Enable Bypass signal is active under failing conditions within the drive, on detection of the Loop Port

Bypass primitive sequence, or on removal of the drive. In the bypass state the drive continues to receive on the

inbound fibre. Enable Bypass may be deactivated by detection of a Loop Port Enable primitive sequence if the

drive has completed self-test and a hardware failure is not present.

Failure modes detected by the disc drive that will enable bypass include:

•

Transmitter/receiver wrap test failure

•

Loss of receive clock

•

Loss of transmission clock

•

Drive interface hardware error

9.5.10

Motor start controls

The drive’s motor is started according to the Start_1 and Start_2 signals described in Table 23. The state of

these signals can be wired into the backplane socket or driven by logic on the backplane.

9.5.11

SEL_6 through SEL_0 ID lines

The SEL_6 through SEL_0 ID lines determine drive address, and, optionally, for an Enclosure Services Inter-

face. When the Parallel ESI line is high, the enclosure backpanel must provide address information on the SEL

line. Refer to table 24 for a mapping of SEL to FC-AL physical addresses (AL_PA). You can think of the SEL

lines as the equivalent of a backpanel logic plug. The drives does not provide pull up resistors on these lines.

The backpanel is required to provide high and low inputs to the SEL_ID lines per the specifications in table 26

on page 62.

Note.

Table 24 gives AL_PA values for each SEL value. The first entry in the table is SEL_ID 00. The last

entry is SEL_ID 7D. SEL_ID 7E is AL_PA 00 which is not valid for an NL_Port, so is not included in the

table. Also, SEL_ID 7Fh does map to a valid AL_PA; however, this value signals the drive that physical

addresses are not being assigned using the SEL lines and that a “soft” address will be determined by

FC-AL loop initialization.

When the Parallel ESI line is low, the enclosure backpanel logic switches to ESI mode if supported. There are

two modes of ESI, seven bits of enclosure status and a bidirectional mode. ESI support and the mode are

determined by the drive using a discovery process. Refer to the

Fibre Channel Interface Manual

for a descrip-

tion of ESI operation.

Table 23:

Motor start control signals

Case

Start_2

Start_1

Motor spin function

Low

Motor spins up at DC power on.

High

Low

Motor spins up only when SCSI Start command is received.

Low

High

Motor spins up after a delay of 12 seconds times the modulo 8 value of

the numeric SEL ID of the drive from DC power on.

High

The drive will not spin up.