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Seagate ST300MP0004 Savvio 15K SAS Product Manual - Page 69

Jitter tolerance masks

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9.5.2.1.3 Jitter tolerance masks Figure 17 describes the receive tolerance eye masks and is constructed using the X2 and Z2 values given in table 19. X1OP is half the value for total jitter intable 19 and X1TOL is half the value for total jitter in table 20, for jitter frequencies above ((bit rate) / 1.667). Absolute amplitude (in V) (additional sinusoidal jitter) / 2 Z2 Z1OP Z1TOL 0 V -Z1TOL -Z1OP -Z2 0 X1OP X2 1 1-X1OP X1TOL 1-X1TOL Normalized time (in UI) Outline of eye mask before adding sinusoidal jitter Outline of eye mask after adding sinusoidal jitter Figure 17. Reveive tolerance eye mask The leading and trailing edge slopes of figure 16 shall be preserved. As a result the amplitude value of Z1 is less than that given in table 18 and Z1TOL and Z1OP shall be defined from those slopes by the following equation: where: Z1TOL = Z1OPx -X----2---O-----P 0----,---5----)--x---a----d---d---i--t-i--o---n---a----l---s---i-n---u----s---o---i-d----a---l---j-i--t-t--e---r X----1----O-----P-X2OP - X1OP Z1TOL is the value for Z1 to be used for the tolerance masks; and Z1OP, X1OP, and X2OP are the values in table 18 for Z1, X1, and X2. The X1 points in the receive tolerance masks are greater than the X1 points in the receive masks, due to the addition of sinusoidal jitter. Savvio 15K SAS Product Manual, Rev. B 61

Section	Page
Figure 1. Typical ST973451SS current profile 25	7
Figure 2. Typical ST936751SS current profile 26	7
Figure 3. ST973451SS (3 Gbit) DC current and power vs. input/output operations per second 27	7
Figure 4. ST973451SS (1.5 Gbit) DC current and power vs. input/output operations per second 27	7
Figure 5. ST936751SS (3 Gbit) DC current and power vs. input/output operations per second 28	7
Figure 6. ST936751SS (1.5 Gbit) DC current and power vs. input/output operations per second 28	7
Figure 7. Location of the HDA temperature check point 29	7
Figure 8. Recommended mounting 31	7
Figure 9. Mounting configuration dimensions 34	7
Figure 10. Physical interface 39	7
Figure 11. Air flow 40	7
Figure 12. Physical interface 54	7
Figure 13. SAS device plug dimensions 55	7
Figure 14. SAS device plug dimensions (detail) 56	7
Figure 15. SAS transmitters and receivers 58	7
Figure 16. Receive eye mask 60	7
Figure 17. Reveive tolerance eye mask 61	7
Figure 18. Sinusoidal jitter mask 62	7
Figure 19. Compliance interconnect test load 67	7
Figure 20. Zero-length test load 68	7
Figure 21. ISI loss example at 3.0 Gbps 68	7
Figure 22. ISI loss example at 1.5 Gbps 68	7
1.0 Scope	9
2.0 Applicable standards and reference documentation	11
2.1 Standards	11
2.1.1 Electromagnetic compatibility	11
2.1.1.1 Electromagnetic susceptibility	11
2.1.2 Electromagnetic compliance	12
2.1.3 European Union Restriction of Hazardous Substances (RoHS)	13
2.2 Reference documents	13
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 Formatted capacities	17
3.6 Programmable drive capacity	17
3.7 Factory-installed accessories	17
3.8 Options	18
4.0 Performance characteristics	19
4.1 Internal drive characteristics	19
4.2 Seek performance characteristics	19
4.2.1 Access time (Gen 2.0 LP data)	19
4.2.2 Format command execution time	20
4.2.3 General performance characteristics	20
4.3 Start/stop time	21
4.4 Prefetch/multi-segmented cache control	21
4.5 Cache operation	21
4.5.1 Caching write data	22
4.5.2 Prefetch operation	22
5.0 Reliability specifications	23
5.1 Error rates	23
5.1.1 Recoverable Errors	23
5.1.2 Unrecoverable Errors	23
5.1.3 Seek errors	24
5.1.4 Interface errors	24
5.2 Reliability and service	24
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	24
5.2.2 Preventive maintenance	24
5.2.3 Hot plugging the drive	24
5.2.4 S.M.A.R.T.	25
5.2.5 Thermal monitor	26
5.2.6 Drive Self Test (DST)	26
5.2.6.1 DST failure definition	27
5.2.6.2 Implementation	27
5.2.6.2.1 State of the drive prior to testing	27
5.2.6.2.2 Invoking DST	27
5.2.6.2.3 Short and extended tests	27
5.2.6.2.4 Log page entries	28
5.2.6.2.5 Abort	28
5.2.7 Product warranty	28
6.0 Physical/electrical specifications	31
6.1 AC power requirements	31
6.2 DC power requirements	31
6.2.1 Conducted noise immunity	33
6.2.2 Power sequencing	33
6.2.3 Current profiles	33
6.3 Power dissipation	35
6.4 Environmental limits	37
6.4.1 Temperature	37
6.4.2 Relative humidity	37
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	40
6.4.5 Air cleanliness	40
6.4.6 Corrosive environment	40
6.4.7 Acoustics	41
6.4.8 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 SAS system errors	44
7.4 Background Media Scan	45
7.5 Media Pre-Scan	45
7.6 Deferred Auto-Reallocation	45
7.7 Idle Read After Write	46
8.0 Installation	47
8.1 Drive orientation	47
8.2 Cooling	48
8.3 Drive mounting	49
8.4 Grounding	49
9.0 Interface requirements	51
9.1 SAS features	51
9.1.1 task management functions	51
9.1.2 Task management responses	51
9.2 Dual port support	52
9.3 SCSI commands supported	53
9.3.1 Inquiry data	57
9.3.2 Mode Sense data	57
9.4 Miscellaneous operating features and conditions	61
9.4.1 SAS physical interface	62
9.4.2 Physical characteristics	65
9.4.3 Connector requirements	65
9.4.4 Electrical description	65
9.4.5 Pin descriptions	65
9.4.6 SAS transmitters and receivers	66
9.4.7 Power	67
9.5 Signal characteristics	67
9.5.1 Ready LED Out	67
9.5.2 Differential signals	67
9.5.2.1 Eye masks	68
9.5.2.1.1 Eye masks overview	68
9.5.2.1.2 Receive eye mask	68
9.5.2.1.3 Jitter tolerance masks	69
9.5.2.2 Transmitter signal characteristics	70
9.5.2.3 Receiver signal characteristics	71
9.5.2.3.1 Jitter	72
9.5.2.3.2 Receiver jitter tolerance	72
9.5.2.3.3 Compliant jitter test pattern (CJTPAT)	72
9.5.2.3.4 Impedance specifications	73
9.5.2.4 Electrical TxRx connections	74
9.5.2.4.1 Transmitter characteristics	74
9.5.2.5 Receiver characteristics	77
10.0 Seagate Technology support services	79
Numerics	81
A	81
B	81
C	81
D	81
E	81
F	82
G	82
H	82
I	82
J	82
L	82
M	82
N	83
O	83
P	83
Q	83
R	83
S	83
T	84
U	84
V	84
W	84