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Seagate ST3300457FC Cheetah 15K.7 SAS Product Manual - Page 68

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12.4.6 SAS transmitters and receivers A typical SAS differential copper transmitter and receiver pair is shown in Figure 15. The receiver is AC coupling to eliminate ground shift noise. TX Transmitter 100 TY Differential Transfer Medium .01 RX Receiver 100 .01 RY Figure 15. SAS transmitters and receivers 12.4.7 Power The drive receives power (+5 volts and +12 volts) through the SAS device connector. Three +12 volt pins provide power to the drive, 2 short and 1 long. The current return for the +12 volt power supply is through the common ground pins. The supply current and return current must be distributed as evenly as possible among the pins. Three +5 volt pins provide power to the drive, 2 short and 1 long. The current return for the +5 volt power supply is through the common ground pins. The supply current and return current must be distributed as evenly as possible among the pins. Current to the drive through the long power pins may be limited by the system to reduce inrush current to the drive during hot plugging. 12.5 Signal characteristics This section describes the electrical signal characteristics of the drive's input and output signals. See Table 23 for signal type and signal name information. 12.5.1 Ready LED Out The Ready LED Out signal is driven by the drive as indicated in Table 24. Table 24: Ready LED Out conditions Normal command activity Ready LED Meaning bit mode page 19h Spun down and no activity Spun down and activity (command executing) Spun up and no activity Spun up and activity (command executing) Spinning up or down Format in progress Write Same command in progress LED status 0 1 Off Off On On On Off Off On Blinks steadily (50% on and 50% off, 0.5 seconds on and off for 0.5 seconds) Toggles on/off Toggles on/off 62 Cheetah 15K.7 SAS Product Manual, Rev. C

Section	Page
1.0 Seagate Technology support services	7
2.0 Scope	8
3.0 Standards, compliance and reference documents	9
3.1 Standards	9
3.1.1 Electromagnetic compatibility	9
3.1.1.1 Electromagnetic susceptibility	9
3.2 Compliance	10
3.2.1 Electromagnetic compliance	10
3.3 European Union Restriction of Hazardous Substances (RoHS)	10
3.4 Reference documents	11
4.0 General description	12
4.1 Standard features	13
4.2 Media description	13
4.3 Performance	13
4.4 Reliability	14
4.5 Formatted capacities	14
4.6 Programmable drive capacity	14
4.7 Factory-installed options	14
5.0 Performance characteristics	15
5.1 Internal drive characteristics	15
5.2 Seek time	15
5.2.1 Access time	15
5.2.2 Format command execution time (minutes)	16
5.2.3 General performance characteristics	16
5.3 Start/stop time	16
5.4 Prefetch/multi-segmented cache control	17
5.5 Cache operation	17
5.5.1 Caching write data	18
5.5.2 Prefetch operation	18
6.0 Reliability specifications	19
6.1 Error rates	19
6.1.1 Recoverable Errors	19
6.1.2 Unrecoverable Errors	19
6.1.3 Seek errors	20
6.1.4 Interface errors	20
6.2 Reliability and service	20
6.2.1 Annualized Failrue Rate (AFR) and Mean time between failure (MTBF)	20
6.2.2 Preventive maintenance	20
6.2.3 Hot plugging the drive	20
6.2.4 S.M.A.R.T.	21
6.2.5 Thermal monitor	22
6.2.6 Drive Self Test (DST)	23
6.2.6.1 DST failure definition	23
6.2.6.2 Implementation	23
6.2.7 Product warranty	25
7.0 Physical/electrical specifications	26
7.1 AC power requirements	26
7.2 DC power requirements	26
7.2.1 Conducted noise immunity	30
7.2.2 Power sequencing	30
7.2.3 Current profiles	30
7.3 Power dissipation	33
7.4 Environmental limits	35
7.4.1 Temperature	35
7.4.2 Relative humidity	36
7.4.3 Effective altitude (sea level)	36
7.4.4 Shock and vibration	36
7.4.4.1 Shock	36
7.4.4.2 Vibration	38
7.4.5 Acoustics	39
7.4.6 Air cleanliness	39
7.4.7 Corrosive environment	39
7.4.8 RoHS compliance statement	39
7.4.9 Electromagnetic susceptibility	40
7.5 Mechanical specifications	40
8.0 About FIPS	41
9.0 About self-encrypting drives	42
9.1 Data encryption	42
9.2 Controlled access	42
9.2.1 Admin SP	42
9.2.2 Locking SP	42
9.2.3 Default password	43
9.3 Random number generator (RNG)	43
9.4 Drive locking	43
9.5 Data bands	43
9.6 Cryptographic erase	43
9.7 Authenticated firmware download	43
9.8 Power requirements	44
9.9 Supported commands	44
10.0 Defect and error management	45
10.1 Drive internal defects/errors	45
10.2 Drive error recovery procedures	45
10.3 SAS system errors	47
10.4 Background Media Scan	47
10.5 Media Pre-Scan	48
10.6 Deferred Auto-Reallocation	48
10.7 Idle Read After Write	48
11.0 Installation	49
11.1 Drive orientation	49
11.2 Cooling	49
11.3 Drive mounting	50
11.4 Grounding	50
12.0 Interface requirements	51
12.1 SAS features	51
12.1.1 task management functions	51
12.1.2 task management responses	51
12.2 Dual port support	52
12.3 SCSI commands supported	52
12.3.1 Inquiry data	56
12.3.2 Mode Sense data	57
12.3.2.1 600GBmodel Mode Sense data	58
12.3.2.2 450GB model Mode Sense data	60
12.3.2.3 300GB model Mode Sense data	62
12.4 Miscellaneous operating features and conditions	63
12.4.1 SAS physical interface	64
12.4.2 Physical characteristics	66
12.4.3 Connector requirements	66
12.4.4 Electrical description	67
12.4.5 Pin descriptions	67
12.4.6 SAS transmitters and receivers	68
12.4.7 Power	68
12.5 Signal characteristics	68
12.5.1 Ready LED Out	68
12.5.2 Differential signals	69
12.6 SAS-2 Specification compliance	69
12.7 Additional information	69
Numerics	71
A	71
B	71
C	71
D	71
E	72
F	72
G	72
H	72
I	72
J	72
L	72
M	72
N	73
O	73
P	73
Q	73
R	73
S	73
T	74
U	74
V	74
W	74