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Seagate ST3300657SS Cheetah 15K.7 FC Product Manual - Page 50

Cooling

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9.3 Cooling The host enclosure must dissipate heat from the drive. You should confirm that the host enclosure is designed to ensure that the drive operates within the temperature measurement guidelines described in Section 6.4.1. In some cases, forced airflow may be required to keep temperatures at or below the temperatures specified in Section 6.4.1. If forced air is necessary, possible air-flow patterns are shown in Figure 10. The air-flow patterns are created by fans either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced airflow patterns are acceptable as long as the temperature measurement guidelines of Section 6.4.1 are met. Above unit Under unit Note. Air flows in the direction shown (back to front) or in reverse direction (front to back) Note. Air flows in the direction shown or in reverse direction (side to side) Figure 10. Air flow Above unit Under unit 44 Cheetah 15K.7 FC Product Manual, Rev. B

Section	Page
1.0 Scope	7
2.0 Applicable standards and reference documentation	8
2.1 Standards	8
2.1.1 Electromagnetic compatibility	8
2.1.1.1 Electromagnetic susceptibility	8
2.1.2 Electromagnetic compliance	9
2.2 European Union Restriction of Hazardous Substances (RoHS)	9
2.3 Reference documents	10
3.0 General description	11
3.1 Standard features	12
3.2 Media description	13
3.3 Performance	13
3.4 Reliability	13
3.5 Formatted capacities	13
3.5.1 Programmable drive capacity	14
3.6 Factory-installed options	14
3.7 User-installed accessories	14
4.0 Performance characteristics	15
4.1 Internal drive characteristics	15
4.2 Seek performance characteristics	15
4.2.1 Access time	15
4.2.2 Format command execution time (minutes)	15
4.2.3 General performance characteristics	16
4.3 Start/stop time	16
4.4 Prefetch/multi-segmented cache control	16
4.5 Cache operation	17
4.5.1 Caching write data	17
4.5.2 Prefetch operation	18
5.0 Reliability specifications	19
5.1 Error rates	19
5.1.1 Recoverable Errors	19
5.1.2 Unrecoverable Errors	19
5.1.3 Seek errors	20
5.1.4 Interface errors	20
5.2 Reliability and service	20
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)	20
5.2.2 Preventive maintenance	20
5.2.3 Hot plugging the drive	20
5.2.4 S.M.A.R.T.	21
5.2.5 Thermal monitor	22
5.2.6 Drive Self Test (DST)	23
5.2.6.1 DST failure definition	23
5.2.6.2 Implementation	23
5.2.7 Product warranty	25
6.0 Physical/electrical specifications	26
6.1 AC power requirements	26
6.2 DC power requirements	26
6.2.1 Conducted noise immunity	29
6.2.2 Power sequencing	29
6.2.3 Current profiles	29
6.3 Power dissipation	32
6.4 Environmental limits	34
6.4.1 Temperature	34
6.4.2 Relative humidity	35
6.4.3 Effective altitude (sea level)	35
6.4.4 Shock and vibration	36
6.4.4.1 Shock	36
6.4.4.2 Vibration	38
6.4.5 Acoustics	38
6.4.6 Air cleanliness	38
6.4.7 Corrosive environment	38
6.4.8 RoHS compliance statement	39
6.4.9 Electromagnetic susceptibility	39
6.5 Mechanical specifications	40
7.0 About self-encrypting drives	41
7.1 Data encryption	41
7.2 Controlled access	41
7.2.1 Admin SP	41
7.2.2 Locking SP	42
7.2.3 Default password	42
7.3 Random number generator (RNG)	42
7.4 Drive locking	42
7.5 Data bands	42
7.6 Cryptographic erase	43
7.7 Authenticated firmware download	43
7.8 Power requirements	43
7.9 Supported commands	43
8.0 Defect and error management	44
8.1 Drive internal defects/errors	44
8.2 Drive error recovery procedures	44
8.3 FC-AL system errors	46
8.4 Background Media Scan	47
8.5 Media Pre-Scan	47
8.6 Deferred Auto-Reallocation	47
8.7 Idle Read After Write	48
9.0 Installation	49
9.1 Drive ID/option selection	49
9.2 Drive orientation	49
9.3 Cooling	50
9.4 Drive mounting	51
9.5 Grounding	51
10.0 Interface requirements	52
10.1 FC-AL features	52
10.1.1 Fibre Channel link service frames	52
10.1.2 Fibre Channel task management functions	53
10.1.3 Fibre Channel task management responses	53
10.1.4 Fibre Channel port login	54
10.1.5 Fibre Channel port login accept	55
10.1.6 Fibre Channel Process Login	55
10.1.7 Fibre Channel Process Login Accept	56
10.1.8 Fibre Channel fabric login	56
10.1.9 Fibre Channel fabric accept login	57
10.1.10 Fibre Channel Arbitrated Loop options	58
10.2 Dual port support	58
10.3 SCSI commands supported	58
10.3.1 Inquiry data	63
10.3.2 Mode Sense data	63
10.4 Miscellaneous operating features and conditions	68
10.5 FC-AL physical interface	69
10.5.1 Physical characteristics	69
10.5.1.1 Physical description	69
10.5.2 Connector requirements	70
10.5.3 Electrical description	70
10.5.4 Pin descriptions	70
10.5.5 FC-AL transmitters and receivers	71
10.5.6 Power	72
10.5.7 Fault LED Out	72
10.5.8 Active LED Out	73
10.5.9 Enable port bypass signals	73
10.5.10 Motor start controls	73
10.5.11 SEL_6 through SEL_0 ID lines	74
10.5.11.1 Parallel Enclosure Services Interface (ESI)	74
10.5.12 Device control codes	76
10.6 Signal characteristics	76
10.6.1 TTL input characteristics	76
10.6.2 LED driver signals	77
10.6.3 FC Differential output	77
10.6.4 FC Differential input	77

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Cheetah 15K.7 FC Product Manual, Rev. B

9.3

Cooling

The host enclosure must dissipate heat from the drive. You should confirm that the host enclosure is designed

to ensure that the drive operates within the temperature measurement guidelines described in Section 6.4.1. In

some cases, forced airflow may be required to keep temperatures at or below the temperatures specified in

Section 6.4.1.

If forced air is necessary, possible air-flow patterns are shown in Figure 10. The air-flow patterns are created

by fans either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-

flow patterns are acceptable as long as the temperature measurement guidelines of Section 6.4.1 are met.

Figure 10.

Air flow

Above unit

Under unit

Note.

Air flows in the direction shown (back to front)

or in reverse direction (front to back)

Above unit

Under unit

Note.

Air flows in the direction shown or

in reverse direction (side to side)