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Seagate ST3300655LC Cheetah 15K.6 FC Product Manual - Page 17

Performance characteristics

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4.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.6 FC drives. 4.1 Internal drive characteristics Drive capacity* Read/write data heads Tracks per inch Peak bits per inch Areal density Internal data rate Disc rotation speed Avg rotational latency ST3450856FC ST3450056FC 450 8 150,000 1,100k 165 1.95 15k 2.0 ST3300656FC ST3300056FC 300 6 150,000 1,100k 165 1.95 15k 2.0 ST3146356FC ST3146756FC 146 3 150,000 1,100k 165 1.95 15k 2.0 Gbytes (formatted, rounded off value) TPI BPI Gbits/inch2 Gbits/sec (max) rpm msec *One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. 4.2 Seek performance characteristics See Section 9.5, "FC-AL physical interface" on page 68 and the Fibre Channel Interface Manual (part number 77767496) for additional timing details. 4.2.1 Access time Average Single track Full stroke Typical Typical Typical Not including controller overhead1,2(msec) Read Write 3.4 3.9 0.20 0.44 6.6 7.4 1. Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives. 2. Access to data = access time + latency time. Cheetah 15K.6 FC Product Manual, Rev. D 11

Section	Page
1.0 Scope	7
2.0 Applicable standards and reference documentation	9
2.1 Standards	9
2.1.1 Electromagnetic compatibility	9
2.1.1.1 Electromagnetic susceptibility	9
2.1.2 Electromagnetic compliance	10
2.2 European Union Restriction of Hazardous Substances (RoHS)	10
2.3 Reference documents	11
3.0 General description	13
3.1 Standard features	14
3.2 Media description	15
3.3 Performance	15
3.4 Reliability	15
3.5 Formatted capacities	15
3.5.1 Programmable drive capacity	15
3.6 Factory-installed options	16
3.7 User-installed accessories	16
4.0 Performance characteristics	17
4.1 Internal drive characteristics	17
4.2 Seek performance characteristics	17
4.2.1 Access time	17
4.2.2 Format command execution time (minutes)	18
4.2.3 General performance characteristics	18
4.3 Start/stop time	18
4.4 Prefetch/multi-segmented cache control	19
4.5 Cache operation	19
4.5.1 Caching write data	19
4.5.2 Prefetch operation	20
5.0 Reliability specifications	21
5.1 Error rates	21
5.1.1 Recoverable Errors	21
5.1.2 Unrecoverable Errors	21
5.1.3 Seek errors	22
5.1.4 Interface errors	22
5.2 Reliability and service	22
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)	22
5.2.2 Preventive maintenance	22
5.2.3 Hot plugging the drive	22
5.2.4 S.M.A.R.T.	23
5.2.5 Thermal monitor	24
5.2.6 Drive Self Test (DST)	25
5.2.6.1 DST failure definition	25
5.2.6.2 Implementation	25
5.2.6.2.1 State of the drive prior to testing	25
5.2.6.2.2 Invoking DST	25
5.2.6.2.3 Short and extended tests	26
5.2.6.2.4 Log page entries	26
5.2.6.2.5 Abort	26
5.2.7 Product warranty	27
6.0 Physical/electrical specifications	29
6.1 AC power requirements	29
6.2 DC power requirements	29
6.2.1 Conducted noise immunity	33
6.2.2 Power sequencing	33
6.2.3 Current profiles	33
6.3 Power dissipation	40
6.4 Environmental limits	42
6.4.1 Temperature	42
6.4.2 Relative humidity	43
6.4.3 Effective altitude (sea level)	43
6.4.4 Shock and vibration	44
6.4.4.1 Shock	44
6.4.4.2 Vibration	46
6.4.5 Acoustics	46
6.4.6 Air cleanliness	46
6.4.7 Corrosive environment	46
6.4.8 RoHS compliance statement	47
6.4.9 Electromagnetic susceptibility	47
6.5 Mechanical specifications	48
7.0 Defect and error management	49
7.1 Drive internal defects/errors	49
7.2 Drive error recovery procedures	49
7.3 FC-AL system errors	51
7.4 Background Media Scan	51
7.5 Media Pre-Scan	52
7.6 Deferred Auto-Reallocation	52
7.7 Idle Read After Write	52
8.0 Installation	53
8.1 Drive ID/option selection	53
8.2 Drive orientation	53
8.3 Cooling	53
8.4 Drive mounting	54
8.5 Grounding	54
9.0 Interface requirements	57
9.1 FC-AL features	57
9.1.1 Fibre Channel link service frames	57
9.1.2 Fibre Channel task management functions	58
9.1.3 Fibre Channel task management responses	58
9.1.4 Fibre Channel port login	59
9.1.5 Fibre Channel port login accept	60
9.1.6 Fibre Channel Process Login	60
9.1.7 Fibre Channel Process Login Accept	61
9.1.8 Fibre Channel fabric login	61
9.1.9 Fibre Channel fabric accept login	62
9.1.10 Fibre Channel Arbitrated Loop options	63
9.2 Dual port support	63
9.3 SCSI commands supported	63
9.3.1 Inquiry data	68
9.3.2 Mode Sense data	68
9.4 Miscellaneous operating features and conditions	73
9.5 FC-AL physical interface	74
9.5.1 Physical characteristics	74
9.5.1.1 Physical description	74
9.5.2 Connector requirements	75
9.5.3 Electrical description	75
9.5.4 Pin descriptions	75
9.5.5 FC-AL transmitters and receivers	76
9.5.6 Power	77
9.5.7 Fault LED Out	77
9.5.8 Active LED Out	78
9.5.9 Enable port bypass signals	78
9.5.10 Motor start controls	78
9.5.11 SEL_6 through SEL_0 ID lines	79
9.5.11.1 Parallel Enclosure Services Interface (ESI)	79
9.5.12 Device control codes	81
9.6 Signal characteristics	81
9.6.1 TTL input characteristics	81
9.6.2 LED driver signals	82
9.6.3 FC Differential output	82
9.6.4 FC Differential input	82