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Reliability specifications

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6.0 Reliability specifications The following reliability specifications assume correct host and drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints. Seek error rate: Read Error Rates Recovered Data Unrecovered Data Miscorrected Data Interface error rate: Annualized Failure Rate (AFR): Preventive maintenance: Less than 10 errors in 108 seeks Less than 10 errors in 1012 bits transferred (OEM default settings) Less than 1 sector in 1016 bits transferred Less than 1 sector in 1021 bits transferred Less than 1 error in 1012 bits transferred with minimum receive eye. Less than 1 error in 1014 bits transferred with typical receive eye. See Section 12.6.4, "FC Differential input." on page 73 0.55% None required 6.1 Error rates The error rates stated in this manual assume the following: • The drive is operated in accordance with this manual using DC power as defined in paragraph 7.2, "DC power requirements." • Errors caused by host system failures are excluded from error rate computations. • Assume random data. • Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write retries and full retry time. • Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated. 6.1.1 Recoverable Errors Recovereable errors are those detected and corrected by the drive, and do not require user intervention. Recoverable Data errors use retries and correction. Application of ECC on-the-fly correction alone is not considered a Recovered Data error. Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a read, and using write bits transferred for recoverable errors occurring during a write. 6.1.2 Unrecoverable Errors Unrecoverable Data Errors (Sense Key = 03h) are specified at less than 1 sector in error per 1016 bits transferred. Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block. 14 Cheetah 15K.7 FC Product Manual, Rev. C

Section	Page
1.0 Seagate Technology support services	7
2.0 Scope	8
3.0 Applicable standards and reference documentation	9
3.1 Standards	9
3.1.1 Electromagnetic compatibility	9
3.1.1.1 Electromagnetic susceptibility	9
3.1.2 Electromagnetic compliance	10
3.2 European Union Restriction of Hazardous Substances (RoHS)	10
3.3 Reference documents	11
4.0 General description	12
4.1 Standard features	13
4.2 Media description	14
4.3 Performance	14
4.4 Reliability	14
4.5 Formatted capacities	14
4.5.1 Programmable drive capacity	15
4.6 Factory-installed options	15
4.7 User-installed accessories	15
5.0 Performance characteristics	16
5.1 Internal drive characteristics	16
5.2 Seek performance characteristics	16
5.2.1 Access time	16
5.2.2 Format command execution time (minutes)	17
5.2.3 General performance characteristics	17
5.3 Start/stop time	17
5.4 Prefetch/multi-segmented cache control	18
5.5 Cache operation	18
5.5.1 Caching write data	19
5.5.2 Prefetch operation	19
6.0 Reliability specifications	20
6.1 Error rates	20
6.1.1 Recoverable Errors	20
6.1.2 Unrecoverable Errors	20
6.1.3 Seek errors	21
6.1.4 Interface errors	21
6.2 Reliability and service	21
6.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)	21
6.2.2 Preventive maintenance	21
6.2.3 Hot plugging the drive	21
6.2.4 S.M.A.R.T.	22
6.2.5 Thermal monitor	23
6.2.6 Drive Self Test (DST)	24
6.2.6.1 DST failure definition	24
6.2.6.2 Implementation	24
6.2.7 Product warranty	26
7.0 Physical/electrical specifications	27
7.1 AC power requirements	27
7.2 DC power requirements	27
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	37
7.4.4.1 Shock	37
7.4.4.2 Vibration	39
7.4.5 Acoustics	39
7.4.6 Air cleanliness	39
7.4.7 Corrosive environment	40
7.4.8 RoHS compliance statement	40
7.4.9 Electromagnetic susceptibility	40
7.5 Mechanical specifications	41
8.0 About FIPS	42
9.0 About self-encrypting drives	43
9.1 Data encryption	43
9.2 Controlled access	43
9.2.1 Admin SP	43
9.2.2 Locking SP	44
9.2.3 Default password	44
9.3 Random number generator (RNG)	44
9.4 Drive locking	44
9.5 Data bands	44
9.6 Cryptographic erase	45
9.7 Authenticated firmware download	45
9.8 Power requirements	45
9.9 Supported commands	45
10.0 Defect and error management	46
10.1 Drive internal defects/errors	46
10.2 Drive error recovery procedures	46
10.3 FC-AL system errors	48
10.4 Background Media Scan	49
10.5 Media Pre-Scan	49
10.6 Deferred Auto-Reallocation	49
10.7 Idle Read After Write	50
11.0 Installation	51
11.1 Drive ID/option selection	51
11.2 Drive orientation	51
11.3 Cooling	52
11.4 Drive mounting	53
11.5 Grounding	53
12.0 Interface requirements	54
12.1 FC-AL features	54
12.1.1 Fibre Channel link service frames	54
12.1.2 Fibre Channel task management functions	55
12.1.3 Fibre Channel task management responses	55
12.1.4 Fibre Channel port login	56
12.1.5 Fibre Channel port login accept	57
12.1.6 Fibre Channel Process Login	57
12.1.7 Fibre Channel Process Login Accept	58
12.1.8 Fibre Channel fabric login	58
12.1.9 Fibre Channel fabric accept login	59
12.1.10 Fibre Channel Arbitrated Loop options	60
12.2 Dual port support	60
12.3 SCSI commands supported	60
12.3.1 Inquiry data	65
12.3.2 Mode Sense data	65
12.4 Miscellaneous operating features and conditions	70
12.5 FC-AL physical interface	71
12.5.1 Physical characteristics	71
12.5.1.1 Physical description	71
12.5.2 Connector requirements	72
12.5.3 Electrical description	72
12.5.4 Pin descriptions	72
12.5.5 FC-AL transmitters and receivers	73
12.5.6 Power	74
12.5.7 Fault LED Out	74
12.5.8 Active LED Out	75
12.5.9 Enable port bypass signals	75
12.5.10 Motor start controls	75
12.5.11 SEL_6 through SEL_0 ID lines	76
12.5.11.1 Parallel Enclosure Services Interface (ESI)	76
12.5.12 Device control codes	78
12.6 Signal characteristics	78
12.6.1 TTL input characteristics	78
12.6.2 LED driver signals	79
12.6.3 FC Differential output	79

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

6.0

Reliability specifications

The following reliability specifications assume correct host and drive operational interface, including all inter-

face timings, power supply voltages, environmental requirements and drive mounting constraints.

6.1

Error rates

The error rates stated in this manual assume the following:

•

The drive is operated in accordance with this manual using DC power as defined in paragraph 7.2, "DC

power requirements."

•

Errors caused by host system failures are excluded from error rate computations.

•

Assume random data.

•

Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write

retries and full retry time.

•

Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.

6.1.1

Recoverable Errors

Recovereable errors are those detected and corrected by the drive, and do not require user intervention.

Recoverable Data errors use retries and correction. Application of ECC on-the-fly correction alone is not con-

sidered a Recovered Data error.

Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a

read, and using write bits transferred for recoverable errors occurring during a write.

6.1.2

Unrecoverable Errors

Unrecoverable Data Errors (Sense Key = 03h) are specified at less than 1 sector in error per 10

bits trans-

ferred. Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block.

Seek error rate:

Less than 10 errors in 10

seeks

Read Error Rates

Recovered Data

Less than 10 errors in 10

bits transferred (OEM default settings)

Unrecovered Data

Less than 1 sector in 10

bits transferred

Miscorrected Data

Less than 1 sector in 10

bits transferred

Interface error rate:

Less than 1 error in 10

bits transferred with minimum receive eye.

Less than 1 error in 10

bits transferred with typical receive eye.

See Section 12.6.4, "FC Differential input." on page 73

Annualized Failure Rate (AFR):

0.55%

Preventive maintenance:

None required