Seagate ST1200MM0017 ユーザーズマニュアル

S

EAGATE 

E

NTERPRISE 

P

ERFORMANCE 

10K HDD 

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7  P

RODUCT 

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ANUAL

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EV

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The following reliability specifications assume correct host and drive operational interface, including all interface timings, 
power supply voltages, environmental requirements and drive mounting constraints.  

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 6.3, "DC power require-

• 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.

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

Recoverable Data errors will use Error Correction when needed.

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.

An unrecoverable data error is defined as a failure of the drive to recover data from the media. These errors occur due to 
head/media or write problems. Unrecoverable data errors are only detected during read operations, but not caused by the 
read. If an unrecoverable data error is detected, a MEDIUM ERROR (03h) in the Sense Key will be reported. Multiple 
unrecoverable data errors resulting from the same cause are treated as 1 error.

A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an initial seek 
error, the drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning error 
(Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense Key.   Recoverable seek errors are 
specified at Less than 10 errors in 10

8

 seeks. Unrecoverable seek errors (Sense Key = 04h) are classified as drive failures.

An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the device port 
connected to the receiver. The error may be detected as a running disparity error, illegal code, loss of word sync, or CRC 
error. 

Seek error rate:

Less than 10 errors in 10

8 

seeks

Read Error Rates

1

1.

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

Recovered Data

Less than 10 error in 10

12

 bits transferred (OEM default settings)

Unrecovered Data

Less than 1 sector in 10

16

 bits transferred

Miscorrected Data

Less than 1 sector in 10

21

 bits transferred

Interface error rate:

Less than 1 error in 10

12

 bits transferred 

Mean Time Between Failure (MTBF):

2,000,000 hours

Annualized Failure Rate (AFR):

0.44%

Preventive maintenance:

None required