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5.0
R
ELIABILITY 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:
1
Read Error Rates
Recovered Data
Unrecovered Data
Miscorrected Data
Interface error rate:
Mean Time Between Failure (MTBF):
Annualized Failure Rate (AFR):
Preventive maintenance:
1.
Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.
5.1
E
RROR 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 6.3, "DC power require-
ments."
• 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.
5.1.1
Recoverable Errors
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.
5.1.2
Unrecoverable Errors
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.
5.1.3
Seek errors
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
5.1.4
Interface errors
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.
S
E
P
EAGATE
NTERPRISE
ERFORMANCE
Less than 10 errors in 10
Less than 10 error in 10
Less than 1 sector in 10
Less than 1 sector in 10
Less than 1 error in 10
2,000,000 hours
0.44%
None required
8
seeks. Unrecoverable seek errors (Sense Key = 04h) are classified as drive failures.
10K HDD
7 P
M
V
RODUCT
8
seeks
12
bits transferred (OEM default settings)
16
bits transferred
21
bits transferred
12
bits transferred
, R
. C
ANUAL
EV
12
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