Seagate Cheetah 10K.7 SCSI Spezifikationen PDF herunterladen (Seite 27)

Cheetah 10K.7 SCSI Product Manual, Rev. D 17

5.0 Reliability specifications

The following reliability specifications assume correct host/drive operational interface, including all interface

timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4).

Note.

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

5.1 Error rates

The error rates stated in this specification assume the following:

• The drive is operated per this specification using DC power as defined in this manual (see Section 6.2).

• 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

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

Recoverable Data errors will use correction, although ECC on-the-fly is not considered for purposes of recov-

ered error specifications.

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

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 are 1 error for that block.

Seek Errors

Less than 10 in 10

seeks

Read Error Rates [1]

Recovered Data Less than 10 errors in 10

bits transferred (OEM default settings)

Unrecovered Data Less than 1 sector in 10

bits transferred (OEM default settings)

Miscorrected Data Less than 1 sector in 10

bits transferred

AFR 0.62%

Service Life 5 years

Preventive Maintenance None required

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 109 110

Keine Kommentare

Seagate Cheetah 10K.7 SCSI Spezifikationen Seite 27