Seagate ST32430N Product Manual - Page 23

Reliability specifications

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Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. A 15 6.0 Reliability specifications The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, and environmental requirements. Seek Errors Read Error Rates [1] Unrecovered Data Miscorrected Data MTBF Service Life Preventive Maintenance Less than 1 in 107 seeks Less than 1 sector in 1014 bits transferred Less than 1 sector in 1021 bits transferred 800,000 hours 5 years None required Note. [1] Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated. 6.1 Error rates The error rates stated in this specification assume the following: a. The drive is operated per this specification using DC Power as defined in this Manual (see Section 7.2). b. The drive has been formatted with the SCSI FORMAT commands. c. Errors caused by media defects or host system failures are excluded from error rate computations. Refer to Paragraph 8.0, Media Characteristics. 6.1.1 Read errors Before determination or measurement of read error rates: a. The data that is to be used for measurement of read error rates must be verified as being written correctly on the media. b. All media defect induced errors must be excluded from error rate calculations. 6.1.2 Environmental interference When evaluating systems operation under conditions of Electromagnetic Interference (EMI), the performance of the drive within the system shall be considered acceptable if the drive does not generate an unrecoverable condition. An unrecoverable error, or condition, is defined as one that: 1. Is not detected and corrected by the drive itself; 2. Is not capable of being detected from the error or fault status provided through the drive or SCSI interface; or 3. Is not capable of being recovered by normal drive or system recovery procedures without operator intervention.

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Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. A
15
_____________________________________________________________________________________
6.0
Reliability specifications
The following reliability specifications assume correct host/drive operational interface, including all interface
timings, power supply voltages, and environmental requirements.
Seek Errors
Less than 1 in 10
7
seeks
Read Error Rates
[1]
Unrecovered Data
Less than 1 sector in 10
14
bits transferred
Miscorrected Data
Less than 1 sector in 10
21
bits transferred
MTBF
800,000 hours
Service Life
5 years
Preventive Maintenance
None required
Note.
[1]
Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.
6.1
Error rates
The error rates stated in this specification assume the following:
a.
The drive is operated per this specification using DC Power as defined in this Manual (see Section 7.2).
b.
The drive has been formatted with the SCSI FORMAT commands.
c.
Errors caused by media defects or host system failures are excluded from error rate computations. Refer
to Paragraph 8.0, Media Characteristics.
6.1.1
Read errors
Before determination or measurement of read error rates:
a.
The data that is to be used for measurement of read error rates must be verified as being written correctly
on the media.
b.
All media defect induced errors must be excluded from error rate calculations.
6.1.2
Environmental interference
When evaluating systems operation under conditions of Electromagnetic Interference (EMI), the performance
of the drive within the system shall be considered acceptable if the drive does not generate an unrecoverable
condition.
An unrecoverable error, or condition, is defined as one that:
1.
Is not detected and corrected by the drive itself;
2.
Is not capable of being detected from the error or fault status provided through the drive or SCSI interface;
or
3.
Is not capable of being recovered by normal drive or system recovery procedures without operator
intervention.