Seagate (ST16000NM002G) - Инструкция по эксплуатации - Страница 18

Seagate Exos X16 SAS Product Manual, Rev. K

17 

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Reliability specifications

5.2

Reliability and service

Users can enhance the reliability of Exos X16 disk drives by ensuring that the drive receives adequate cooling. 

Section 6.0

 provides temperature

measurements and other information that may be used to enhance the service life of the drive. Section 

Table 10.2

 provides recommended air-

flow information.

5.2.1

Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)

The production disk drive shall achieve an annualized failure-rate of 0.35% (MTBF of 2,500,000 hours) over a 5 year service life when used in

Enterprise Storage field conditions as limited by the following:
• 8760 power-on hours per year.
• HDA temperature as reported by the drive <= 30°C
• Ambient wet bulb temp <= 26°C
• Typical  workload
• The AFR (MTBF) is a population statistic not relevant to individual units
• ANSI/ISA S71.04-2013 G2 classification levels and dust contamination to ISO 14644-1 Class 8 standards (as measured at the device)

The MTBF specification for the drive assumes the operating environment is designed to maintain nominal drive temperature and humidity. 
Occasional excursions in operating conditions between the rated MTBF conditions and the maximum drive operating conditions may occur 
without significant impact to the rated MTBF. However continual or sustained operation beyond the rated MTBF conditions will degrade the drive

MTBF and reduce product reliability.

5.2.2

Hot plugging the drive

When a disk is powered on by switching the power or hot plugged, the drive runs a self test before attempting to communicate on its’ interfaces. 
When the self test completes successfully, the drive initiates a Link Reset starting with OOB. An attached device should respond to the link reset. If 
the link reset attempt fails, or any time the drive looses sync, the drive initiated link reset. The drive will initiate link reset once per second but 
alternates between port A and B. Therefore each port will attempt a link reset once per 2 seconds assuming both ports are out of sync.

If the self-test fails, the drive does not respond to link reset on the failing port.

It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard, or ESD potential hazard is presented during

the hot connect/disconnect operation. Discharge the static electricity from the drive carrier prior to inserting it into the system.

Nonrecoverable read errors

1 per 10

15

 bits read, max

Load unload cycles

600,000 cycles

Maximum Rated Workload

Maximum rate of <550TB/year



Workloads exceeding the annualized rate may degrade the drive MTBF and impact product 
reliability. The Annualized Workload Rate is in units of TB per year, or TB per 8760 power on

hours. Workload Rate = TB transferred * (8760 / recorded power on hours).

Warranty

To determine the warranty for a specific drive, use a web browser to access the following web

page: 

http://www.seagate.com/support/warranty-and-replacements/

.

From this page, click on the “Is my Drive under Warranty” link. The following are required to be

provided: the drive serial number, model number (or part number) and country of purchase. 
The system will display the warranty information for the drive.

Preventive maintenance

None required.

Caution

The drive motor must come to a complete stop prior to changing the 
plane of operation. This time is required to insure data integrity.