Seagate ST2000NM0063 사용자 설명서

C

ONSTELLATION 

ES.1 SAS P

RODUCT 

M

ANUAL

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Constellation ES.1 drives implement a temperature warning system which:
1.

Signals the host if the temperature exceeds a value which would threaten the drive.

2.

Signals the host if the temperature exceeds a user-specified value.

3.

Saves a S.M.A.R.T. data frame on the drive which exceeds the threatening temperature value.

A temperature sensor monitors the drive temperature and issues a warning over the interface when the temperature exceeds a set 
threshold. The temperature is measured at power-up and then at ten-minute intervals after power-up.

The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the specified limit in compliance with 
the SCSI standard. The drive temperature is reported in the FRU code field of mode sense data. You can use this information to determine 
if the warning is due to the temperature exceeding the drive threatening temperature or the user-specified temperature.

This feature is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is controlled by the Method of Reporting 
Informational Exceptions field (MRIE) on the Informational Exceptions Control (IEC) mode page (1Ch).

The current algorithm implements two temperature trip points. The first trip point is set at 65°C which is the maximum temperature limit 
according to the drive specification. The second trip point is user-selectable using the Log Select command. The reference temperature 
parameter in the temperature log page (see Table 1) can be used to set this trip point. The default value for this drive is 65°C, however, you 
can set it to any value in the range of 0 to 65°C. If you specify a temperature greater than 65°C in this field, the temperature is rounded 
down to 65°C. A sense code is sent to the host to indicate the rounding of the parameter field.

Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a failed unit. DST validates the 
functionality of the drive at a system level. 

There are two test coverage options implemented in DST:
1.

Extended test

2.

Short test

The most thorough option is the extended test that performs various tests on the drive and scans every logical block address (LBA) of the 
drive. The short test is time-restricted and limited in length—it does not scan the entire media surface, but does some fundamental tests 
and scans portions of the media. 

If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test, remove it from service and 
return it to Seagate for service.

The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log page if a functional failure is 
encountered during DST. The channel and servo parameters are not modified to test the drive more stringently, and the number of retries 
are not reduced. All retries and recovery processes are enabled during the test. If data is recoverable, no failure condition will be reported 
regardless of the number of retries required to recover the data.

The following conditions are considered DST failure conditions:
• Seek error after retries are exhausted
• Track-follow error after retries are exhausted
• Read error after retries are exhausted
• Write error after retries are exhausted

Recovered errors will not be reported as diagnostic failures.

0000h

Primary Temperature

0001h

Reference Temperature