Seagate ST3300457FC Cheetah 15K.7 SAS Product Manual - Page 23

Cheetah 15K.7 SAS Product Manual, Rev. C

17

can be used to set this trip point. The default value for this drive is 68°C, however, you can set it to any value in

the range of 0 to 68°C. If you specify a temperature greater than 68°C in this field, the temperature is rounded

down to 68°C. A sense code is sent to the host to indicate the rounding of the parameter field.

6.2.6

Drive Self Test (DST)

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.

6.2.6.1

DST failure definition

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.

6.2.6.2

Implementation

This section provides all of the information necessary to implement the DST function on this drive.

6.2.6.2.1

State of the drive prior to testing

The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons

why a drive may not be ready, some of which are valid conditions, and not errors. For example, a drive may be

in process of doing a format, or another DST. It is the responsibility of the host application to determine the “not

ready” cause.

While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a

failed drive.

A Drive Not Ready condition is reported by the drive under the following conditions:

Table 12:

Temperature Log Page (0Dh)

Parameter Code

Description

0000h

Primary Temperature

0001h

Reference Temperature

Section	Page
1.0 Seagate Technology support services	7
2.0 Scope	8
3.0 Standards, compliance and reference documents	9
3.1 Standards	9
3.1.1 Electromagnetic compatibility	9
3.1.1.1 Electromagnetic susceptibility	9
3.2 Compliance	10
3.2.1 Electromagnetic compliance	10
3.3 European Union Restriction of Hazardous Substances (RoHS)	10
3.4 Reference documents	11
4.0 General description	12
4.1 Standard features	13
4.2 Media description	13
4.3 Performance	13
4.4 Reliability	14
4.5 Formatted capacities	14
4.6 Programmable drive capacity	14
4.7 Factory-installed options	14
5.0 Performance characteristics	15
5.1 Internal drive characteristics	15
5.2 Seek time	15
5.2.1 Access time	15
5.2.2 Format command execution time (minutes)	16
5.2.3 General performance characteristics	16
5.3 Start/stop time	16
5.4 Prefetch/multi-segmented cache control	17
5.5 Cache operation	17
5.5.1 Caching write data	18
5.5.2 Prefetch operation	18
6.0 Reliability specifications	19
6.1 Error rates	19
6.1.1 Recoverable Errors	19
6.1.2 Unrecoverable Errors	19
6.1.3 Seek errors	20
6.1.4 Interface errors	20
6.2 Reliability and service	20
6.2.1 Annualized Failrue Rate (AFR) and Mean time between failure (MTBF)	20
6.2.2 Preventive maintenance	20
6.2.3 Hot plugging the drive	20
6.2.4 S.M.A.R.T.	21
6.2.5 Thermal monitor	22
6.2.6 Drive Self Test (DST)	23
6.2.6.1 DST failure definition	23
6.2.6.2 Implementation	23
6.2.7 Product warranty	25
7.0 Physical/electrical specifications	26
7.1 AC power requirements	26
7.2 DC power requirements	26
7.2.1 Conducted noise immunity	30
7.2.2 Power sequencing	30
7.2.3 Current profiles	30
7.3 Power dissipation	33
7.4 Environmental limits	35
7.4.1 Temperature	35
7.4.2 Relative humidity	36
7.4.3 Effective altitude (sea level)	36
7.4.4 Shock and vibration	36
7.4.4.1 Shock	36
7.4.4.2 Vibration	38
7.4.5 Acoustics	39
7.4.6 Air cleanliness	39
7.4.7 Corrosive environment	39
7.4.8 RoHS compliance statement	39
7.4.9 Electromagnetic susceptibility	40
7.5 Mechanical specifications	40
8.0 About FIPS	41
9.0 About self-encrypting drives	42
9.1 Data encryption	42
9.2 Controlled access	42
9.2.1 Admin SP	42
9.2.2 Locking SP	42
9.2.3 Default password	43
9.3 Random number generator (RNG)	43
9.4 Drive locking	43
9.5 Data bands	43
9.6 Cryptographic erase	43
9.7 Authenticated firmware download	43
9.8 Power requirements	44
9.9 Supported commands	44
10.0 Defect and error management	45
10.1 Drive internal defects/errors	45
10.2 Drive error recovery procedures	45
10.3 SAS system errors	47
10.4 Background Media Scan	47
10.5 Media Pre-Scan	48
10.6 Deferred Auto-Reallocation	48
10.7 Idle Read After Write	48
11.0 Installation	49
11.1 Drive orientation	49
11.2 Cooling	49
11.3 Drive mounting	50
11.4 Grounding	50
12.0 Interface requirements	51
12.1 SAS features	51
12.1.1 task management functions	51
12.1.2 task management responses	51
12.2 Dual port support	52
12.3 SCSI commands supported	52
12.3.1 Inquiry data	56
12.3.2 Mode Sense data	57
12.3.2.1 600GBmodel Mode Sense data	58
12.3.2.2 450GB model Mode Sense data	60
12.3.2.3 300GB model Mode Sense data	62
12.4 Miscellaneous operating features and conditions	63
12.4.1 SAS physical interface	64
12.4.2 Physical characteristics	66
12.4.3 Connector requirements	66
12.4.4 Electrical description	67
12.4.5 Pin descriptions	67
12.4.6 SAS transmitters and receivers	68
12.4.7 Power	68
12.5 Signal characteristics	68
12.5.1 Ready LED Out	68
12.5.2 Differential signals	69
12.6 SAS-2 Specification compliance	69
12.7 Additional information	69
Numerics	71
A	71
B	71
C	71
D	71
E	72
F	72
G	72
H	72
I	72
J	72
L	72
M	72
N	73
O	73
P	73
Q	73
R	73
S	73
T	74
U	74
V	74
W	74

Seagate ST3300457FC Cheetah 15K.7 SAS Product Manual - Page 23

Temperature Log Dh

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