Seagate ST32000646SS Constellation ES.2 SAS Product Manual - Page 23

Constellation ES.2 SAS Product Manual, Rev. C

15

6.1.3

Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an

initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails,

a seek positioning error (Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense

Key.

Recoverable seek errors are specified at Less than 10 errors in 10

8

seeks. Unrecoverable seek errors

(Sense Key = 04h) are classified as drive failures.

6.1.4

Interface errors

An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the

device port connected to the receiver. The error may be detected as a running disparity error, illegal code, loss

of word sync, or CRC error.

6.2

Reliability and service

You can enhance the reliability of Constellation ES.2 disk drives by ensuring that the drive receives adequate

cooling. Section 7.0 provides temperature measurements and other information that may be used to enhance

the service life of the drive. Section 11.2 provides recommended air-flow information.

6.2.1

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

The production disk drive shall achieve an AFR of 0.73% (MTBF of 1,200,000 hours) when operated in an

environment that ensures the HDA case temperatures do not exceed the values specified in Section 7.5.

Operation at case temperatures outside the specifications in Section 7.5 may increase the product AFR

(decrease the MTBF). The AFR (MTBF) is a population statistic not relevant to individual units.

The AFR (MTBF) specification is based on the following assumptions for Enterprise Storage System

environments:

•

8760 power-on hours per year.

•

250 average on/off cycles per year.

•

Operations at nominal voltages.

• Systems will provide adequate cooling to ensure the case temperatures specified in Section 7.5 are not

exceeded. Temperatures outside the specifications in Section 7.5 will increase the product AFR and

decrease the MTBF.

6.2.2

Preventive maintenance

No routine scheduled preventive maintenance is required.

6.2.3

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.

Note.

It is the responsibility of the systems integrator to assure that no temperature, energy, voltage haz-

ard, 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.

Section	Page
1.0 Seagate Technology support services	9
2.0 Scope	10
3.0 Applicable standards and reference documentation	11
3.1 Standards	11
3.1.1 Electromagnetic compatibility	11
3.1.1.1 Electromagnetic susceptibility	11
3.1.2 Electromagnetic compliance	12
3.1.3 European Union Restriction of Hazardous Substances (RoHS)	13
3.1.4 China Restriction of Hazardous Substances (RoHS) Directive	13
3.2 Reference documents	14
4.0 General description	15
4.1 Standard features	16
4.2 Media description	16
4.3 Performance	16
4.4 Reliability	17
4.5 Formatted capacities	17
4.6 Programmable drive capacity	17
4.7 Factory-installed options	17
5.0 Performance characteristics	18
5.1 Internal drive characteristics	18
5.2 Seek performance characteristics	18
5.2.1 Access time	18
5.2.2 Format command execution time for 512-byte sectors (minutes)	19
5.2.3 General performance characteristics	19
5.3 Start/stop time	19
5.4 Prefetch/multi-segmented cache control	20
5.5 Cache operation	20
5.5.1 Caching write data	21
5.5.2 Prefetch operation	21
6.0 Reliability specifications	22
6.1 Error rates	22
6.1.1 Recoverable Errors	22
6.1.2 Unrecoverable Errors	22
6.1.3 Seek errors	23
6.1.4 Interface errors	23
6.2 Reliability and service	23
6.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	23
6.2.2 Preventive maintenance	23
6.2.3 Hot plugging the drive	23
6.2.4 S.M.A.R.T.	24
6.2.5 Thermal monitor	25
6.2.6 Drive Self Test (DST)	26
6.2.6.1 DST failure definition	26
6.2.6.2 Implementation	26
6.2.7 Product warranty	28
7.0 Physical/electrical specifications	29
7.1 PowerChoiceTM power management	29
7.1.1 PowerChoice reporting methods	30
7.2 AC power requirements	30
7.3 DC power requirements	30
7.3.1 Conducted noise immunity	32
7.3.2 Power sequencing	32
7.3.3 Current profiles	33
7.4 Power dissipation	34
7.5 Environmental limits	36
7.5.1 Temperature	36
7.5.2 Relative humidity	36
7.5.3 Effective altitude (sea level)	37
7.5.4 Shock and vibration	37
7.5.4.1 Shock	37
7.5.4.2 Vibration	39
7.5.5 Acoustics	39
7.5.6 Air cleanliness	39
7.5.7 Corrosive environment	39
7.5.8 Electromagnetic susceptibility	40
7.6 Mechanical specifications	41
8.0 About FIPS	42
9.0 About self-encrypting drives	43
9.1 Data encryption	43
9.2 Controlled access	43
9.2.1 Admin SP	43
9.2.2 Locking SP	43
9.2.3 Default password	44
9.3 Random number generator (RNG)	44
9.4 Drive locking	44
9.5 Data bands	44
9.6 Cryptographic erase	44
9.7 Authenticated firmware download	45
9.8 Power requirements	45
9.9 Supported commands	45
9.10 RevertSP	45
10.0 Defect and error management	46
10.1 Drive internal defects/errors	46
10.2 Drive error recovery procedures	46
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
10.8 Protection Information (PI)	49
10.8.1 Levels of PI	49
10.8.2 Setting and determining the current Type Level	49
10.8.3 Identifying a Protection Information drive	49
11.0 Installation	50
11.1 Drive orientation	50
11.2 Cooling	51
11.3 Drive mounting	52
11.4 Grounding	52
12.0 Interface requirements	53
12.1 SAS features	53
12.1.1 task management functions	53
12.1.2 task management responses	53
12.2 Dual port support	54
12.3 SCSI commands supported	55
12.3.1 Inquiry data	59
12.3.2 Mode Sense data	59
12.4 Miscellaneous operating features and conditions	62
12.4.1 SAS physical interface	63
12.4.2 Physical characteristics	66
12.4.3 Connector requirements	66
12.4.4 Electrical description	66
12.4.5 Pin descriptions	66
12.4.6 SAS transmitters and receivers	67
12.4.7 Power	67
12.5 Signal characteristics	67
12.5.1 Ready LED Out	67
12.5.2 Differential signals	68
12.6 SAS-2 Specification Compliance	68
12.7 Additional information	68
Numerics	69
A	69
B	69
C	69
D	69
E	70
F	70
G	70
H	70
I	70
J	70
K	70
L	71
M	71
N	71
O	71
P	71
Q	72
R	72
S	72
T	72
U	73
V	73
W	73

Seagate ST32000646SS Constellation ES.2 SAS Product Manual - Page 23

Seek errors, Interface errors, Annualized Failure Rate AFR and Mean Time Between Failure MTBF,

Page 23 highlights