Seagate ST400FX0002 Pulsar XT.2 SAS Product Manual - Page 22

14

Pulsar XT.2 SAS Product Manual, Rev. B

6.0

Reliability specifications

The following reliability specifications assume correct host and drive operational interface, including all inter-

face timings, power supply voltages, environmental requirements and drive mounting constraints.

6.1

Error rates

The error rates stated in this manual assume the following:

• The drive is operated in accordance with this manual using DC power as defined in paragraph 7.3, "DC

power requirements."

•

Errors caused by host system failures are excluded from error rate computations.

•

Assume random data.

• Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write

retries and full retry time.

Read Error Rates

1

1.

Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.

2.

As NAND Flash devices age with use, the capability of the media to retain a programmed value begins to deteriorate.

This deterioration is affected by the number of times a particular memory cell is programmed and subsequently erased.

When a device is new, it has a powered off data retention capability of up to several years. With use the retention ca-

pability of the device is reduced. Temperature also has an effect on how long a Flash component can retain its pro-

grammed value with power removed. At high temperature the retention capabilities of the device are reduced. Data

retention is not an issue with power applied to the SSD. The SSD drive contains firmware and hardware features that

can monitor and refresh memory cells when power is applied.

3.

Endurance rating is the expected amount of host data that can be written by product when subjected to a specified work-

load at a specified operating and storage temperature. For the specific workload to achieve this level of endurance,

please reference JEDEC Specification JESD218. TBW is defined as 1x10^12 Bytes.

Unrecovered Data

Less than 1 LBA in 10

16

bits transferred

Miscorrected Data

Less than 1 LBA in 10

21

bits transferred

Interface error rate:

Less than 1 error in 10

12

bits transferred

Mean Time Between Failure (MTBF):

2,000,000 hours

Annualized Failure Rate (AFR):

0.44%

Preventive maintenance:

None required

Typical Data Retention with

Power removed (at 40C)

2

3 months

Endurance Rating:

3

Method 1: Full drive writes per day

35

Method 2: TBW (per JEDEC JESD218

400GB = 24,800 TB

200GB = 12,400 TB

100GB = 6,200 TB

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)	12
3.1.4 China Restriction of Hazardous Substances (RoHS) Directive	13
3.2 Reference documents	13
4.0 General description	14
4.1 Standard features	14
4.2 Media description	15
4.3 Performance	15
4.4 Reliability	15
4.5 Formatted capacities	16
4.6 Programmable drive capacity	16
4.7 Factory-installed options	16
4.8 Thin Provisioning	17
4.8.1 Logical Block Provisioning	17
4.8.2 Thin Provisioning capabilities	17
4.8.3 UNMAP	17
4.8.4 FORMAT UNIT command	17
4.8.5 Protection Information (PI) and Security (SED)	17
5.0 Performance characteristics	19
5.1 Internal drive characteristics	19
5.2 Performance characteristics	19
5.2.1 Access time	19
5.2.2 FORMAT UNIT command execution time for 512-byte LBA’s (minutes)	20
5.2.3 Performance	20
5.3 Start/stop time	21
5.4 Cache control	21
5.4.1 Caching write data	21
6.0 Reliability specifications	22
6.1 Error rates	22
6.1.1 Unrecoverable Errors	23
6.1.2 Interface errors	23
6.2 Endurance Management	23
6.2.1 Wear Leveling	23
6.2.2 Garbage Collection	23
6.2.3 Write Amplification	23
6.2.4 UNMAP	23
6.2.5 Data Retention	24
6.2.6 Lifetime Endurance Management	24
6.3 Reliability and service	24
6.3.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	24
6.3.2 Preventive maintenance	24
6.3.3 Hot plugging the drive	24
6.3.4 S.M.A.R.T.	25
6.3.5 Thermal monitor	26
6.3.6 Drive Self Test (DST)	27
6.3.6.1 DST failure definition	27
6.3.6.2 Implementation	27
6.3.7 Product warranty	29
7.0 Physical/electrical specifications	30
7.1 Power specifications	30
7.1.1 Power consumption	30
7.2 AC power requirements	30
7.3 DC power requirements	31
7.3.1 Conducted noise immunity	34
7.3.2 Power sequencing	34
7.3.3 Current profiles	34
7.4 Power dissipation	36
7.5 Environmental limits	37
7.5.1 Temperature	37
7.5.2 Relative humidity	38
7.5.3 Effective altitude (sea level)	38
7.5.4 Shock and vibration	38
7.5.4.1 Shock	39
7.5.4.2 Vibration	40
7.5.5 Air cleanliness	40
7.5.6 Corrosive environment	40
7.5.7 Electromagnetic susceptibility	40
7.6 Mechanical specifications	41
8.0 About self-encrypting drives	43
8.1 Data encryption	43
8.2 Controlled access	43
8.2.1 Admin SP	43
8.2.2 Locking SP	44
8.2.3 Default password	44
8.3 Random number generator (RNG)	44
8.4 Drive locking	44
8.5 Data bands	44
8.6 Cryptographic erase	45
8.7 Authenticated firmware download	45
8.8 Power requirements	45
8.9 Supported commands	45
8.10 RevertSP	45
9.0 Defect and error management	46
9.1 Drive internal defects/errors	46
9.2 Drive error recovery procedures	47
9.3 SAS system errors	47
9.4 Background Media Scan	47
9.5 Auto-Reallocation	47
9.6 Protection Information (PI)	48
9.6.1 Levels of PI	48
9.6.2 Setting and determining the current Type Level	48
9.6.3 Identifying a Protection Information drive	48
10.0 Installation	49
10.1 Drive orientation	49
10.2 Cooling	50
10.3 Drive mounting	51
10.4 Grounding	51
11.0 Interface requirements	52
11.1 SAS features	52
11.1.1 Task management functions	52
11.1.2 Task management responses	52
11.2 Dual port support	53
11.3 SCSI commands supported	54
11.3.1 INQUIRY data	58
11.3.2 MODE SENSE data	58
11.4 Miscellaneous operating features and conditions	63
11.4.1 SAS physical interface	63
11.4.2 Physical characteristics	66
11.4.3 Connector requirements	66
11.4.4 Electrical description	66
11.4.5 Pin descriptions	66
11.4.6 SAS transmitters and receivers	67
11.4.7 Power	67
11.5 Signal characteristics	67
11.5.1 Ready LED Out	67
11.5.2 Differential signals	68
11.6 SAS-2 Specification compliance	68
11.7 Additional information	68
Numerics	69
A	69
B	69
C	69
D	69
E	69
F	70
G	70
H	70
I	70
J	70
L	70
M	70
N	71
O	71
P	71
Q	71
R	71
S	71
T	72
U	72
V	72
W	72

Seagate ST400FX0002 Pulsar XT.2 SAS Product Manual - Page 22

Reliability specifications

Page 22 highlights