Seagate ST800FM0053 Seagate 1200 SSD Product Manual - Page 54

S

EAGATE

1200 SSD P

RODUCT

M

ANUAL

, R

EV

. A

48

9.0

D

EFECT AND ERROR MANAGEMENT

Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to

increase data integrity, perform drive self-maintenance, and validate proper drive operation.

SCSI defect and error management involves drive internal defect/error management and SAS system error considerations

(errors in communications between the initiator and the drive). In addition, Seagate provides the following technologies used

to increase data integrity and drive reliability:

•

Auto-Reallocation (see Section 9.4)

The read error rates and specified storage capacities are not dependent on host (initiator) defect management routines.

9.1

D

RIVE INTERNAL DEFECTS

/

ERRORS

During the initial drive manufacturing test operation at the factory, media defects are identified, tagged as being unusable,

and their locations recorded on the drive primary defects list (referred to as the “P’ list). At factory format time, these known

defects are also deallocated, that is, marked as retired and the location listed in the defects reallocation table. The “P” list is

not altered after factory formatting. Locations of defects found and reallocated during error recovery procedures after drive

shipment are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the READ

DEFECT DATA command.

Details of the SCSI commands supported by the drive are described in the

SAS Interface Manual

. Also, more information on

the drive Error Recovery philosophy is presented in the


.

The drive uses a vendor unique format to report defects via the READ DEFECT DATA command pending T10

standardization of a format for Solid State Devices. This format defect type is defined as 110b in the SCSI FORMAT UNIT

command. The definition of the 110b format is defined in the following table.

Table 12SSD Physical format address descriptor

Bit

Byte

7

6

5

4

3

2

1

0

0

(MSB)

MEDIA ID

1

(LSB)

2

CHANNEL

3

DIE

4

(MSB)

BLOCK

5

(LSB)

6

RESERVED

7

VENDOR UNIQUE

The MEDIA ID field contains an identifier for the flash controller for devices that utilize more than one flash controller.

The CHANNEL field contains the channel number within the corresponding Flash Controller.

The DIE field contains the die number within channel.

The BLOCK field contains the block number within the die.

The VENDOR UNIQUE field may contain vendor unique information.

9.2

D

RIVE ERROR RECOVERY PROCEDURES

When an error occurs during drive operation, the drive performs error recovery procedures to attempt to recover the data.

The error recovery procedures used are not user changeable.

9.3

SAS

SYSTEM ERRORS

Information on the reporting of operational errors across the interface is given in the


. The SSP

Response returns information to the host about numerous kinds of errors. The Receive Diagnostic Results reports the results

of diagnostic operations performed by the drive.

Status returned by the drive to the initiator is described in the

SAS Interface Manual.

Status reporting plays a role in systems

error management and its use in that respect is described in sections where the various commands are discussed.

Section	Page
Seagate® 1200 SSD	1
Seagate Technology Support Services	7
1.0 Scope	8
2.0 Applicable standards and reference documentation	9
2.1 Standards	9
2.1.1 Electromagnetic compatibility	9
2.1.2 Electromagnetic compliance	9
2.1.3 European Union Restriction of Hazardous Substances (RoHS)	10
2.1.4 China Restriction of Hazardous Substances (RoHS) Directive	10
2.2 Reference documents	11
3.0 General description	12
3.1 Standard features	12
3.2 Media description	13
3.3 Performance	13
3.4 Reliability	13
3.5 Formatted capacities	13
3.6 Programmable drive capacity	14
3.7 Factory-installed options	14
3.8 Thin Provisioning	14
3.8.1 Logical Block Provisioning	14
3.8.2 Thin Provisioning capabilities	14
3.8.3 UNMAP	14
3.8.4 FORMAT UNIT command	15
3.8.5 Protection Information (PI) and Security (SED)	15
4.0 Performance characteristics	16
4.1 Internal drive characteristics	16
4.2 Performance characteristics	16
4.2.1 Response time	16
4.2.2 FORMAT UNIT command execution time for 512-byte LBA’s (minutes)	17
4.2.3 Performance	17
4.3 Start/stop time	19
4.4 Cache control	20
4.4.1 Caching write data	20
4.4.2 Prefetch operation	20
5.0 Reliability specifications	21
5.1 Error rates	22
5.1.1 Unrecoverable Errors	22
5.1.2 Interface errors	22
5.2 Endurance Management	22
5.2.1 Wear Leveling	22
5.2.2 Garbage Collection	22
5.2.3 Write Amplification	22
5.2.4 UNMAP	22
5.2.5 Data Retention	23
5.2.6 Lifetime Endurance Management (Available on select models)	23
5.2.7 SSD Percentage Used Endurance Indicator	23
5.3 Reliability and service	23
5.3.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	23
5.3.2 Preventive maintenance	23
5.3.3 Hot plugging the drive	23
5.3.4 S.M.A.R.T.	24
5.3.5 Thermal monitor	25
5.3.6 Drive Self Test (DST)	25
5.3.7 Product warranty	27
6.0 Physical/electrical specifications	28
6.1 Power specifications	28
6.1.1 Power consumption	28
6.2 AC power requirements	28
6.3 DC power requirements	29
6.3.1 Conducted noise immunity	37
6.3.2 Power sequencing	37
6.3.3 Current profiles	37
6.4 Power dissipation	40
6.5 Environmental limits	44
6.5.1 Temperature	44
6.5.2 Relative humidity	45
6.5.3 Effective altitude (sea level)	45
6.5.4 Shock and vibration	45
6.5.5 Air cleanliness	47
6.5.6 Corrosive environment	47
6.5.7 Electromagnetic susceptibility	47
6.6 Mechanical specifications	48
7.0 About FIPS	50
8.0 About self-encrypting drives	51
8.1 Data encryption	51
8.2 Controlled access	51
8.2.1 Admin SP	51
8.2.2 Locking SP	51
8.2.3 Default password	51
8.3 Random number generator (RNG)	51
8.4 Drive locking	52
8.5 Data bands	52
8.6 Cryptographic erase	52
8.7 Authenticated firmware download	52
8.8 Power requirements	53
8.9 Supported commands	53
8.10 Sanitize - Cryptographic Erase	53
8.11 RevertSP	53
8.12 Sanitize Feature Set on SED Drives	53
9.0 Defect and error management	54
9.1 Drive internal defects/errors	54
9.2 Drive error recovery procedures	54
9.3 SAS system errors	54
9.4 Auto-Reallocation	55
9.5 Protection Information (PI)	55
9.5.1 Levels of PI	55
9.5.2 Setting and determining the current Type Level	55
9.5.3 Identifying a Protection Information drive	55
10.0 Installation	56
10.1 Drive orientation	56
10.2 Cooling	56
10.3 Drive mounting	57
10.4 Grounding	57
11.0 Interface requirements	58
11.1 SAS features	58
11.1.1 Task management functions	58
11.1.2 Task management responses	58
11.2 Dual port support	58
11.3 SCSI commands supported	59
11.3.1 INQUIRY data	63
11.3.2 MODE SENSE data	64
11.4 Miscellaneous operating features and conditions	69
11.4.1 SAS physical interface	69
11.4.2 Physical characteristics	74
11.4.3 Connector requirements	74
11.4.4 Electrical description	74
11.4.5 Pin descriptions	74
11.4.6 SAS transmitters and receivers	75
11.4.7 Power	76
11.5 Signal characteristics	76
11.5.1 Ready LED Out	76
11.5.2 Differential signals	77
11.6 SAS-3 Specification compliance	77
11.7 Additional information	77
Numerics	78
A	78
B	78
C	78
D	78
E	78
F	79
G	79
H	79
I	79
J	79
L	79
M	79
N	80
O	80
P	80
Q	80
R	80
S	80
T	81
U	81
V	81
W	81

Seagate ST800FM0053 Seagate 1200 SSD Product Manual - Page 54

Defect And Error Management

Page 54 highlights