Seagate ST800FM0022 Pulsar.2 SAS Product Manual - Page 15

P

ULSAR

.2 SAS P

RODUCT

M

ANUAL

, R

EV

. C

9

3.8.3

UNMAP

The UNMAP command requests that the device server break the association of a specific Logical Block

address from a Physical Block,

thereby freeing up the Physical Block from use and no longer requiring it

to contain user data.

An unmapped block will respond to a READ

command with data that is determined by

the setting of the LBPRZ bit in the READ CAPACITY parameter data.

3.8.4

FORMAT UNIT command

A device which supports Thin Provisioning will be capable of performing a SCSI FORMAT UNIT command which allocates Logical Blocks

Addresses that are not linked to Physical Block Locations. A FORMAT command will cause all LBAs to become unmapped.

3.8.5

Protection Information (PI) and Security (SED)

The requirements in this section apply to any device which supports LBA unmapping.

In SCSI devices, umapped LBAs are defined as part of the Thin Provisioning model. Support of the Thin Provisioning model is indicated by

the LBPME bit having a value of '1' in the READ CAPACITY (16) parameter data.

When a region of LBA's are erased via cryptographic erase, as part of the erase, the drive shall unmap those LBAs.

If the host attempts to access an unmapped or trimmed LBA, the drive shall return scrambled data. For a given LBA, the data shall be

identical from access to access, until that LBA is either updated with actual data from the host or that LBA is cryptographically erased. The

drive shall report a value of '0' in the LBPRZ field returned in the READ CAPACITY (16) parameter data.

If the host attempts to access an unmapped LBA on a drive that has been formatted with Protection Information (PI), the drive shall return

scrambled PI data for that LBA. Depending on the value of the RDPROTECT field in the data-access command CDB, this may result in the

drive returning a standard PI error to the host.

If the host reduces the addressable capacity of the drive via a MODE SELECT command, the drive shall unmap or trim any LBA within the

inaccessible region of the device.

Additionally, an UNMAP command is not permitted on a locked band.

Table 3

PI and SED Drive Configuration

D

RIVE

C

ONFIGURATION

Standard

SED

PI Setting

Disabled

Enabled

Disabled

Enabled

PROT_EN bit

0

1

0

1

LBPME bit

1

1

1

1

LBPRZ bit

1

1

0

0

PI Check Requested

N/A

Yes

No

N/A

Yes

No

DATA Returned for

Thin Provisioned LBA

0x00

0x00

0x00

Random

None

Random

PI Returned for

Thin Provisioned LBA

None

0xFF

0xFF

None

None

Scrambled

PI data

PI Check Performed

N/A

No

No

N/A

Yes

No

Error reported to Host

No

No

No

No

Yes

No

Section	Page
Pulsar®.2 SAS	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	10
2.1.3 European Union Restriction of Hazardous Substances (RoHS)	10
2.1.4 China Restriction of Hazardous Substances (RoHS) Directive	11
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	15
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 Access time	16
4.2.2 FORMAT UNIT command execution time for 512-byte LBA’s (minutes)	16
4.2.3 Performance	17
4.3 Start/stop time	18
4.4 Cache control	18
4.4.1 Caching write data	18
5.0 Reliability specifications	19
5.1 Error rates	19
5.1.1 Unrecoverable Errors	19
5.1.2 Interface errors	19
5.2 Endurance Management	20
5.2.1 Wear Leveling	20
5.2.2 Garbage Collection	20
5.2.3 Write Amplification	20
5.2.4 UNMAP	20
5.2.5 Data Retention	20
5.2.6 Lifetime Endurance Management (Available on select models)	20
5.2.7 SSD Percentage Used Endurance Indicator	20
5.3 Reliability and service	21
5.3.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	21
5.3.2 Preventive maintenance	21
5.3.3 Hot plugging the drive	21
5.3.4 S.M.A.R.T.	21
5.3.5 Thermal monitor	22
5.3.6 Drive Self Test (DST)	23
5.3.7 Product warranty	24
6.0 Physical/electrical specifications	25
6.1 Power specifications	25
6.1.1 Power consumption	25
6.2 AC power requirements	25
6.3 DC power requirements	26
6.3.1 Conducted noise immunity	30
6.3.2 Power sequencing	30
6.3.3 Current profiles	30
6.4 Power dissipation	33
6.5 Environmental limits	34
6.5.1 Temperature	35
6.5.2 Relative humidity	35
6.5.3 Effective altitude (sea level)	35
6.5.4 Shock and vibration	36
6.5.5 Air cleanliness	37
6.5.6 Corrosive environment	37
6.5.7 Electromagnetic susceptibility	37
6.6 Mechanical specifications	38
7.0 About FIPS	40
8.0 About self-encrypting drives	41
8.1 Data encryption	41
8.2 Controlled access	41
8.2.1 Admin SP	41
8.2.2 Locking SP	41
8.2.3 Default password	41
8.3 Random number generator (RNG)	41
8.4 Drive locking	41
8.5 Data bands	42
8.6 Cryptographic erase	42
8.7 Authenticated firmware download	42
8.8 Power requirements	42
8.9 Supported commands	42
8.10 Sanitize - Cryptographic Erase	42
8.11 RevertSP	42
8.12 Sanitize Feature Set on SED Drives	42
9.0 Defect and error management	43
9.1 Drive internal defects/errors	43
9.2 Drive error recovery procedures	44
9.3 SAS system errors	44
9.4 Background Media Scan	44
9.5 Auto-Reallocation	44
9.6 Protection Information (PI)	45
9.6.1 Levels of PI	45
9.6.2 Setting and determining the current Type Level	45
9.6.3 Identifying a Protection Information drive	45
10.0 Installation	46
10.1 Drive orientation	46
10.2 Cooling	46
10.3 Drive mounting	47
10.4 Grounding	47
11.0 Interface requirements	48
11.1 SAS features	48
11.1.1 Task management functions	48
11.1.2 Task management responses	48
11.2 Dual port support	48
11.3 SCSI commands supported	49
11.3.1 INQUIRY data	53
11.3.2 MODE SENSE data	54
11.4 Miscellaneous operating features and conditions	59
11.4.1 SAS physical interface	59
11.4.2 Physical characteristics	62
11.4.3 Connector requirements	62
11.4.4 Electrical description	62
11.4.5 Pin descriptions	62
11.4.6 SAS transmitters and receivers	63
11.4.7 Power	63
11.5 Signal characteristics	63
11.5.1 Ready LED Out	63
11.5.2 Differential signals	64
11.6 SAS-2 Specification compliance	64

Seagate ST800FM0022 Pulsar.2 SAS Product Manual - Page 15

Thin Provisioned LBA

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