Seagate ST800FM0022 Pulsar.2 SAS Product Manual - Page 14

P

ULSAR

.2 SAS P

RODUCT

M

ANUAL

, R

EV

. C

8

3.6

P

ROGRAMMABLE DRIVE CAPACITY

Using the MODE SELECT command, the drive can change its capacity to something less than maximum. See the MODE SELECT (6)

parameter list table in the

SAS Interface Manual

, part number 100293071. A value of zero in the Number of Blocks field indicates that the

drive will not change the capacity it is currently formatted to have. A number other than zero and less than the maximum number of LBAs

in the Number of Blocks field changes the total drive capacity to the value in the Number of Blocks field. A value greater than the maximum

number of LBAs is rounded down to the maximum capacity.

3.7

F

ACTORY

-

INSTALLED OPTIONS

OEMs may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping.

Some of the options available are (not an exhaustive list of possible options):

•

Other capacities can be ordered depending on sparing scheme and LBA size requested.

•

Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units

shipped individually require additional protection as provided by the single unit shipping pack. Users planning single unit distribution

should specify this option.

• The

Safety and Regulatory Agency Specifications

, part number 75789512, is usually included with each standard OEM drive shipped,

but extra copies may be ordered.

3.8

T

HIN

P

ROVISIONING

3.8.1

Logical Block Provisioning

The drive is designed with a feature called Thin Provisioning.

Thin Provisioning is a technique which does not require Logical Blocks to be

associated to Physical Blocks on the storage medium until such a time as needed.

The use of Thin Provisioning is a major factor in SSD

products because it reduces the amount of wear leveling and garbage collection that must be performed.

The result is an increase in the

products endurance.

For more details on Logical Block Provisioning and Thin Provisioning, Reference the SBC-3 document provided by

the T-10 committee.

3.8.2

Thin Provisioning capabilities

The level of Thin Provisioning support may vary by product model. Devices that support Thin Provisioning are allowed to return a default

data pattern for read requests made to Logical Blocks that have not been mapped to Physical Blocks by a previous WRITE command.

In order to determine if Thin Provisioning is supported and what features of it are implemented requires the system to send a READ

CAPACITY 16 (9Eh) command to the drive. Thin Provisioning and the READ CAPACITY 16 (9Eh) command is defined in the Seagate

SCSI Command Reference 100293068..

A logical block provisioning management enabled (LBPME) bit set to one indicates that the logical unit implements logical block

provisioning management. An LBPME bit set to zero indicates that the logical unit is fully provisioned and does not implement logical block

provisioning management.

A logical block provisioning read zeros (LBPRZ) bit set to one indicates that, for an unmapped LBA specified by a read operation, the

device server sends user data with all bits set to zero to the data-in buffer. An LBPRZ bit set to zero indicates that, for an unmapped LBA

specified by a read operation, the device server may send user data with all bits set to any value to the data-in buffer.

Table 2

Thin Provisioning Product Configuration

Product Configuration

LBPME

LBPRZ

Non-SED

Supported

Supported

SED

Supported

Not Supported

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 14

Logical Block Provisioning, Thin Provisioning capabilities

Page 14 highlights