Seagate ST400FX0002 Performance characteristics, Internal drive characteristics, Access time

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5.0Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Pul- sar XT.2 drives.

Note. Data provided is based on format at 512-bytes.

5.1Internal drive characteristics

	ST400FX0002	ST200FX0002	ST100FX0002
	ST400FX0012
Drive capacity	400	200	100	GB (formatted, rounded off value)
Flash Memory Type	NAND SLC
Emulated LBA Size	512, 520, 524, 528, 4096, 4160, 4192, or 4224
Native Programmable Page Size	4096 User Bytes
Default Transfer Alignment Offset	0

5.2Performance characteristics

See Section 11.4.1, "SAS physical interface" and the SAS Interface Manual (part number 100293071) for addi- tional timing details.

5.2.1Access time

Access measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows:

•Page-to-page access time is an average of all possible page-to-page accesses in both directions for a sequentially preconditioned drive.

•Average access time is a true statistical random average of at least 5000 measurements of accesses between programmable pages on a randomly preconditioned drive.

Table 4: Typical Access Time (µsec)

			400GB 1,2		100/200 GB1,2
		Read		Write	Read	Write

Average		268		133	208	121
	Typical 3
Page to Page	Typical 3	268		133	207	121
Average Latency		247			188

1.Execution time measured from receipt of the Command to the Response.

2.Assumes no errors.

3.Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives.

Note. These drives are designed to provide the highest possible performance under typical conditions. However, due to the nature of Flash memory technologies there are many factors that can result in values different than those stated in this specification

2.

Pulsar XT.2 SAS Product Manual, Rev. B

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Contents Standard Models Self-Encrypting Drive Models ST400FX0002ST400FX0012 ST200FX0002 ST100FX0002Revision history Contents About self-encrypting drives Physical/electrical specificationsDefect and error management InstallationPage Pulsar XT.2 SAS Product Manual, Rev. B List of Figures Page Seagate Online Support and Services Seagate Technology support servicesScope Electromagnetic susceptibility Applicable standards and reference documentationStandards Electromagnetic compatibilityKorean KCC Electromagnetic complianceElectromagnetic compliance for the European Union Australian C-TickChina Restriction of Hazardous Substances RoHS Directive Reference documentsGeneral description Standard featuresPerformance Media descriptionReliability Formatted capacities Factory-installed optionsProgrammable drive capacity Thin Provisioning Drive Configuration Access time Performance characteristicsInternal drive characteristics Performance characteristicsPerformance Format Mode Dcrt Bit IP Bit 400GB 200GB 100GBCache control Start/stop timeCaching write data Error rates Reliability specificationsEndurance Management Lifetime Endurance Management Reliability and servicePreventive maintenance Data RetentionPerformance impact Maximum processing delay Fully-enabled delay4 S.M.A.R.T Controlling S.M.A.R.TThermal monitor Predictive failuresImplementation State of the drive prior to testingDrive Self Test DST DST failure definitionLog page entries Short and extended testsShort test Function Code 001b Extended test Function Code 010bStorage Product warrantyShipping Product repair and return informationPower specifications Physical/electrical specificationsAC power requirements 400GB standard model DC power requirements DC power requirements200GB standard model DC power requirements 100GB standard model DC power requirements Current profiles General DC power requirement notesPower sequencing Conducted noise immunityCurrent profiles for 200GB models 400GB models in 6Gb operation Power dissipation200GB models in 6Gb operation Environmental limits Temperature a. Operating100GB models in 6Gb operation Effective altitude sea level a. Operating Relative humidityShock and vibration Recommended mounting ShockVibration a. Operating-normal Air cleanlinessCorrosive environment Mounting configuration dimensions 400GB models Mechanical specificationsWeight Pounds 100 grams Data encryption Controlled accessAdmin SP About self-encrypting drivesData bands Default passwordRandom number generator RNG Drive lockingCryptographic erase Authenticated firmware downloadPower requirements Supported commandsDrive internal defects/errors Defect and error managementSSD Physical format address descriptor Bit Byte Auto-Reallocation Drive error recovery proceduresSAS system errors Background Media ScanIdentifying a Protection Information drive Setting and determining the current Type LevelProtection Information PI Levels of PIDrive orientation InstallationAir flow CoolingGrounding Drive mountingInterface requirements SAS featuresDual port support Supported commands Scsi commands supportedPersistent Reserve Read Capacity Write Inquiry data Mode Sense dataPage 14 1a 00 1a Mode Sense data for 400GB drivesMode Pages Mode Sense data for 200GB drivesMode Sense values for 100GB drives SAS physical interface Miscellaneous operating features and conditionsMiscellaneous features Miscellaneous statusDatum B Section C C Section a a Pin descriptions Physical characteristicsConnector requirements Electrical descriptionReady LED Out Signal characteristicsPower SAS transmitters and receiversGeneral interface characteristics SAS-2 Specification complianceLED drive signal Differential signalsNumerics IndexPage RNG See also cooling Page Americas Seagate Technology LLC