Seagate ST800FM0012, ST100FM0012, ST100FM0052, ST100FM0002, ST200FM0012 manual Caching write data

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Sustained performance is defined as the worst case performance that the product will be able to achieve when the product is preconditioned as mentioned and host commands are aligned on 4KB boundaries. For models that support Lifetime Endurance Management, write values also take into account the worst case performance throttling that may occur to ensure the product meets specified reliability specifications.

Due to the nature of Flash memory technologies there are many factors that can result in values different than those stated in this specification. Some discrepancies can be caused by bandwidth limitations in the host adapter, operating system, or driver limitations. It is not the intent of this manual to cover all possible causes of performance discrepancies.

When evaluating performance of SSD devices, it is recommended to measure performance of the device in a method that resembles the targeted application using real world data and workloads. Test time should also be adequately large to ensure that sustainable metrics and measures are obtained.

4.3START/STOP TIME

The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied.

If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command with the START bit equal to 0, the drive becomes ready for normal operations within 15 seconds (excluding the error recovery procedure).

If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the drive becomes ready for normal operations within 15 seconds (excluding the error recovery procedure).

If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.

The START STOP UNIT command may be used to command the drive to stop. Stop time is 3 seconds (maximum) from removal of DC power. SCSI stop time is 3 seconds. There is no power control switch on the drive.

4.4CACHE CONTROL

All default cache mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Table 20 and 21.

4.4.1Caching write data

Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored while the drive performs the WRITE command.

If the number of write data logical blocks exceed the size of the segment being written into, when the end of the segment is reached, the data is written into the beginning of the same cache segment, overwriting the data that was written there at the beginning of the operation; however, the drive does not overwrite data that has not yet been written to the medium.

If write caching is enabled (WCE=1), then the drive may return Good status on a WRITE command after the data has been transferred into the cache, but before the data has been written to the medium. If an error occurs while writing the data to the medium, and Good status has already been returned, a deferred error will be generated.

Data that has not been written to the medium is protected by a back up power source which provides the ability of the data to be written to non-volatile medium in the event of an unexpected power loss.

The SYNCHRONIZE CACHE command may be used to force the drive to write all cached write data to the medium. Upon completion of a SYNCHRONIZE CACHE command, all data received from previous WRITE commands will have been written to the medium. Tables 19, 20 and 21 show the mode default settings for the drive.

PULSAR.2 SAS PRODUCT MANUAL, REV. C

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Contents Pulsar.2 SAS Document Revision History Revision Date Description of changesContents Installation PHYSICAL/ELECTRICAL SpecificationsDefect and Error Management About Fips About SELF-ENCRYPTING DrivesInterface Requirements Figures Seagate Technology Support Services Scope Standard models Standard SED models Fips 140-2 LevelApplicable Standards and Reference Documentation Electromagnetic compatibilityElectromagnetic susceptibility Australian C-Tick Electromagnetic complianceElectromagnetic compliance for the European Union Korean KCCChina Restriction of Hazardous Substances RoHS Directive General Description 520 800GB 400GB 200GB 100GB512 524Thin Provisioning Product Configuration Logical Block ProvisioningThin Provisioning capabilities Unmap Format Unit commandPI and SED Drive Configuration Protection Information PI and Security SEDAccess time Performance CharacteristicsFormat Mode Dcrt Bit IP Bit 800GB 400GB 200GB 100GB Typical Access Time μsecST800FM00 ST400FM00 ST200FM00 ST100FM00 Performance Managed Life WarrantyPerformance Usage Based Warranty PerformanceCaching write data Reliability Specifications Unrecoverable ErrorsInterface errors Garbage Collection SSD Percentage Used Endurance IndicatorWear Leveling Write Amplification4 S.M.A.R.T Preventive maintenanceHot plugging the drive Controlling S.M.A.R.TDetermining rate Performance impactReporting control Predictive failuresTemperature Log Page 0Dh Parameter Code Description 800/400/200/100GBUsage Based Warranty Product warrantyManaged Life Warranty Extended test Function Code 010bStartup power PHYSICAL/ELECTRICAL SpecificationsPower consumption Peak operating mode800GB standard model DC power requirements 800GB 6.0GB400GB standard model DC power requirements 400GB 6.0GB200GB standard model DC power requirements 200GB 6.0GB100GB standard model DC power requirements General DC power requirement notesPower sequencing Conducted noise immunityCurrent profiles Current profiles for 400GB models Current profiles for 100GB models 800GB models in 6Gb operation 400GB models in 6Gb operation200GB models in 6Gb operation 100GB models in 6Gb operation Environmental LimitsTemperature a. Operating Relative humidityEffective altitude sea level a. Operating Shock and vibration ShockAir cleanliness VibrationCorrosive environment Weight Pounds 160 grams Weight Pounds 100 grams Seagate Enterprise SED PurposeValidation Program Security LevelAbout SELF-ENCRYPTING Drives Admin SPDefault password Locking SPData Bands Defect and Error Management SSD Physical format address descriptorDrive Error Recovery Procedures Setting and determining the current Type Level Levels of PIIdentifying a Protection Information drive Installation Physical interfaceX = F 15lb = 67N SAS task management functions supported Interface RequirementsTask management functions Task management responsesSupported commands Format UnitPersistent Reserve Reassign Blocks Write and Verify Inquiry data Pulsar.2 Inquiry dataMode Sense data Mode Pages Mode Sense data for 800GB drivesMode Sense data for 400GB drives Mode Sense data for 200GB drives Mode Sense values for 100GB drives Miscellaneous features Miscellaneous statusSAS physical interface Datum B Section C C Section a a Electrical description Physical characteristicsConnector requirements Pin descriptionsSAS transmitters and receivers PowerLED drive signal Ready LED OutDifferential signals General interface characteristics5G B/ S 0G B/ S Index Index SAS See also cooling Seagate Technology LLC Americas

ST800FM0002, ST100FM0002, ST200FM0002, ST400FM0012, ST800FM0032 specifications

The Seagate ST100FM0012, ST800FM0012, ST400FM0042, ST400FM0002, and ST100FM0052 are high-performance hard drives designed for enterprise applications, offering advanced features and reliability for demanding workloads.

The ST100FM0012 is a 10TB hard drive that strikes a balance between capacity and performance. It utilizes a 7200 RPM spindle speed and features a 256MB cache, enabling efficient data access and enhanced read/write performance. With Seagate’s AgileArray technology, the ST100FM0012 is optimized for NAS environments, providing multi-drive reliability and error recovery.

The ST800FM0012 is an 8TB variant that shares many features with its 10TB counterpart but is tailored for organizations needing robust storage without reaching the highest tier of capacity. Its dual-plane rotational vibration technology minimizes vibration in multi-drive systems, ensuring sustained performance over prolonged use. This makes it an excellent choice for virtualization and data-intensive applications.

The ST400FM0042 offers a 4TB capacity suited for smaller enterprise needs or as a backup solution. With an impressive performance profile, including a 7200 RPM speed and 128MB cache, it accommodates both sequential and random workloads with ease. This drive stands out with its PowerChoice technology, allowing users to manage power consumption and reduce operational costs.

Another 4TB option, the ST400FM0002, is particularly designed for hybrid configurations, pairing the fast access of the hard drive with the speed of SSDs. It features Seagate's advanced thermal management technologies, ensuring optimal operating temperatures and performance stability during intensive workloads.

The ST100FM0052 rounds out the lineup with a 10TB capacity but is specifically aimed at surveillance applications. It supports a workload rate of 180TB per year, making it ideal for always-on recording scenarios. The drive is built with optimized firmware, which ensures enhanced performance in write-intensive environments, essential for video recording and security systems.

All these drives are equipped with Seagate’s proprietary technologies, including data recovery services and built-in data protection features, ensuring data integrity and security. The drives are built for durability, reliability, and high performance in mission-critical environments, making them indispensable components of modern enterprise data storage solutions. With capacities ranging from 4TB to 10TB, they cater to varying storage needs across different sectors.
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