Seagate ST800FM0002, ST100FM0012, ST100FM0052, ST100FM0002 manual Drive Error Recovery Procedures

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9.2DRIVE 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.

9.3SAS SYSTEM ERRORS

Information on the reporting of operational errors across the interface is given in the SAS Interface Manual. 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.

9.4BACKGROUND MEDIA SCAN

Background Media Scan (BMS) is a self-initiated media scan. BMS is defined in the T10 document SPC-4 available from the T10 committee. BMS performs reads across the entire addressable space of the media while the drive is idle. In RAID arrays, BMS allows hot spare drives to be scanned for defects prior to being put into service by the host system. On regular duty drives, if the host system makes use of the BMS Log Page, it can avoid placing data in suspect locations on the media. Unreadable and recovered error sites will be logged and reallocated.

With BMS, the host system can consume less power and system overhead by only checking BMS status and results rather than tying up the bus and consuming power in the process of host-initiated media scanning activity.

Since the background scan functions are only done during idle periods, BMS causes a negligible impact to system performance. The BMS scan is performed after 500ms of idle time. Other features that normally use idle time to function will function normally because BMS functions for bursts of 500ms and then suspends activity for 100ms to allow other background functions to operate.

BMS interrupts immediately to service host commands from the interface bus while performing reads. BMS will complete any BMS-initiated error recovery prior to returning to service host-initiated commands. Overhead associated with a return to host-servicing activity from BMS only impacts the first command that interrupted BMS, this results in a typical delay of about 1ms.

9.5AUTO-REALLOCATION

Auto-Reallocation allows the drive to reallocate unreadable locations on a subsequent write command if the recovery process deems the location to be defective. The drive performs auto-reallocation on every WRITE command. With each write to a Logical LBA, the drive writes the data to a different physical media location. Physical locations that return unrecoverable errors are retired during future WRITE attempts and associated recovery process.

This is in contrast to the system having to use the REASSIGN BLOCKS command to reassign a location that was unreadable and then generate a WRITE command to rewrite the data. This operation requires that AWRE and ARRE are enabled—this is the default setting from the Seagate factory.

PULSAR.2 SAS PRODUCT MANUAL, REV. C

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Contents Pulsar.2 SAS Document Revision History Revision Date Description of changesContents PHYSICAL/ELECTRICAL Specifications Defect and Error ManagementInstallation About Fips About SELF-ENCRYPTING DrivesInterface Requirements Figures Seagate Technology Support Services Scope Standard models Standard SED models Fips 140-2 LevelElectromagnetic susceptibility Applicable Standards and Reference DocumentationElectromagnetic compatibility Electromagnetic compliance Electromagnetic compliance for the European UnionAustralian C-Tick Korean KCCChina Restriction of Hazardous Substances RoHS Directive General Description 800GB 400GB 200GB 100GB 512520 524Thin Provisioning capabilities Thin Provisioning Product ConfigurationLogical Block Provisioning Format Unit command PI and SED Drive ConfigurationUnmap Protection Information PI and Security SEDPerformance Characteristics Format Mode Dcrt Bit IP Bit 800GB 400GB 200GB 100GBAccess time Typical Access Time μsecPerformance Managed Life Warranty Performance Usage Based WarrantyST800FM00 ST400FM00 ST200FM00 ST100FM00 PerformanceCaching write data Interface errors Reliability SpecificationsUnrecoverable Errors SSD Percentage Used Endurance Indicator Wear LevelingGarbage Collection Write AmplificationPreventive maintenance Hot plugging the drive4 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Reporting controlDetermining rate Predictive failuresTemperature Log Page 0Dh Parameter Code Description 800/400/200/100GBProduct warranty Managed Life WarrantyUsage Based Warranty Extended test Function Code 010bPHYSICAL/ELECTRICAL Specifications Power consumptionStartup power 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 notesCurrent profiles Power sequencingConducted noise immunity Current profiles for 400GB models Current profiles for 100GB models 200GB models in 6Gb operation 800GB models in 6Gb operation400GB models in 6Gb operation 100GB models in 6Gb operation Environmental LimitsEffective altitude sea level a. Operating Temperature a. OperatingRelative humidity Shock and vibration ShockCorrosive environment Air cleanlinessVibration Weight Pounds 160 grams Weight Pounds 100 grams Purpose Validation ProgramSeagate Enterprise SED Security LevelAdmin SP Default passwordAbout SELF-ENCRYPTING Drives Locking SPData Bands Defect and Error Management SSD Physical format address descriptorDrive Error Recovery Procedures Identifying a Protection Information drive Setting and determining the current Type LevelLevels of PI Installation Physical interfaceX = F 15lb = 67N Interface Requirements Task management functionsSAS task management functions supported 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 SAS physical interface Miscellaneous featuresMiscellaneous status Datum B Section C C Section a a Physical characteristics Connector requirementsElectrical description Pin descriptionsPower LED drive signalSAS transmitters and receivers Ready LED Out5G B/ S 0G B/ S Differential signalsGeneral interface characteristics 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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