Seagate ST1000NM0033 manual Defect and Error Management, Drive Internal DEFECTS/ERRORS

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9.0DEFECT AND ERROR MANAGEMENT

Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to increase data integrity, perform drive self-maintenance, and validate proper drive operation.

SCSI defect and error management involves drive internal defect/error management and SAS system error considerations (errors in communications between the initiator and the drive). In addition, Seagate provides the following technologies used to increase data integrity and drive reliability:

•Background Media Scan (see Section 9.4)

•Media Pre-Scan (see Section 9.5)

•Deferred Auto-Reallocation (see Section 9.6)

•Idle Read After Write (see Section 9.7)

The read error rates and specified storage capacities are not dependent on host (initiator) defect management routines.

9.1DRIVE INTERNAL DEFECTS/ERRORS

During the initial drive format operation at the factory, media defects are identified, tagged as being unusable, and their locations recorded on the drive primary defects list (referred to as the “P’ list and also as the ETF defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place on the medium and the location listed in the defects reallocation table. The “P” list is not altered after factory formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the Read Defect Data command.

Details of the SCSI commands supported by the drive are described in the SAS Interface Manual. Also, more information on the drive Error Recovery philosophy is presented in the SAS Interface Manual.

9.2DRIVE ERROR RECOVERY PROCEDURES

When an error occurs during drive operation, the drive, if programmed to do so, performs error recovery procedures to attempt to recover the data. The error recovery procedures used depend on the options previously set in the Error Recovery Parameters mode page. Error recovery and defect management may involve using several SCSI commands described in the SAS Interface Manual. The drive implements selectable error recovery time limits required in video applications.

The error recovery scheme supported by the drive provides a way to control the total error recovery time for the entire command in addition to controlling the recovery level for a single LBA. The total amount of time spent in error recovery for a command can be limited using the Recovery Time Limit bytes in the Error Recovery mode page. The total amount of time spent in error recovery for a single LBA can be limited using the Read Retry Count or Write Retry Count bytes in the Error Recovery mode page.

The drive firmware error recovery algorithms consist of 12 levels for read recoveries and five levels for write. Each level may consist of multiple steps, where a step is defined as a recovery function involving a single re-read or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the read and write retry counts.

Table 6 equates the read and write retry count with the maximum possible recovery time for read and write recovery of individual LBAs. The times given do not include time taken to perform reallocations. Reallocations are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the recovery time limit for the command has not yet been met. Time needed to perform reallocation is not counted against the recovery time limit.

When the RC bit is one, reallocations are disabled even if the ARRE or AWRE bits are one. The drive will still perform data recovery actions within the limits defined by the Read Retry Count, Write Retry Count, and Recovery Time Limit parameters. However, the drive does not report any unrecovered errors.

CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. B

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Contents Constellation ES.3 SAS Document Revision History Contents Installation Contents Seagate Technology Support Services Scope SEDApplicable Standards and Reference Documentation StandardsTaiwanese Bsmi Australian C-TickKorean KCC European Union Restriction of Hazardous Substances RoHSChina Restriction of Hazardous Substances RoHS Directive Reference DocumentsGeneral Description Media Description Standard FeaturesPerformance Formatted Capacities FACTORY-INSTALLED OptionsReliability Programmable Drive CapacityFormat command execution time for 512-byte sectors minutes Performance CharacteristicsInternal Drive Characteristics General performance characteristicsPREFETCH/MULTI-SEGMENTED Cache Control START/STOP TimeCache Operation Caching write data Prefetch operationError Rates Reliability SpecificationsReliability and Service Hot plugging the drive 3 S.M.A.R.TReporting control Controlling S.M.A.R.TPerformance impact Determining rateDST failure definition State of the drive prior to testingDrive Self Test DST ImplementationShort test Function Code 001b Invoking DSTShort and extended tests Extended test Function Code 010bStorage Product warrantyShipping Product repair and return informationPowerchoicetm Power Management PHYSICAL/ELECTRICAL SpecificationsPowerChoice modes AC Power Requirements DC Power Requirements4TB drive DC power requirements 3TB drive DC power requirements 2TB drive DC power requirements 1TB drive DC power requirements Power sequencing General DC power requirement notesConducted noise immunity Current profiles TB model current profilesTB model current profiles TB model current profiles TB model current profiles 4TB models in 3Gb operation Power Dissipation4TB models in 6Gb operation 3TB models in 3Gb operation 3TB models in 6Gb operation2TB models in 3Gb operation 2TB models in 6Gb operation1TB models in 3Gb operation 1TB models in 6Gb operationImage is for reference only, may not represent actual drive Temperature a. OperatingEnvironmental Limits Relative humidityShock and vibration ShockRecommended mounting Acoustics Air cleanlinessVibration Corrosive environmentMechanical Specifications 1TBSeagate Enterprise SED PurposeValidation Program Security LevelData Encryption Controlled AccessAbout SELF-ENCRYPTING Drives Random Number Generator RNGSupported Commands Authenticated Firmware DownloadPower Requirements Data BandsDrive Internal DEFECTS/ERRORS Defect and Error ManagementDrive Error Recovery Procedures SAS System Errors Background Media ScanIdle Read After Write Media PRE-SCANDeferred AUTO-REALLOCATION Protection Information PISetting and determining the current Type Level Identifying a Protection Information driveDrive Orientation InstallationCooling Drive Mounting X = F 15lb = 67NGrounding Task management functions SAS FeaturesInterface Requirements Task management responsesScsi Commands Supported Supported commands Supported commands Supported commands Inquiry data Constellation ES.3 inquiry dataMode Sense data Block Descriptor CHG 9C 0A 9D 0F FF FF FF FF FF FF FF FF DEF 12 1400 FF FF 00 00 FF FF FF FF 80 20 00 00 00 00 00 Miscellaneous Operating Features and Conditions Miscellaneous featuresSAS physical interface Datum B Section C C Section a a Electrical description Physical characteristicsConnector requirements Pin descriptionsSAS transmitters and receivers PowerSignal Characteristics Ready LED OutSAS-2 Specification Compliance Differential signalsAdditional Information Index Page KCC See also cooling Page Seagate Technology LLC
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ST1000NM0033 specifications

The Seagate ST1000NM0033 is a high-performance hard disk drive (HDD) designed specifically for enterprise applications. With a storage capacity of 1TB, it offers a balance of performance, reliability, and efficiency, making it suitable for data centers, cloud storage, and server environments. Built with Seagate's robust engineering, the ST1000NM0033 is ideal for handling heavy workloads and intensive data processes.

One of the standout features of this HDD is its rotational speed of 7200 RPM. This speed allows for quick data access and fast read/write operations, which is essential for data-intensive applications. The drive is equipped with 64MB of cache, further enhancing its efficiency by speeding up data retrieval for frequently accessed files.

Another key characteristic of the ST1000NM0033 is its SATA interface, which typically facilitates high-bandwidth data transfer rates. With a sustained data transfer rate of up to 160 MB/s, it ensures that large files, such as videos and databases, can be transferred swiftly, minimizing downtime and improving overall system performance.

The drive's durability is backed by Seagate’s Advanced Format technology, which enhances the format compatibility, storage efficiency, and reliability of the drive through improved error correction. With a mean time between failures (MTBF) rating of 1 million hours, users can trust the STA0033 to provide exceptional longevity and stability, critical in enterprise environments where data integrity is paramount.

Furthermore, the ST1000NM0033 supports various workload types due to its design optimized for multi-user environments. The drive can handle up to 180TB/year workload rate, making it capable of supporting applications with high data demand.

Environmentally, Seagate ensures that this model is energy efficient, contributing to reduced power consumption in enterprise settings. The drive operates effectively within a specified temperature range, ensuring that it remains operational under different environmental conditions.

In summary, the Seagate ST1000NM0033 is an excellent choice for businesses seeking a reliable, high-capacity HDD with robust performance features. Its combination of speed, efficiency, durability, and capacity positions it as a strong contender in the enterprise storage solutions market. With its extensive feature set, it continues to cater to the demanding needs of modern data centers and enterprise applications.
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