Seagate ST400FM0042 Performance impact, Reporting control, Determining rate, Predictive failures

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Performance impact

S.M.A.R.T. attribute data is saved to the media so that the events that caused a predictive failure can be recreated. The drive measures and saves parameters once every hour subject to an idle period on the drive interfaces. The process of measuring off-line attribute data and saving data to the media is interruptible. The maximum on-line only processing delay is summarized below

Maximum processing delay

Fully-enabled delay

DEXCPT = 0

S.M.A.R.T. delay times 75 ms

Reporting control

Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to the reporting method. For example, if the MRIE is set to one, the firmware will issue to the host an 01-5D00 sense code. The FRU field contains the type of predictive failure that occurred. The error code is preserved through bus resets and power cycles.

Determining rate

S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors increases to an unacceptable level. To determine rate, error events are logged and compared to the number of total operations for a given attribute. The interval defines the number of operations over which to measure the rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.

S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of the number of errors for the current interval. This counter is referred to as the Failure Counter.

Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to set thresholds for the number of errors and appropriate interval. If the number of errors exceeds the threshold before the interval expires, the error rate is considered to be unacceptable. If the number of errors does not exceed the threshold before the interval expires, the error rate is considered to be acceptable. In either case, the interval and failure counters are reset and the process starts over.

Predictive failures

S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firmware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accomplish this, a counter is incremented each time the error rate is unacceptable and decremented (not to exceed zero) whenever the error rate is acceptable. If the counter continually increments such that it reaches the predictive threshold, a predictive failure is signaled. This counter is referred to as the Failure History Counter. There is a separate Failure History Counter for each attribute.

5.3.5Thermal monitor

Pulsar.2 drives implement a temperature warning system which:

1.Signals the host if the temperature exceeds a value which would threaten the drive.

2.Signals the host if the temperature exceeds a user-specified value. (i.e., the reference temperature value)

3.Saves a S.M.A.R.T. data frame on the drive which exceeds the threatening temperature value.

A temperature sensor monitors the drive temperature and issues a warning over the interface when the temperature exceeds a set threshold. The temperature is measured at power-up and then at ten-minute intervals after power-up.

The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the specified limit in compliance with the SCSI standard. The drive temperature is reported in the FRU code field of MODE SENSE data. Administrators can use this information to determine if the warning is due to the temperature exceeding the drive threatening temperature or the user-specified temperature.

This feature is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is controlled by the Method of Reporting Informational Exceptions field (MRIE) on the Informational Exceptions Control (IEC) mode page (1Ch).

The current algorithm implements two temperature trip points. The first trip point is set at the maximum temperature limit according to the drive specification. The second trip point is user-selectable using the LOG SELECT command. The reference temperature parameter in the temperature log page (see Table 8) can be used to set this trip point. The default value for this drive is listed in the table, however, applications can set it to any value in the range defined. If a temperature is specified that is greater than the maximum allowed in this field, the temperature is rounded down to the maximum allowed. A sense code is sent to the host to indicate the rounding of the parameter field.

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 LevelElectromagnetic compatibility Applicable Standards and Reference DocumentationElectromagnetic 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 524Logical Block Provisioning Thin Provisioning Product ConfigurationThin 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 Unrecoverable Errors Reliability SpecificationsInterface 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 notesConducted noise immunity Power sequencingCurrent profiles Current profiles for 400GB models Current profiles for 100GB models 400GB models in 6Gb operation 800GB models in 6Gb operation200GB models in 6Gb operation 100GB models in 6Gb operation Environmental LimitsRelative humidity Temperature a. OperatingEffective altitude sea level a. Operating Shock and vibration ShockVibration Air cleanlinessCorrosive 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 Levels of PI Setting and determining the current Type LevelIdentifying 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 status Miscellaneous featuresSAS 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 OutGeneral interface characteristics Differential signals5G 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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