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Seagate ST3450657FC, ST3300557FC, ST3300457FC, ST3300657FC, ST3450857FC manual Idle Read After Write

Models: ST3600057FC ST3450857FC ST3600857FC ST3450757FC ST3300657FC ST3300457FC ST3300557FC ST3600957FC ST3450657FC

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10.7Idle Read After Write

Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods, no active system requests, the drive reads recently written data from the media and compares it to valid write command data resident in the drives data buffer. Any sectors that fail the comparison result in the invocation of a rewrite and auto-reallocation process. The process attempts to rewrite the data to the original location. If a verification of this rewrite fails, the sector is re-mapped to a spare location.

44	Cheetah 15K.7 FC Product Manual, Rev. C

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Seagate ST3450657FC, ST3300557FC, ST3300457FC, ST3300657FC, ST3450857FC, ST3450757FC, ST3600057FC manual Idle Read After Write

Contents

SED Fips 140-2 models ST3600857FC ST3450657FC ST3300457FCStandard models Self-Encrypting Drive models Page Contents About Fips About self-encrypting drives Defect and error managementInstallation Interface requirements Cheetah 15K.7 FC Product Manual, Rev. C Iii Cheetah 15K.7 FC Product Manual, Rev. C Seagate Technology support services Seagate Online Support and Services Scope Electromagnetic compatibility Applicable standards and reference documentationStandards Electromagnetic susceptibility European Union Restriction of Hazardous Substances RoHS Reference documents Ncits TR-20 General description Standard features Reliability Media descriptionPerformance Formatted capacities Programmable drive capacity Factory-installed optionsUser-installed accessories Seek performance characteristics Performance characteristicsInternal drive characteristics Access time Start/stop time Format command execution time minutesGeneral performance characteristics ST3600057FC ST3450857FC ST3300657FC Prefetch/multi-segmented cache control Cache operation Caching write data Prefetch operation Recoverable Errors Reliability specificationsError rates Unrecoverable Errors Interface errors Reliability and serviceSeek errors Preventive maintenance Performance impact 4 S.M.A.R.TControlling S.M.A.R.T Milliseconds Predictive failures Temperature Log Page 0DhDetermining rate Thermal monitor DST failure definition State of the drive prior to testingDrive Self Test DST Implementation Extended test Function Code 010b Short and extended testsShort test Function Code 001b Log page entries Product repair and return information Product warrantyShipping DC power requirements Physical/electrical specificationsAC power requirements ST3600057FC DC power requirements Gbit Amps ST3450857FC DC power requirements Gbit Amps General DC power requirement notes ST3300657FC DC power requirements Gbit Amps Current profiles Power sequencingConducted noise immunity Typical ST3450857FC current profiles Typical ST3300657FC current profiles Power dissipation 600GB model 450GB models 300GB models Temperature a. OperatingEnvironmental limits Relative humidity Effective altitude sea level a. Operating Shock Package size Packaged/product weight Drop heightShock and vibration Recommended mounting Acoustics Air cleanlinessVibration a. Operating-normal Electromagnetic susceptibility See Section Corrosive environmentRoHS compliance statement Mechanical specifications Mounting configuration dimensions Level 2 security About FipsPurpose About self-encrypting drives Controlled accessAdmin SP Data encryption Drive locking Default passwordRandom number generator RNG Data bands Supported commands Authenticated firmware downloadPower requirements Cryptographic erase Drive error recovery procedures Defect and error managementDrive internal defects/errors Page FC-AL system errors These values are subject to change Deferred Auto-Reallocation Background Media ScanMedia Pre-Scan Idle Read After Write Drive orientation InstallationDrive ID/option selection Cooling Air flow Drive mounting Grounding Link services supported Type of frame FC-AL featuresFibre Channel link service frames Interface requirements FC Scsi FCP response codes Function name Response code Fibre Channel task management functionsFibre Channel task management responses Fibre Channel port login NPort login Plogi payload Bytes Process Login Plri payload Fibre Channel port login acceptNPort Login Accept ACC payload Bytes Process Login Accept ACC payload Bytes Fibre Channel Process Login AcceptFibre Channel fabric login Fabric Login Flogi payload Bytes Fibre Channel fabric accept login Fabric Login Accept ACC payload Bytes Fibre Channel Arbitrated Loop options Scsi commands supportedDual port support FC-AL options supported Supported commands Cheetah 15K.7 FC Product Manual, Rev. C Cheetah 15K.7 FC Product Manual, Rev. C Background Medium Scan 15h Cheetah 15K.7 FC inquiry data Bytes Data hex Mode Sense dataInquiry data Page Mode Data Header Block Descriptor Ec b2 5c 00 00 02 Supported Feature or condition Miscellaneous operating features and conditionsMiscellaneous features Miscellaneous status Physical description Physical characteristicsFC-AL physical interface Pin descriptions Connector requirementsElectrical description FC-AL transmitters and receivers FC-SCA pin descriptions Pin Signal name Signal typePin Signal name Signal type Power Fault LED Out Motor start controls Enable port bypass signalsActive LED Out Parallel Enclosure Services Interface ESI 12.5.11 SEL6 through SEL0 ID lines Hex Dec SettingArbitrated loop physical address Alpa values Device control codes Signal characteristicsTTL input characteristics provides the TTL characteristics FC Differential input LED driver signalsFC Differential output Receive eye diagram Eye diagram data values Link rate GHz Index Numerics Devctrlcode FCP Mtbf Page See also cooling Page Cheetah 15K.7 FC Product Manual, Rev. C