Seagate ST800FM0012, ST100FM0012, ST100FM0052, ST100FM0002, ST200FM0012, ST200FM0002 Mode Sense data

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11.3.2MODE SENSE data

The MODE SENSE command provides a way for the drive to report its operating parameters to the initiator. The drive maintains four sets of mode parameters:

1.Default values

Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the drive’s PCB. These default values can be changed only by downloading a complete set of new firmware into the flash E-PROM. An initiator can request and receive from the drive a list of default values and use those in a MODE SELECT command to set up new current and saved values, where the values are changeable.

2.Saved values

Saved values are stored on the drive’s media using a MODE SELECT command. Only parameter values that are allowed to be changed can be changed by this method. Parameters in the saved values list that are not changeable by the MODE SELECT com- mand get their values from default values storage.

When power is applied to the drive, it takes saved values from the media and stores them as current values in volatile memory. It is not possible to change the current values (or the saved values) with a MODE SELECT command before the drive is “ready.” An attempt to do so results in a “Check Condition” status.

On drives requiring unique saved values, the required unique saved values are stored into the saved values storage location on the media prior to shipping the drive. Some drives may have unique firmware with unique default values also.

On standard OEM drives, the saved values are taken from the default values list and stored into the saved values storage location on the media prior to shipping.

3.Current values

Current values are volatile values being used by the drive to control its operation. A MODE SELECT command can be used to change the values identified as changeable values. Originally, current values are installed from saved or default values after a power on reset, hard reset, or Bus Device Reset message.

4.Changeable values

Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values and saved values can be changed by a MODE SELECT command. A one (1) indicates the value can be changed. A zero (0) indicates the value is not change- able. For example, in Table 19, refer to Mode page 81, in the row entitled “CHG.” These are hex numbers representing the changeable values for Mode page 81. Note in columns 5 and 6 (bytes 04 and 05), there is 00h which indicates that in bytes 04 and 05 none of the bits are changeable. Note also that bytes 06, 07, 09, 10, and 11 are not changeable, because those fields are all zeros. In byte 02, hex value FF equates to the binary pattern 11111111. If there is a zero in any bit position in the field, it means that bit is not changeable. Since all of the bits in byte 02 are ones, all of these bits are changeable.

The changeable values list can only be changed by downloading new firmware.

Note. Because there are often several different versions of drive control firmware in the total population of drives in the field, the MODE SENSE values given in the following tables may not exactly match those of some drives.

The following tables list the values of the data bytes returned by the drive in response to the MODE SENSE command pages for SCSI implementation (see the SAS Interface Manual).

DEF = Default value. Standard OEM drives are shipped configured this way.

CHG = Changeable bits; indicates if default value is changeable.

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
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