Fujitsu MAV2036RC, MAV2073RC manual Setting parameters

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5.4Checking Operation after Installation and Preparing the HDD for Use

5.4.3Setting parameters

The user can specify the optimal operation mode for the user system environments by setting the following parameters with the MODE SELECT or MODE SELECT EXTENDED command:

•Error recovery parameter

•Caching parameter

•Control mode parameter

With the MODE SELECT or MODE SELECT EXTENDED command, specify 1 for the "SP" bit on CDB to save the specified parameter value on the disk. This enables the HDD to operate by using the parameter value set by the user when power is turned on again.

When the parameters are not set or saved with the MODE SELECT or MODE SELECT EXTENDED command, the HDD sets the default values for parameters and operates when power is turned on or after reset. Although the HDD operations are assured with the default values, the operations are not always optimal for the system. To obtain the best performance, set the parameters in consideration of the system requirements specific to the user.

This section outlines the parameter setting procedures. Refer to Subsection 4.1.4 “MODE SELECT (15)”, 4.1.5 “MODE SELECT EXTENDED (55)” of the SAS Specifications for further details of the MODE SELECT and MODE SELECT EXTENDED commands and specifying the parameters.

1.At factory shipment of the HDD, the saving operation for the MODE SELECT parameter is not executed. So, if the user does not set parameters, the HDD operates according to the default value of each parameter

2.The model select parameter is not saved for each Loop ID of but as the common parameter for all INIT. In the multi-INIT System, parameter setting cannot be changed for each INIT.

3.Once parameters are saved, the saved value is effective as long as next saving operation is executed from the INIT. For example, even if the initialization of the disk is performed by the FORMAT UNIT command, the saved value of parameters described in this section is not affected.

4.When the HDD, to which the saving operation has been executed on a system, is connected to another system, the user must pay attention to that the HDD operates according to the saved parameter value if the saving operation is not executed at installation.

5.The saved value of the MODE SELECT parameter is assumed as the initial value of each parameter after the power-on, the RESET condition.. The INIT can change the parameter value temporary (actively) at any timing by issuing the MODE SELECT or MODE SELECT EXTENDED command with specifying "0" to the SP bit in the CDB.

C141-E219

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Contents C141-E219-01EN For Safe Operation Revision Record Related Standards Overview of Manual PrefaceConventions for Alert Messages PrefaceImportant Alert Messages Important Alert ItemsData loss Important Alert ItemsInterface Maintenance ManualSpecifications Manual Organization ProductThis page is intentionally left blank Contents Contents InstallationSense data 4-44-xx, 5-2x-xx, B-44-xx, B-47-xx, B-4B-xx Troubleshooting with disk drive replacement in the fieldTroubleshooting with parts replacement in the factory Figures Tables This page is intentionally left blank General Description Standard Features Hardware Structure System ConfigurationGeneral Description Standard FeaturesStandard Features General Description Hardware Structure System Configuration Model names and order numbers Hardware SpecificationsHardware Specifications Model name and order number 32/34 Meeprml SpecificationsFunction specifications MAV2073RC MAV2036RCHardware Specifications Environmental/Power requirements Environmental specificationsMTBF= Error rateReliability Specifications Data Space Cylinder configurationData Space Logical Data Block Addressing Defect Management Data Format Data Space Spare area in cell Alternate spare areaTrack format Sector format Track skew/head skewData Space Format capacity Logical Data Block Addressing Alternate block allocation Defect Management Defect listDefect Management Alternate block allocation by Format Unit commandAlternate block allocation by Reassign Blocks command Write Write Extend Write Write Extended Format Unit Mounting Requirements Dimensions Installation RequirementsMounting orientations Installation RequirementsMounting Requirements Mounting frame structure MPU Surface temperature check point and maximum temperatureConnection Requirements HDCService clearance area Current waveform +12V DC Power Supply RequirementsConnector location 10 SAS plug connector overview Interface connectorInterface connector SAS plug signal allocationCN1 Installation Installation Mounting Drives Mounting procedures SettingSetting Port Address Installation Formatting Installation Setting parameters Arre Awre PER AwreArre Xxxx DiscXffff Dismounting Drives Self-diagnostic functions Diagnostics Self-diagnosticsDiagnostics and Maintenance Diagnostics Test programs Precautions Maintenance InformationMaintenance requirements Revision numbers Maintenance levelsIndicating revision numbers Tools and test equipment Tests Test flowchartOperation test Diagnostic testOperation Check Initial seek operation check Troubleshooting with disk drive replacement in the field Troubleshooting ProceduresSystem-level field troubleshooting Disk drive troubleshooting Troubleshooting at the repair siteFinding possibly faulty parts Troubleshooting with parts replacement in the factoryError Analysis Information Collection Sense data Error Analysis Information Collection Sense Data AnalysisSksv Error AnalysisILI LSBDefinition of sense data Sense Data AnalysisSense data 3-0C-03, 4-40-xx, and 4-C4-xx Sense data 1-1x-xx, 3-1x-xx and E-1D-00 Disk read errorGlossary Target Targ GlossaryAcronyms and Abbreviations SAS Acronyms and AbbreviationsECC BcrcPAD Mode SELECT/MODE SelectIndex Mtbf MttrC141-E219 IN-3 This page is intentionally left blank Comment Form This page is intentionally left blank
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