Fujitsu MAW3300FC, MAW3147FC, MAW3073fc Defect Management Defect list, Alternate block allocation

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Data Format

3.3Defect Management

3.3.1Defect list

Information of the defect location on the disk is managed by the defect list. The following are defect lists which the HDD manages.

•P list (Primary defect list): This list consists of defect location information available at the disk drive shipment and is recorded in a system space. The defects in this list are permanent, so the initiator must execute the alternate block allocation using this list when initializing the disk.

•D list (Data defect list): This list consists of defect location information specified in a FORMAT UNIT command by the initiator at the initialization of the disk. This information is recorded in the system space of the disk drive as the G list. To execute the alternate block allocation, the FORMAT UNIT command must be specified.

•G list (Growth defect list): This list consists of defective logical data block location information specified in a REASSIGN BLOCKS command by the initiator, information on defective logical data blocks assigned alternate blocks by means of the HDD automatic alternate block allocation, information specified as the D list, and information generated as the C list. They are recorded in the system space on the disk drive.

The initiator can read out the contents of the P and G lists by the READ DEFECT DATA command.

3.3.2Alternate block allocation

The alternate data block is allocated to a defective data block (= sectors) in defective sector units by means of the defect management method inside the HDD.

The initiator can access all logical data blocks in the user space, as long as there is no error.

Spare sectors to which alternate blocks are allocated can be provided in "alternate cylinders". See Subsection 3.1.2 for details.

The initiator can specify the size and area for spare sectors by the MODE SELECT command at the time of the initialization of the disk.

Both of the following are applicable to the alternate block allocation.

•Sector slip treatment: Defective sectors are skipped and the logical data block corresponding to those sectors is allocated to the next physical sectors. This treatment is made on the same cell as the defective sector's and is effective until all spare sectors in that cell are used up.

•Alternate sector treatment: The logical data block corresponding to defective sectors is allocated to unused spare sectors in the alternate cylinder.

The alternate block allocation is executed by the FORMAT UNIT command, the REASSIGN BLOCKS command, or the automatic alternate block allocation. Refer to Chapter 4 “Command Specifications” and Subsection 5.3.2 “Auto alternate block allocation processing” of the Fibre Channel Interface Specifications for details of specifications on these commands. The logical data block is allocated to the next physically continued sectors after the above sector slip treatment is made. On the other hand, the logical data block is allocated to spare sectors which are not physically consecutive to the adjacent logical data blocks. If a command which processes several logical data blocks is specified, the HDD processes those blocks in ascending order of logical data block.

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C141-E235

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Contents C141-E235-01EN For Safe Operation C141-E235 This page is intentionally left blank Revision Record Fibre Channel Physical and Signaling Interface FC-PH Fibre Channel Physical and Signaling INTERFACE-2 FC-PH-2Fibre Channel Arbitrated Loop FC-AL Fibre Channel Protocol for Scsi SCSI-FCPPreface Overview of ManualPreface Conventions for Alert MessagesC141-E235 Iii This page is intentionally left blank Important Alert Items Important Alert MessagesImportant Alert Items C141-E235 Vii This page is intentionally left blank Maintenance Manual SpecificationsManual Organization Product Fibre ChannelThis page is intentionally left blank Contents Installation ContentsAppendix a Figures Tables This page is intentionally left blank Standard Features Hardware Structure System Configuration General DescriptionStandard Features General DescriptionStandard Features General Description Hardware Structure FC model drives outer viewGeneral Description System Configuration Example of FC-AL system configurationThis page is intentionally left blank Hardware Specifications Hardware Specifications Model name and order numberModel names and order numbers Specifications Function specificationsHardware Specifications Environmental specifications Environmental/power requirementsError rate ReliabilityMtbf = Hardware Specifications This page is intentionally left blank Cylinder configuration Data Space Logical Data Block Addressing Defect ManagementData Space Data Format SA0Data Space Alternate spare area Spare area in cellTrack format Track skew/head skew Sector formatData Space Format capacity Logical Data Block Addressing Defect Management Defect list Alternate block allocationAlternate block allocation by Format Unit command Defect ManagementAlternate block allocation by Reassign Blocks command Write Write Extend Write Write Extended Format Unit Installation Requirements Mounting Requirements External dimensionsInstallation Requirements DimensionsMounting Requirements Mounting orientationsMounting frame structure Limitation of side-mounting Surface temperature check point HDCMPU Service clearance area MAW3300FC MAW3147FC MAW3073FC Connector location Connection RequirementsInterface connector 10 SCA2 type connectorInstallation Installation Setting Setting Loop ID settingMode settings Motor start modeMounting Drives Mounting procedures C141-E235 Checking connection Checking the HDD connection a Checking the HDD connection B Formatting Installation Setting parameters Awre ArreArre Awre PER Disc XffffXxxx Commands is Dismounting Drives Diagnostics Self-diagnostics Self-diagnostic functionsDiagnostics and Maintenance Diagnostics Test programs Maintenance Information Maintenance Information PrecautionsMaintenance requirements Maintenance levels Revision numbers Revision label exampleIndicating revision numbers Tools and test equipment TestsTest flowchart Diagnostic test Operation CheckOperation Check Initial seek operation check Operation testTroubleshooting with disk drive replacement in the field Troubleshooting Procedures System-level field troubleshootingTroubleshooting at the repair site Disk drive troubleshootingTroubleshooting Procedures Troubleshooting with parts replacement in the factoryFinding possibly faulty parts This page is intentionally left blank Error Analysis Information Collection Sense Data Analysis Error Analysis Information Collection Sense dataError Analysis ILILSB SksvSense Data Analysis Definition of sense dataSense data 1-1x-xx, 3-1x-xx and E-1D-00 Disk read error Sense data 3-0C-03, 4-40-xx, and 4-C4-xxAppendix a Connector Signal Allocation Interface FC-SCA Connector Signal AllocationConnector Signal Allocation Glossary Glossary Target TargAcronyms and Abbreviations Acronyms and Abbreviations OEMBcrc ECCMode SELECT/MODE Select IndexMtbf Mttr PADC141-E235 IN-3 This page is intentionally left blank Comment Form This page is intentionally left blank
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MAW3073fc, MAW3147FC, MAW3300FC specifications

The Fujitsu MAW3073fc, MAW3300FC, and MAW3147FC are high-performance Fibre Channel hard disk drives that cater to enterprise storage solutions. Designed for demanding applications, these drives are engineered to deliver reliability, speed, and capacity, making them suitable for data centers and other high-availability environments.

The MAW3073fc offers a storage capacity of 73GB and operates at 15,000 RPM, ensuring rapid data access and high throughput. This drive features advanced error correction capabilities, enhancing data integrity while minimizing downtime. The MAW3073fc supports the Fibre Channel interface, enabling fast data transfer rates that are essential for high-performance computing scenarios.

Following this, the MAW3300FC steps up the game with a larger capacity of 300GB, also spinning at 15,000 RPM. It boasts enhanced reliability features, including improved thermal management and vibration tolerance, which significantly reduce wear and tear and prolong the drives' lifespan. Its hot-swappable design allows for easy maintenance, making it an ideal choice for critical applications that require minimal disruptions.

The MAW3147FC further expands the offering with a storage capacity of 147GB. Designed for applications that require a balance between performance and capacity, this drive provides a reliable solution for enterprise environments. Like its counterparts, it operates at 15,000 RPM, ensuring swift data retrieval and consistency under heavy loads. The MAW3147FC also implements sophisticated caching algorithms that optimize read and write performance.

All three drives utilize SCSI command sets and feature RAID support, making them compatible with various enterprise storage systems. These drives are built with enterprise-grade components, ensuring durability and reliability, crucial in mission-critical setups. The combination of high RPM speeds, reliability features, and large capacities makes the Fujitsu MAW series an excellent choice for organizations looking to enhance their storage infrastructure.

In terms of technologies, these drives use advanced servo technology and tight mechanical tolerances to achieve high precision and performance. Moreover, they are designed to operate in environments with rigorous temperature and humidity controls, further enhancing their reliability. The MAW series exemplifies Fujitsu's commitment to providing high-quality, performance-driven storage solutions for modern enterprise needs.
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