Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive Product/maintenance Manual

Text of Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive User Guide:

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, 6.4 Troubleshooting Procedures C141-E133-02EN 6-15 6.4.3 Troubleshooting at the repair site For maintenance at this level, we recommend additional testing of the disk drive and signal checking. The sense data posted from the IDD helps with troubleshooting. This sense data makes the error type clear (functional, mechanical, or electrical error). Chapter 7 error analysis by sense data, and gives supplementary information on finding the error cause (faulty part). Table 6.3 lists how to detect a faulty disk drive subassembly. This fault finding requires a working ho

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Installation Requirements 4-8 C141-E133-02EN (5) Noise filter To eliminate AC line noise, a noise filter should be installed at the AC input terminal on the IDD power supply unit. The specification of this noise filter is as follows: • Attenuation: 40 dB or more at 10 MHz • Circuit construction: T-configuration as shown in Figure 4.8 is recommended. Figure 4.8 AC noise filter (recommended)

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Contents xiv C141-E133-02EN 8.3 Circuit Configuration...............................................................................8-3 8.4 Power-On Sequence.................................................................................8-5 8.5 Factory-Calibration..................................................................................8-6 8.6 Read/Write Circuit...................................................................................8-7 8.6.1 Head IC..................................................................................................8-7 8.6.2 Write circuit.......................................................................................

• 6.4 Troubleshooting Procedures C141-E133-02EN 6-13 6.4 Troubleshooting Procedures 6.4.1 Outline of troubleshooting procedures This section explains the troubleshooting procedures for disk drive errors. Depending on the maintenance level, analyze the error to detect a possibly faulty part (disk drive, or disk drive part). Full-scale troubleshooting is usually required if the error cause i

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, D.1 Fibre Channel Interface Function Specifications C141-E133-02EN D-9 Table D.1 Fibre channel interface function specifications (8 of 8) Ο : Provided × : Not provided Item Specification DIAGNOSTIC FORMAT ID [VU] (*1) (CD) × DIAGNOSTIC READ ID [VU] (*1) (CE) × WRITE RAM [VU] (*1) (D1) × READ RAM [VU] (*1) (D2) × RECOVER DATA [VU] (*1) (D8) × RECOVER ID [VU] (*1) (DA) × Defective sector slip processing function Ο Command link function × Relative block addressing function × Untagged queuing function × Tagged command queuing function Ο Contingent Allegiance (CA) × Extended Contingent Allegiance (ECA) × Asynchronous condition notification feature (AEN: async. e

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Principle of Operation 8-10 C141-E133-02EN bus16 bus16 bus16 bus16 Servo Demodulator bus8 Control Signal (PWM) Processor Data Head Head IC Read Channel DSP Drive I/F LSI MCU ARM7 HDC VCM SPM SPM/VCM Combo Notes: DSP controls actuator servo system MCU controls spindle servo system Figure 8.4 Block diagram of servo control circuit (1) Processor-ASIC (Processor-application specific IC) A DSP controls the spindle motor and the voice coil motor. The HDC sends an instruction to the DSP through the MCU via drive

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, 3.3 Defect Management C141-E133-02EN 3-15 (3) Automatic alternate block allocation • Automatic alternate block allocation at read operation If the ARRE flag in the MODE SELECT parameter permits the automatic alternate block allocation, the IDD automatically executes the alternate block allocation and data duplication on the defective data block detected during the READ or READ EXTENDED command. This allocation method is the same as with the REASSIGN BLOCKS command (alternate sector treatment). • Automatic alternate block allocation at write operation If the AWRE flag in the MODE SELECT parameter permits the automatic alternate block allocation, the IDD execu

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Principle of Operation 8-12 C141-E133-02EN 4) Gray code area The gray code is an encoded area which includes the head number, servo sector number and cylinder information as gray code. Head position is recognized based on the cylinder information embedded as a gray code pattern. 5) Position area Information for recognizing head position is recorded in the position area. Head position in cylinder unit is recognized by using the cylinder information in the gray code area, and head position under one cylinder (resolution) is recognized by using the information in the position area. IGBDS Servo zone Outer side of disk Center

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, 8.6 Read/Write Circuit C141-E133-02EN 8-7 8.6 Read/Write Circuit The write/read circuit consists of a head IC unit (in DE), write circuit, read circuit, and interface circuit. Figure 8.3 is a block diagram of the read/write circuit. 8.6.1 Head IC The head IC is mounted inside the DE. The head IC has a preamplifier and a write current driver, and has a write error detection function. Each channel is connected to each data head, and is switched by a serial port. If a write error, such as a head short-circuit or head disconnection is detected, an error signal (WUS) is generated. 8.6.2 Write circuit The write data is conv

• Principle of Operation 8-4 C141-E133-02EN Figure 8.1 Circuit configuration Data Head Head IC Read Channel Servo Demodulator RANDSPDrive I/F LSI MCU ARM7 RAM 512K × 16b Hard Disc Controller HOST Voice Coil Motor Spindle Motor SPM/VCM Driver Flash ROM 128K × 8b Buffer RAM 2Mbit × 32b (=8Mbyte)

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Preface ii C141-E133-02EN Chapter 8 Principle of Operation This chapter explains disk drives configuration and operation of MAN series. APPENDIX A to D The appendixes give supplementary information, including the locations of connector, the signal assignments of interface connectors, lists of model names and product numbers, and fibre channel interface functions. The model numbers have a suffix that describes the electrical requirements of the fibre channel interface between host system and disk drive, the data formatted at the factory and device type. CONVENTIONS USED IN THIS MANUAL This manual indicates; Decimal number: Indicates as it is. Hexadecimal number: Indicates as X’17B9’,

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Diagnostics and Maintenance 6-10 C141-E133-02EN IMPORTANT When the revision number is changed after the drive is shipped from the factory, Fujitsu issues "Engineering Change Request/Notice" in which the new revision number is indicated. When the user changes the revision number, the user should update the revision label as described in item (2) after applying the modification. Figure 6.2 Indicating revision numbers 6.2.5 Tools and test equipment Disk drive troubleshooting and repair in the field require only standard hand tools. No special tools or

• Fibre Channel Interface Functions D-8 C141-E133-02EN Table D.1 Fibre channel interface function specifications (7 of 8) Ο : Provided × : Not provided Item Specification READ DEFECT DATA (37) Ο Block address format Ο Byte-distance-from-index format Ο Physical sector address format Ο COMPARE (39) × COPY & VERIFY (3A) × WRITE BUFFER (3B) Ο Mo

• C141-E133-02EN vii MANUAL ORGANIZATION PRODUCT/ MAINTENANCE MANUAL (This manual) 1. General Description 2. Specifications 3. Data Format 4. Installation Requirements 5. Installation 6. Diagnostics and Maintenance 7. Error Analysis 8. Principle of Operation Fibre Channel Interface Specifications 1. Command Processing 2. Data Buffer Management 3. Command Specification 4. Sense Data a

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, 7.2 Sense Data Analysis C141-E133-02EN 7-3 7.2 Sense Data Analysis 7.2.1 Error information indicated with sense data Subsection 7.2.2 onwards explain troubleshooting using sense data. Table 7.1 lists the definition of sense data. For details of sense data, refer to the Fibre Channel Interface Specifications. Table 7.1 Definition of sense data Sense data Sense key Sense Code Sub Sense Code 00 00 00 Operation was normal. 3 0C 03 A write to a disk terminated abnormally. 432 40 44 C4 01 xx xx xx Failed to update the defect list due to a disk medium write error, etc. An error occurred in power-on self-diagnosis. A hard

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, 4.1 Mounting Requirements C141-E133-02EN 4-5 (3) Limitation of bottom-mounting Use all 4 mounting holes on the bottom face. (4) Environmental temperature Temperature condition at installed in a cabinet is indicated with ambient temperature measured 3 cm from the disk drive. At designing the system cabinet, consider following points. • Make a suitable air flow so that the DE surface temperature does not exceed 55°C. • Cool the PCA side especially with air circulation inside the cabinet. Confirm the cooling effect by measuring temperature of specific ICs and the DE. These measurement results should be within a criteria listed in Table

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Contents xii C141-E133-02EN 4.1.1 External dimensions ..............................................................................4-1 4.1.2 Mounting ...............................................................................................4-3 4.1.3 Notes on mounting ................................................................................4-3 4.2 Power Supply Requirements ...................................................................4-7 4.3 Connection Requirements........................................................................4-9 4.3.1 Connector ....................................................

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, 6.2 Maintenance Information C141-E133-02EN 6-11 Test results OK? Start Execute an operation test using a host computer or test equipment Yes No Yes No Start self-test by turning the power on Test results OK? Continue operation Check host system (Table 6.2) Host system normal? Analyze system-related error Replaced or repair disk drive Disk drive normal? Execute diagnostic test using a host computer or test equipment Test results OK? Test using voltage or temperature stress Test results OK? Normal Analyze disk drive error (Table 6.3) Yes Yes No N

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Preface iv C141-E133-02EN (Example) Data loss For MAN series, Reed Solomon codes are applied for their ECC. The sector-data is divided into 6 interleaving sectors, and ECC is performed in each sector where the maximum number of errors (up to 5 byte) can be corrected. [Total maximum byte: 5 byte × 6 ( interleave) = 30 byte] If the error of read sector keeps allowable error byte number, correction is performed. However, if error byte exceeds its allowable number, correction may not be performed properly. The main alert messages in the text are also listed in the “Important Alert Items.” Attention Please forward any comments you may have regarding this man

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Data Format 3-8 C141-E133-02EN SCT PAD SM1 PLO SyncG1 SCT G1 6 bytes G2 12 bytes G3 8 bytes PLO Sync 36 bytes SM1 4 bytes SM2 2 bytes BCRC 4 bytes ECC 60 bytes PAD 6 bytes DATA1 24 bytes DATA2 488 bytes DATA3 n bytes (0 ≤ n ≤ 464, n is a multiple of 4.) DATA4 (464 – n) bytes G2 DATA1 SM2 BCRCDATA2 ECC SCT PAD SM1 PLO Sync G1 SCT G3 DATA1 SM2 DATA3 PAD G2 SM1 PLO SyncG1 DATA1 SM2 DATA4 Servo BCRC ECC Figure 3.6 Sector format Each sector on the track consists of the following fields: (1) Gaps (G1, G2, G3) The gap length at the time of format

• Fujitsu MAN3367FC - Enterprise 36.7 GB Hard Drive, Index IN-4 C141-E133-02EN T take following action if problem occurs 5-6 test 6-10 flowchart 6-11 program 6-4 tool and test equipment 6-10 track following operation 8-13 track format 3-5 track skew and cylinder skew 3-6 track skew/cylinder skew 3-7 training area 8-11 troubleshooting at repair site 6-15 procedure 6-13 with disk drive replacement in field 6-13 with parts replacement in factory 6-16 U unpackaging 5-2 unrecoverable error rate 2-5 user space 3-3 V VCM driver 8-10 verify error

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