Maxtor 51536U3 manual

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Table of contents for the manual

  • Page 1

    DiamondMax ® Plus 40 54098U8, 53073U6, 52049U4, 51536U3, 51024U2 All material contained herein Copyright © 2000 Maxtor Corporation. MaxFax™ is a trademark of Maxtor Corporation. DiamondMax ® , Maxtor ® and No Quibble ® Service are registered trademarks of Maxtor Corporation. Other brands or products are trademarks or registered trademarks of[...]

  • Page 2

    Before Y Before Y Before Y Before Y Before Y ou Begin ou Begin ou Begin ou Begin ou Begin Thank you for your interest in the Maxtor DiamondMax ® Plus 40 AT hard disk drives. This manual provides technical information for OEM engineers and systems integrators regarding the installation and use of DiamondMax hard drives. Drive repair should be perfo[...]

  • Page 3

    DIAMONDMAX PLUS 40 PRODUCT MANUAL i Contents Contents Contents Contents Contents Section 1 Section 1 Section 1 Section 1 Section 1 — Introduction Introduction Introduction Introduction Introduction Maxtor Corporation 1 - 1 Products 1 - 1 Support 1 - 1 Manual Organization 1 - 1 Abbreviations 1 - 1 Conventions 1 - 2 Key Words 1 - 2 Numbering 1 - 2 [...]

  • Page 4

    DIAMONDMAX PLUS 40 PRODUCT MANUAL ii Section 3 Section 3 Section 3 Section 3 Section 3 — Product Specifications Product Specifications Product Specifications Product Specifications Product Specifications Models and Capacities 3 - 1 Drive Configuration 3 - 1 Performance Specifications 3 - 1 Physical Dimensions 3 - 2 Power Requirements 3 - 3 Power [...]

  • Page 5

    DIAMONDMAX PLUS 40 PRODUCT MANUAL iii Section 5 Section 5 Section 5 Section 5 Section 5 — AT Interface Description AT Interface Description AT Interface Description AT Interface Description AT Interface Description Interface Connector 5 - 1 Pin Description Summary 5 - 1 Pin Description Table 5 - 2 PIO Timing 5 - 3 DMA Timing 5 - 4 Ultra DMA Timin[...]

  • Page 6

    DIAMONDMAX PLUS 40 PRODUCT MANUAL iv Write Verify Sector(s) 7 - 4 Write Sector Buffer 7 - 4 Write DMA 7 - 5 Write Multiple 7 - 5 Ultra DMA 7 - 5 Set Feature Commands 7 - 5 Set Features Mode 7 - 5 Power Mode Commands 7 - 7 Standby Immediate 7 - 7 Idle Immediate 7 - 7 Standby 7 - 7 Idle 7 - 7 Check Power Mode 7 - 7 Set Sleep Mode 7 - 7 Default Power-[...]

  • Page 7

    DIAMONDMAX PLUS 40 PRODUCT MANUAL v Figures Figures Figures Figures Figures Figure T itle Page 2 - 1 PCBA Jumper Location and Configuration 2 - 6 3 - 1 Outline and Mounting Dimensions 3 - 2 4 - 1 Multi-pack Shipping Container 4 - 2 4 - 2 Single-pack Shipping Container (Option A) 4 - 3 4 - 3 Single-pack Shipping Container (Option B) 4 - 3 4 - 4 Mast[...]

  • Page 8

    DIAMONDMAX PLUS 40 – INTRODUCTION 1 – 1 SECTION 1 Introduction Introduction Introduction Introduction Introduction Maxtor Corporation Maxtor Corporation Maxtor Corporation Maxtor Corporation Maxtor Corporation Maxtor Corporation has been providing high-quality computer storage products since 1982. Along the way, we’ve seen many changes in dat[...]

  • Page 9

    DIAMONDMAX PLUS 40 – INTRODUCTION 1 – 2 Conventions Conventions Conventions Conventions Conventions If there is a conflict between text and tables, the table shall be accepted as being correct. Key Words Key Words Key Words Key Words Key Words The names of abbreviations, commands, fields and acronyms used as signal names are in all uppercase ty[...]

  • Page 10

    PRODUCT DESCRIPTION 2 – 1 SECTION 2 Product Product Product Product Product Description Description Description Description Description Maxtor DiamondMax ® Plus 40 AT disk drives are 1-inch high, 3.5-inch diameter random access storage devices which incorporate an on-board ATA-5/Ultra DMA 66 controller. High capacity is achieved by a balanced co[...]

  • Page 11

    PRODUCT DESCRIPTION 2 – 2 Product Product Product Product Product Features Features Features Features Features Functional / Interface Functional / Interface Functional / Interface Functional / Interface Functional / Interface Maxtor DiamondMax Plus 40 hard drives contain all necessary mechanical and electronic parts to interpret control signals a[...]

  • Page 12

    PRODUCT DESCRIPTION 2 – 3 The LBA is checked for violating the drive capacity. If it does not, the LBA is converted to physical drive cylinder, head and sector values. The physical address is then used to access or store the data on the disk and for other drive related operations. Defect Management Zone (DMZ) Defect Management Zone (DMZ) Defect M[...]

  • Page 13

    PRODUCT DESCRIPTION 2 – 4 Major HDA Components Major HDA Components Major HDA Components Major HDA Components Major HDA Components Drive Mechanism Drive Mechanism Drive Mechanism Drive Mechanism Drive Mechanism A brush-less DC direct drive motor rotates the spindle at 7,200 RPM (±0.1%). The dynamically balanced motor/spindle assembly ensures min[...]

  • Page 14

    PRODUCT DESCRIPTION 2 – 5 N O I T A R U G I F N O C R E P M U J0 5 J8 4 J6 4 J4 4 J2 4 J e v a l S / r e t s a M * m e t s y s e v i r d e l g n i s n i e v i r d y l n O * m e t s y s e v i r d l a u d n i e v i r d r e t s a M m e t s y s e v i r d l a u d n i e v i r d e v a l S C C O t c e l e S e l b a C * d e l b a s i D d e l b a n E O C n[...]

  • Page 15

    PRODUCT SPECIFICATIONS 3 – 1 SECTION 3 Product Specifications Product Specifications Product Specifications Product Specifications Product Specifications Models and Capacities Models and Capacities Models and Capacities Models and Capacities Models and Capacities Performance Specifications Performance Specifications Performance Specifications Per[...]

  • Page 16

    PRODUCT SPECIFICATIONS 3 – 2 Physical Dimensions Physical Dimensions Physical Dimensions Physical Dimensions Physical Dimensions (maximum) 1 .028 max [26.1 mm ma x .25 ± .0 1 [6.35 ± 0.25 m m 1 .1 22 ± .020 [28.5 ± 0.5 mm] 1 .638 ± .0 1 0 [41 .6 ± 0.25 mm] 1 .625 ± .02 [41 .28 ± 0.5 mm] 4.00 ± .0 1 [1 0 1 .6 ± 0.5 mm] 1 .75 ± .0 1 [44.[...]

  • Page 17

    PRODUCT SPECIFICATIONS 3 – 3 Power Requirements Power Requirements Power Requirements Power Requirements Power Requirements Power Mode Definitions Power Mode Definitions Power Mode Definitions Power Mode Definitions Power Mode Definitions Spin-up Spin-up Spin-up Spin-up Spin-up The drive is spinning up following initial application of power and h[...]

  • Page 18

    PRODUCT SPECIFICATIONS 3 – 4 Reliability Specifications Reliability Specifications Reliability Specifications Reliability Specifications Reliability Specifications Annual Return Rate Annual Return Rate Annual Return Rate Annual Return Rate Annual Return Rate < 1.0% Annual Return Rate (ARR) indicates the average against products shipped. ARR in[...]

  • Page 19

    PRODUCT SPECIFICATIONS 3 – 5 EMC/EMI EMC/EMI EMC/EMI EMC/EMI EMC/EMI Radiated Electromagnetic Field Emissions - EMC Compliance Radiated Electromagnetic Field Emissions - EMC Compliance Radiated Electromagnetic Field Emissions - EMC Compliance Radiated Electromagnetic Field Emissions - EMC Compliance Radiated Electromagnetic Field Emissions - EMC [...]

  • Page 20

    INSTALLATION 4 – 1 SECTION 4 Handling and Installation Handling and Installation Handling and Installation Handling and Installation Handling and Installation Hard Drive Handling Precautions Hard Drive Handling Precautions Hard Drive Handling Precautions Hard Drive Handling Precautions Hard Drive Handling Precautions ◆ If the handling precautio[...]

  • Page 21

    INSTALLATION 4 – 2 Unpacking and Inspection Unpacking and Inspection Unpacking and Inspection Unpacking and Inspection Unpacking and Inspection Retain any packing material for reuse. Inspect the shipping container for evidence of damage in transit. Notify the carrier immediately in case of damage to the shipping container. As they are removed, in[...]

  • Page 22

    INSTALLATION 4 – 3 Figure 4 - 2 Single Pack Shipping Container (Option A) Figure 4 - 3 Single Pack Shipping Container (Option B) Repacking Repacking Repacking Repacking Repacking If a Maxtor drive requires return, repack it using Maxtor packing materials, including the antistatic bag. Physical Installation Physical Installation Physical Installat[...]

  • Page 23

    INSTALLATION 4 – 4 Before You Begin Before You Begin Before You Begin Before You Begin Before You Begin Important – Please Read Important – Please Read Important – Please Read Important – Please Read Important – Please Read Please read this installation section completely before installing the Maxtor hard drive. It gives general informa[...]

  • Page 24

    INSTALLATION 4 – 5 Install the Hard Drive in a Device Bay Install the Hard Drive in a Device Bay Install the Hard Drive in a Device Bay Install the Hard Drive in a Device Bay Install the Hard Drive in a Device Bay Refer to your computer user’s manual for specific mounting information. Be sure to secure the drive to the device bay with all four [...]

  • Page 25

    AT INTERFACE DESCRIPTION 5 – 1 SECTION 5 A A A A A T Interface Description T Interface Description T Interface Description T Interface Description T Interface Description Interface Connector Interface Connector Interface Connector Interface Connector Interface Connector All DiamondMax ® Plus 40 AT drives have a 40-pin ATA interface connector mou[...]

  • Page 26

    AT INTERFACE DESCRIPTION 5 – 2 Pin Description Table Pin Description Table Pin Description Table Pin Description Table Pin Description Table E M A N N I PN I PO / IE M A N L A N G I SN O I T P I R C S E D L A N G I S - T E S E R1 0I t e s e R t s o H . r e t f a e v i t c a n i d n a p u r e w o p g n i r u d e v i t c A . m e t s y s t s o h e h[...]

  • Page 27

    AT INTERFACE DESCRIPTION 5 – 3 S R E T E M A R A P G N I M I T0 E D O M1 E D O M2 E D O M3 E D O M4 E D O M 0 t) n i m ( e m i T e l c y Cs n 0 0 6s n 3 8 3s n 0 4 2s n 0 8 1s n 0 2 1 1 t) n i m ( p u t e s - W O I D / - R O I D o t d i l a v s s e r d d As n 0 7s n 0 5s n 0 3s n 0 3s n 5 2 2 t) n i m ( t i b - 6 1 - W O I D / - R O I Ds n 5 6 1s[...]

  • Page 28

    AT INTERFACE DESCRIPTION 5 – 4 DMA Timing DMA Timing DMA Timing DMA Timing DMA Timing S R E T E M A R A P G N I M I T0 E D O M1 E D O M2 E D O M 0 t) n i m ( e m i T e l c y Cs n 0 8 4s n 0 5 1s n 0 2 1 C ty a l e d Q R A M D o t K C A M D D t) n i m ( - W O I D / - R O I Ds n 5 1 2s n 0 8s n 0 7 E t) n i m ( s s e c c a a t a d - R O I Ds n 0 5 [...]

  • Page 29

    AT INTERFACE DESCRIPTION 5 – 5 Ultra DMA Timing Ultra DMA Timing Ultra DMA Timing Ultra DMA Timing Ultra DMA Timing S R E T E M A R A P G N I M I T ) s d n o c e s o n a n n i s e m i t l l a ( 0 E D O M1 E D O M2 E D O M3 E D O M4 E D O M N I MX A MN I MX A MN I MX A MN I MX A MN I MX A M t C Y C e m i T e l c y C) e g d e E B O R T S o t e g d [...]

  • Page 30

    AT INTERFACE DESCRIPTION 5 – 6 Figure 5 - 5 Sustained Ultra DMA Data In Burst t DVH DSTROBE at d evi ce DD(15:0) at d evi ce DSTROBE at host DD(15:0) at host t DVH t CYC t CYC t DVS t DVS t DH t DS t DH t DS t 2CYC t DH t DVH t 2CYC DMARQ (device) DMACK- (host) STOP (host) HDMARDY- (host) DSTROBE (device) DD(15:0) (device) t SR t RFS t RP Figure [...]

  • Page 31

    AT INTERFACE DESCRIPTION 5 – 7 t AZ t IORDYZ CRC DMARQ ( device ) DMACK- (host) STOP (host) HDMARDY- (host) DSTROBE ( device ) DD(15:0) DA0, DA1 , DA2, CS0-, CS1- t ACK t LI t MLI t DVS t LI t ACK t ACK t ZAH t DVH t SS t LI Figure 5 - 7 Device Terminating an Ultra DMA Data In Burst t DVH CRC t AZ DMARQ (device) DMACK- (host) STOP ( host ) HDMARD[...]

  • Page 32

    AT INTERFACE DESCRIPTION 5 – 8 t DH t DS t DVH HSTROBE at host DD(15:0) at host HSTROBE at d evi ce DD(15:0) at d evi ce t DVH t CYC t CYC t DVS t DVS t DS t DH t 2CYC t DH t DVH t 2CYC DMARQ (device) DMACK- ( host ) STOP (host) DDMARDY- (device) HSTROBE (host) DD(15:0) (host) DA0, DA1 , DA2, CS0-, CS1- t UI t ACK t ENV t ZIORDY t LI t DVS t DVH [...]

  • Page 33

    AT INTERFACE DESCRIPTION 5 – 9 DMARQ (device) DMACK- (host) STOP (host) DDMARDY- (device) HSTROBE (host) DD(15:0) (host) t SR t RFS t RP Figure 5 - 11 Device Pausing an Ultra DMA Data Out Burst DMARQ (device) DMACK- (host) STOP (host) DDMARDY- (device) HSTROBE (host) DD(15:0) (host) DA0, DA1 , DA2, CS0-, CS1- t ACK t LI t MLI t DVS t LI t LI t AC[...]

  • Page 34

    AT INTERFACE DESCRIPTION 5 – 10 DMARQ (device) DMACK- (host) STOP ( host ) DDMARDY- ( device ) HSTROBE (host) DD(15:0) (host) DA0, DA1 , DA2, CS0- , CS1- t ACK t MLI t DVS t LI t LI t ACK CRC t DVH t ACK t IORDYZ t MLI t RP t RFS Figure 5 - 13 Device Terminating an Ultra DMA Data Out Burst[...]

  • Page 35

    HOST SOFTWARE INTERFACE 6 – 1 SECTION 6 Host Software Interface Host Software Interface Host Software Interface Host Software Interface Host Software Interface The host communicates with the drive through a set of controller registers accessed via the host’s I/O ports. These registers divide into two groups: the Task File, used for passing comm[...]

  • Page 36

    HOST SOFTWARE INTERFACE 6 – 2 Sector Count Register Sector Count Register Sector Count Register Sector Count Register Sector Count Register Holds the number of sectors to be sent during a Read or Write command, and the number of sectors per track during a Format command. A value of zero in this register implies a transfer of 256 sectors. A multi-[...]

  • Page 37

    HOST SOFTWARE INTERFACE 6 – 3 Command Register Command Register Command Register Command Register Command Register Contains code for the command to be performed. Additional command information should be written to the task file before the Command register is loaded. When this register is written, the BUSY bit in the Status register sets, and inte[...]

  • Page 38

    HOST SOFTWARE INTERFACE 6 – 4 D E S U S R E T E M A R A P E D O C D N A M M O C E M A N D N A M M O C 7 b6 b5 b4 b3 b2 b1 b0 bF C SN SC H D S e t a r b i l a c e R 0 00 1 xxxx NNNN D ) s ( r o t c e S d a e R 0 0 1 000Lx N Y Y Y Y A M D d a e R 1 1 0 0 1 00 x N YYY Y ) s ( r o t c e S e t i r W 0 0 1 100 Lx N YYY Y A M D e t i r W 1 1 0 01 01 x N[...]

  • Page 39

    HOST SOFTWARE INTERFACE 6 – 5 Control Diagnostic Registers Control Diagnostic Registers Control Diagnostic Registers Control Diagnostic Registers Control Diagnostic Registers These I/O port addresses reference three Control/Diagnostic registers: T R O P O / ID A E RE T I R W h 6 F 3s u t a t S e t a n r e t l Al o r t n o C k s i D d e x i F h 7 [...]

  • Page 40

    HOST SOFTWARE INTERFACE 6 – 6 Reset and Interrupt Handling Reset and Interrupt Handling Reset and Interrupt Handling Reset and Interrupt Handling Reset and Interrupt Handling Reset Handling Reset Handling Reset Handling Reset Handling Reset Handling One of three different conditions may cause a reset: power on, hardware reset or software reset. A[...]

  • Page 41

    INTERFACE COMMANDS 7 – 1 SECTION 7 Interface Commands Interface Commands Interface Commands Interface Commands Interface Commands The following section describes the commands (and any parameters necessary to execute them), as well as Status and Error register bits affected. Read Commands Read Commands Read Commands Read Commands Read Commands Rea[...]

  • Page 42

    INTERFACE COMMANDS 7 – 2 Read Commands Read Commands Read Commands Read Commands Read Commands Read Sector(s) Read Sector(s) Read Sector(s) Read Sector(s) Read Sector(s) Reads from 1 to 256 sectors, as specified in the Command Block, beginning at the specified sector. (A sector count of 0 requests 256 sectors.) Immediately after the Command regis[...]

  • Page 43

    INTERFACE COMMANDS 7 – 3 Read DMA Read DMA Read DMA Read DMA Read DMA Multi-word DMA Identical to the Read Sector(s) command, except that 1 . The host initializes a slave-DMA channel prior to issuing the command, 2 . Data transfers are qualified by DMARQ and are performed by the slave-DMA channel and 3 . The drive issues only one interrupt per co[...]

  • Page 44

    INTERFACE COMMANDS 7 – 4 Set Multiple Mode Set Multiple Mode Set Multiple Mode Set Multiple Mode Set Multiple Mode Enables the controller to perform Read and Write Multiple operations, and establishes the block count for these commands. Before issuing this command, the Sector Count register should be loaded with the number of sectors per block. T[...]

  • Page 45

    INTERFACE COMMANDS 7 – 5 Write Multiple Write Multiple Write Multiple Write Multiple Write Multiple Performs similarly to the Write Sector(s) command, except that: 1 . The controller sets BSY immediately upon receipt of the command, 2 . Data transfers are multiple sector blocks and 3 . The Long bit and Retry bit is not valid. Command execution di[...]

  • Page 46

    INTERFACE COMMANDS 7 – 6 Set Feature Commands Set Feature Commands Set Feature Commands Set Feature Commands Set Feature Commands Set Features Mode Set Features Mode Set Features Mode Set Features Mode Set Features Mode Enables or disables features supported by the drive. When the drive receives this command it: 1 . Sets BSY, 2 . Checks the conte[...]

  • Page 47

    INTERFACE COMMANDS 7 – 7 Power Mode Commands Power Mode Commands Power Mode Commands Power Mode Commands Power Mode Commands Standby Immediate – 94h/E0h Standby Immediate – 94h/E0h Standby Immediate – 94h/E0h Standby Immediate – 94h/E0h Standby Immediate – 94h/E0h Spin down and do not change time out value. This command will spin the dr[...]

  • Page 48

    INTERFACE COMMANDS 7 – 8 When enabling the Automatic Power Down sequence, the value placed in the Sector Count register is multiplied by five seconds to obtain the Time-out Interval value. If no drive commands are received from the host within the Time-out Interval, the drive automatically enters the STANDBY mode. The minimum value is 5 seconds. [...]

  • Page 49

    INTERFACE COMMANDS 7 – 9 Initialization Commands Initialization Commands Initialization Commands Initialization Commands Initialization Commands Identify Drive Identify Drive Identify Drive Identify Drive Identify Drive Allows the host to receive parameter information from the drive. When the command is received, the drive: 1 . Sets BSY, 2 . Stor[...]

  • Page 50

    INTERFACE COMMANDS 7 – 10 D R O WN O I T P I R C S E D T N E T N O C 0 5d e v r e s e R 1 5e d o m r e f s n a r t a t a d O I P = 8 - 5 1 d e s u t o n = 0 - 7 2 5e d o m r e f s n a r t a t a d A M D = 8 - 5 1 d e s u t o n = 0 - 7 3 5d e v r e s e r = 5 1 d i l a v t o n e r a 8 8 s d r o w n i d e t r o p p u s s d l e i f e h t = 0 , d i l a[...]

  • Page 51

    INTERFACE COMMANDS 7 – 11 D R O WN O I T P I R C S E D T N E T N O C 3 8 t o n n o i t a c i f i t o n t e s d n a m m o c h F F F F r o h 0 0 0 0 = 4 8 d n a 3 8 , 2 8 s d r o w f I . d e t r o p p u s s t e s d n a m m o C . d e t r o p p u s o r e z o t d e r a e l c e b l l a h s = 5 1 e n o o t t e s e b l l a h s = 4 1 d e v r e s e r = 1 -[...]

  • Page 52

    INTERFACE COMMANDS 7 – 12 Initialize Drive Parameters Initialize Drive Parameters Initialize Drive Parameters Initialize Drive Parameters Initialize Drive Parameters Enables the drive to operate as any logical drive type. The drive will always be in the translate mode because of Zone Density Recording, which varies the number of sectors per track[...]

  • Page 53

    INTERFACE COMMANDS 7 – 13 Seek, Format and Diagnostic Commands Seek, Format and Diagnostic Commands Seek, Format and Diagnostic Commands Seek, Format and Diagnostic Commands Seek, Format and Diagnostic Commands Seek Seek Seek Seek Seek Initiates a seek to the track, and selects the head specified in the Command block. 1 . Sets BSY in the Status r[...]

  • Page 54

    INTERFACE COMMANDS 7 – 14 S.M.A.R.T. Command Set S.M.A.R.T. Command Set S.M.A.R.T. Command Set S.M.A.R.T. Command Set S.M.A.R.T. Command Set Execute S.M.A.R.T. Execute S.M.A.R.T. Execute S.M.A.R.T. Execute S.M.A.R.T. Execute S.M.A.R.T. The Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.) command has been implemented to improve the d[...]

  • Page 55

    SERVICE AND SUPPORT 8 – 1 SECTION 8 Service and Support Service and Support Service and Support Service and Support Service and Support Service Policy Service Policy Service Policy Service Policy Service Policy If a customer discovers a defect in a DiamondMax ® Plus 40 drive, Maxtor will, at its option, repair or replace the disk drive at no cha[...]

  • Page 56

    SERVICE AND SUPPORT 8 – 2 MaxFax MaxFax MaxFax MaxFax MaxFax ™ ™ ™ ™ ™ Service Service Service Service Service Use a touch-tone phone to order Technical Reference Sheets, Drive Specifications, Installation Sheets and other documents from our 24-hour automated fax retrieval system. Requested items are sent to your fax machine. U.S. and C[...]

  • Page 57

    GLOSSARY GL – 1 GLOSSAR Y Glossary Glossary Glossary Glossary Glossary A A A A A ACCESS ACCESS ACCESS ACCESS ACCESS To obtain data from, or place data into, RAM, a register, or data storage device. ACCESS TIME ACCESS TIME ACCESS TIME ACCESS TIME ACCESS TIME The interval between the issuing of an access command and the instant that the target data[...]

  • Page 58

    GLOSSARY GL – 2 CONTROLLER CONTROLLER CONTROLLER CONTROLLER CONTROLLER A miniature CPU dedicated to controlling a peripheral device, such as a disk drive, tape drive, video display terminal, or printer. The controller executes commands from the central processing unit and reissues commands to the peripheral device. CORRECTABLE ERROR CORRECTABLE E[...]

  • Page 59

    GLOSSARY GL – 3 EXTRA PULSE EXTRA PULSE EXTRA PULSE EXTRA PULSE EXTRA PULSE Term used in surface certification. It is when a flux field discontinuity remains after the recording surface is erased, thereby producing an electrical output of a read head passing over the area with the discontinuity. An extra pulse occurs when the electrical output is[...]

  • Page 60

    GLOSSARY GL – 4 L L L L L LANDING ZONE OR LZONE LANDING ZONE OR LZONE LANDING ZONE OR LZONE LANDING ZONE OR LZONE LANDING ZONE OR LZONE The cylinder number to where ParkHeads move the read/write heads. LATE BIT LATE BIT LATE BIT LATE BIT LATE BIT A bit that is in the late half of the data window. LATE WINDOW LATE WINDOW LATE WINDOW LATE WINDOW LA[...]

  • Page 61

    GLOSSARY GL – 5 PHASE MARGIN PHASE MARGIN PHASE MARGIN PHASE MARGIN PHASE MARGIN Measure in degrees of the amount of difference between excursions from the window center where flux reversals can occur and the edge of the data window. Similar to window margin. PHYSICAL SECTOR PHYSICAL SECTOR PHYSICAL SECTOR PHYSICAL SECTOR PHYSICAL SECTOR The smal[...]

  • Page 62

    GLOSSARY GL – 6 SOFT ERROR SOFT ERROR SOFT ERROR SOFT ERROR SOFT ERROR A data error which can be overcome by rereading the data or repositioning the head. SOFT SECTORED SOFT SECTORED SOFT SECTORED SOFT SECTORED SOFT SECTORED A technique where the controller determines the beginning of a sector by the reading of format information from the disk. T[...]