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Maxtor 93073H4 - page 1
DiamondMax ® 60 96147H8, 94610H6, 93073H4, 92305H3, 91536H2 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 thei ...
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Maxtor 93073H4 - page 2
Before You Begin Thank you for your interest in the Maxtor DiamondMax ® 60 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 performed only at an authorized repair center. For repair information, contact the ...
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Maxtor 93073H4 - page 3
DIAMONDMAX 60 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 Signa ...
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Maxtor 93073H4 - page 4
DIAMONDMAX 60 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 Mode ...
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Maxtor 93073H4 - page 5
DIAMONDMAX 60 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 Timing Par ...
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Maxtor 93073H4 - page 6
DIAMONDMAX 60 PRODUCT MANUAL iv Write Verify Sector(s) 7 - 4 Write Sector Buffer 7 - 4 Write DMA 7 - 5 Write Multiple 7 - 5 Mode Set/Check Commands 7 - 6 Set Features Mode 7 - 6 Read Native Max Address 7 - 7 Set Max 7 - 7 Set Max Password 7 - 7 Set Max Lock 7 - 7 Set Max Unlock 7 - 7 Set Max Freeze Lock 7 - 7 Power Mode Commands 7 - 8 Standby Immed ...
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Maxtor 93073H4 - page 7
DIAMONDMAX 60 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 IDE Inter ...
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Maxtor 93073H4 - page 8
DIAMONDMAX 60 – INTRODUCTION 1 – 1 SECTION 1 Introduction Maxtor Corporation Maxtor Corporation has been providing high-quality computer storage products since 1982. Along the way, we’ve seen many changes in data storage needs. Not long ago, only a handful of specific users needed more than a couple hundred megabytes of storage. Today, downlo ...
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Maxtor 93073H4 - page 9
DIAMONDMAX 60 – INTRODUCTION 1 – 2 Conventions If there is a conflict between text and tables, the table shall be accepted as being correct. Key Words The names of abbreviations, commands, fields and acronyms used as signal names are in all uppercase type (e.g., IDENTIFY DRIVE). Fields containing only one bit are usually referred to as the “n ...
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Maxtor 93073H4 - page 10
PRODUCT DESCRIPTION 2 – 1 SECTION 2 Product Description Maxtor DiamondMax ® 60 AT disk drives are 1-inch high, 3.5-inch diameter random access storage devices which incorporate an on-board ATA-5/Ultra DMA 100 controller. High capacity is achieved by a balanced combination of high areal recording density and the latest data encoding and servo tec ...
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Maxtor 93073H4 - page 11
PRODUCT DESCRIPTION 2 – 2 Product Features Functional / Interface Maxtor DiamondMax 60 hard drives contain all necessary mechanical and electronic parts to interpret control signals and commands from an AT-compatible host computer. See Section 3 Product Specifications, for complete drive specifications. Zone Density Recording The disk capacity is ...
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Maxtor 93073H4 - 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) Each drive model has a fixed number o ...
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Maxtor 93073H4 - page 13
PRODUCT DESCRIPTION 2 – 4 Major HDA Components Drive Mechanism A brush-less DC direct drive motor rotates the spindle at 5,400 RPM (±0.1%). The dynamically balanced motor/spindle assembly ensures minimal mechanical run-out to the disks. A dynamic brake provides a fast stop to the spindle motor upon power removal. The speed tolerance includes mot ...
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Maxtor 93073H4 - page 14
PRODUCT DESCRIPTION 2 – 5 JUMPER CONFIGURATION J50 J48 J46 J44 J42 Master/Slave Only drive in single drive system* Master drive in dual drive system* Slave drive in dual drive system C C O Cable Select Disabled* Enabled O C Cylinder Limitation Disabled* Enabled O C Factory Reserved O Factory Reserved O Key * = Default C = Closed (jumper installed ...
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Maxtor 93073H4 - page 15
PRODUCT SPECIFICATIONS 3 – 1 SECTION 3 Product Specifications Models and Capacities Performance Specifications MODEL 96147H8 94610H6 93073H4 92305H3 91536H2 Integrated Interface ATA-5 / Ultra DMA Encoding Method E 2 PR4 RLL 16/17 Interleave 1:1 Servo System Embedded Buffer Size / Type 2 MB SDRAM Data Zones per Surface 16 Data Surfaces / Heads 864 ...
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Maxtor 93073H4 - page 16
PRODUCT SPECIFICATIONS 3 – 2 Physical Dimensions (maximum) Figure 3 - 1 Outline and Mounting Dimensions PARAMETER STANDARD METRIC Height 1.028 inches 26.1 millimeters Length 5.787 inches 147 millimeters Width 4.00 inches 101.6 millimeters Weight 1.3 pounds 0.59 kilograms ...
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Maxtor 93073H4 - page 17
PRODUCT SPECIFICATIONS 3 – 3 Power Requirements Power Mode Definitions Spin-up The drive is spinning up following initial application of power and has not yet reached full speed. Seek A random access operation by the disk drive. Read/Write Data is being read from or written to the drive. Idle The drive is spinning, the actuator is parked and powe ...
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Maxtor 93073H4 - page 18
PRODUCT SPECIFICATIONS 3 – 4 Reliability Specifications Annual Return Rate < 1.0% Annual Return Rate (ARR) indicates the average against products shipped. ARR includes all reasons for returns (failures, handling damage, NDF), but does not include inventory credit returns. Quality Acceptance Rate < 1,000 DPPM The quality acceptance rate indi ...
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Maxtor 93073H4 - page 19
PRODUCT SPECIFICATIONS 3 – 5 EMC/EMI Radiated Electromagnetic Field Emissions - EMC Compliance The hard disk drive mechanism is designed as a subassembly for installation into a suitable enclosure and is therefore not subject to Subpart J of Part 15 of FCC Rules (47CFR15) or the Canadian Department of Communications Radio Interference Regulations ...
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Maxtor 93073H4 - page 20
INSTALLATION 4 – 1 SECTION 4 Handling and Installation Hard Drive Handling Precautions ◆ If the handling precautions are not followed, damage to the hard drive may result - which may void the warranty. ◆ During handling, NEVER drop, jar, or bump a drive. Handle the drive by its sides and avoid touching the printed circuit board assembly (PCBA ...
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Maxtor 93073H4 - page 21
INSTALLATION 4 – 2 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, inspect drives for evidence of shipping damage or loose hardware. If a drive is damaged (and no contai ...
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Maxtor 93073H4 - page 22
INSTALLATION 4 – 3 Figure 4 - 2 Single Pack Shipping Container (Option A) Figure 4 - 3 Single Pack Shipping Container (Option B) Repacking If a Maxtor drive requires return, repack it using Maxtor packing materials, including the antistatic bag. Physical Installation Recommended Mounting Configuration The DiamondMax ® drive design allows greater ...
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Maxtor 93073H4 - page 23
INSTALLATION 4 – 4 Before You Begin Important – Please Read Please read this installation section completely before installing the Maxtor hard drive. It gives general information for installing a Maxtor hard drive in a typical computer system. If you don’t understand the installation steps, have a qualified computer technician install the har ...
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Maxtor 93073H4 - page 24
INSTALLATION 4 – 5 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 screws. Attach the Interface and Power Cables Do not force or rock the connectors into their sockets on the hard drive. Push them in straight until they are ...
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Maxtor 93073H4 - page 25
AT INTERFACE DESCRIPTION 5 – 1 SECTION 5 AT Interface Description Interface Connector All DiamondMax ® 60 AT drives have a 4 0- pin ATA interface connector mounted on the PCBA. The drive may connect directly to the host; or it can also accommodate a cable connection (maximum cable length: 18 inches). Figure 5 - 1 Data Connector Pin Description S ...
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Maxtor 93073H4 - page 26
AT INTERFACE DESCRIPTION 5 – 2 Pin Description Table PIN NAME PIN I/O SIGNAL NAME SIGNAL DESCRIPTION RESET - 01 I Host Reset Reset signal from the host system. Active during power up and inactive after. DD0 17 I/O Host Data Bus 16 bit bi-directional data bus between host and drive. Lower 8 bits used for register and ECC byte transfers. All 16 bit ...
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Maxtor 93073H4 - page 27
AT INTERFACE DESCRIPTION 5 – 3 TIMING PARAMETERS MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 t0 Cycle Time (min) 600 ns 383 ns 240 ns 180 ns 120 ns t1 Address valid to DIOR-/DIOW- setup (min) 70 ns 50 ns 30 ns 30 ns 25 ns t2 DIOR-/DIOW- 16-bit (min) 165 ns 125 ns 100 ns 80 ns 70 ns t2i DIOR-/DIOW- recovery time (min) 70 ns 25 ns t3 DIOW- data setup (min) ...
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Maxtor 93073H4 - page 28
AT INTERFACE DESCRIPTION 5 – 4 DMA Timing TIMING PARAMETERS MODE 0 MODE 1 MODE 2 t0 Cycle Time (min) 480 ns 150 ns 120 ns tC DMACK to DMARQ delay tD DIOR-/DIOW- (min) 215 ns 80 ns 70 ns tE DIOR- data access (min) 150 ns 60 ns tF DIOR- data hold (min) 5 ns 5 ns 5 ns tG DIOR-/DIOW- data setup (min) 100 ns 30 ns 20 ns tH DIOW- data hold (min) 20 ns ...
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Maxtor 93073H4 - page 29
AT INTERFACE DESCRIPTION 5 – 5 Ultra DMA Timing TIMING PARAMETERS (all times in nanoseconds) MODE 0 MODE 1 MODE 2 MODE 3 MODE 4 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX t CYC Cycle Time (from STROBE edge to STROBE edge) 112 73 54 39 25 t2 CYC Two cycle time (from rising edge to next rising edge or from falling edge to next falling edge of STROBE ) ...
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Maxtor 93073H4 - page 30
AT INTERFACE DESCRIPTION 5 – 6 Figure 5 - 5 Sustained Ultra DMA Data In Burst t DVH DSTROBE at device DD(15:0) at device 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 5 - ...
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Maxtor 93073H4 - 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) HDMARDY- (hos ...
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Maxtor 93073H4 - page 32
AT INTERFACE DESCRIPTION 5 – 8 t DH t DS t DVH HSTROBE at host DD(15:0) at host HSTROBE at device DD(15:0) at device t DVH t CY C 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 t ACK ...
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Maxtor 93073H4 - 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 ACK ...
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Maxtor 93073H4 - 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 ...
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Maxtor 93073H4 - page 35
HOST SOFTWARE INTERFACE 6 – 1 SECTION 6 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 commands and command parameters and the Control/Diagnostic registers. Task File Registers The Task F ...
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Maxtor 93073H4 - page 36
HOST SOFTWARE INTERFACE 6 – 2 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- sector operation decrements the Sector Count register. If an error occurs during such a ...
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Maxtor 93073H4 - page 37
HOST SOFTWARE INTERFACE 6 – 3 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 interrupt request to the host clears; invalid commands abort. (Detailed ...
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Maxtor 93073H4 - page 38
HOST SOFTWARE INTERFACE 6 – 4 COMMAND NAME COMMAND CODE PARAMETERS USED b7 b6 b5 b4 b3 b2 b1 b0 F SC SN C SDH Recalibrate 0 0 0 1 xxxx N N N N D Read Sector(s) 0 0 1 0 0 0 L x N Y Y Y Y Read DMA 1 1 001 00 x N Y Y Y Y Write Sector(s) 0 0 11 00L x N Y Y Y Y Write DMA 1 1 0 0 1 0 1 x N Y Y Y Y Write Verify Sector(s) 0 0 1 1 1 1 0 0 N Y Y Y Y Read V ...
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Maxtor 93073H4 - page 39
HOST SOFTWARE INTERFACE 6 – 5 Control Diagnostic Registers These I/O port addresses reference three Control/Diagnostic registers: I/O PORT READ WRITE 3F6h Alternate Status Fixed Disk Control 3F7h Digital Input Not used Alternate Status Register Contains the same information as the Status register in the Task File. However, this register may be re ...
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Maxtor 93073H4 - page 40
HOST SOFTWARE INTERFACE 6 – 6 Reset and Interrupt Handling Reset Handling One of three different conditions may cause a reset: power on, hardware reset or software reset. All three cause the interface processor to initialize itself and the Task File registers of the interface. A reset also causes a set of the Busy bit in the Status register. The ...
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Maxtor 93073H4 - page 41
INTERFACE COMMANDS 7 – 1 SECTION 7 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 Sector(s) Read Verify Sector(s) Read Sector Buffer Read DMA Multi-word DMA Ultra DMA Read Multiple Set Multiple Write Commands Wri ...
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Maxtor 93073H4 - page 42
INTERFACE COMMANDS 7 – 2 Read Commands 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 register is written, the drive sets the BSY bit and begins execution of the command. If the drive is not already on the d ...
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Maxtor 93073H4 - page 43
INTERFACE COMMANDS 7 – 3 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 command to indicate that data transfer ha ...
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Maxtor 93073H4 - page 44
INTERFACE COMMANDS 7 – 4 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. The drives support block sizes of 2, 4, 8 and 16 sectors. When this comma ...
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Maxtor 93073H4 - page 45
INTERFACE COMMANDS 7 – 5 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 differs from Write Sector(s) because: 1. Several sectors transfer ...
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Maxtor 93073H4 - page 46
INTERFACE COMMANDS 7 – 6 Mode Set/Check Commands Set Features Mode Enables or disables features supported by the drive. When the drive receives this command it: 1. Sets BSY, 2. Checks the contents of the Features register, 3. Clears BSY and 4. Generates an interrupt. If the value of the register is not a feature supported by the drive, the comman ...
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Maxtor 93073H4 - page 47
INTERFACE COMMANDS 7 – 7 Read Native Max Address This command returns the native maximum address. The native maximum address is the highest address accepted by the drive in the factory default condition. The native maximum address is the maximum address that is valid when using the SET MAX ADDRESS command. Set Max Individual SET MAX commands are ...
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Maxtor 93073H4 - page 48
INTERFACE COMMANDS 7 – 8 Power Mode Commands Standby Immediate – 94h/E0h Spin down and do not change time out value. This command will spin the drive down and cause the drive to enter the STANDBY MODE immediately. If the drive is already spun down, the spin down sequence is not executed. Idle Immediate – 95h/E1h Spin up and do not change time ...
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Maxtor 93073H4 - page 49
INTERFACE COMMANDS 7 – 9 Default Power-on Condition The drive’s default power on condition is the ACTIVE MODE. Upon receiving a Power Mode command, except the SLEEP MODE command, the drive sets BSY and performs the requested power operation. Once the requested Power Mode change has begun, the drive resets BSY and generates an interrupt - withou ...
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Maxtor 93073H4 - page 50
INTERFACE COMMANDS 7 – 10 Initialization Commands Identify Drive Allows the host to receive parameter information from the drive. When the command is received, the drive: 1. Sets BSY, 2. Stores the required parameter information in the sector buffer, 3. Sets the DRQ bit and 4. Generates an interrupt. The host may then read the information out of ...
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Maxtor 93073H4 - page 51
INTERFACE COMMANDS 7 – 11 -WORD CONTENT DESCRIPTION 50 Reserved 51 - 52 Obsolete 53 15 -3 = reserved 2, 1 = the fields supported in words 88 are valid, 0 = the fields supported in words 88 are not valid 1, 1 = the fields reports in words 64-70 are valid, 0 = the fields reports in words 64-70 are not valid 0, 1 = the fields reports in words 54-58 ...
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Maxtor 93073H4 - page 52
INTERFACE COMMANDS 7 – 12 WORD CONTENT DESCRIPTION 83 Command sets supported. If words 82 and 83 = 0000h or FFFFh command set notification not supported. 15-10, as currently defined 9, 1 = Automatic Acoustic Management feature set supported 8-0, as currently defined 84 Command set extensions supported. If words 84, 85 and 86 = 0000h or FFFFh comm ...
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Maxtor 93073H4 - page 53
INTERFACE COMMANDS 7 – 13 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 depending on the zone. Through setting the Sector Count Register and Drive Head Register, this command lets the ...
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Maxtor 93073H4 - page 54
INTERFACE COMMANDS 7 – 14 Seek, Format and Diagnostic Commands Seek Initiates a seek to the track, and selects the head specified in the Command block. 1. Sets BSY in the Status register, 2. Initiates the Seek, 3. Resets BSY and 4. Generates an interrupt. The drive does not wait for the seek to complete before returning the interrupt. If a new co ...
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Maxtor 93073H4 - page 55
INTERFACE COMMANDS 7 – 15 S.M.A.R.T. Command Set 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 data integrity and data availability of hard disk drives. In some cases, a S.M.A.R.T. capable device will predict an impending failure with sufficient time to allow user ...
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Maxtor 93073H4 - page 56
SERVICE AND SUPPORT 8 – 1 SECTION 8 Service and Support Service Policy If a customer discovers a defect in a DiamondMax ® 6 0 drive, Maxtor will, at its option, repair or replace the disk drive at no charge to the customer, provided it is returned during the warranty period. Drives must be properly packaged in Maxtor packaging or Maxtor-approved ...
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Maxtor 93073H4 - page 57
SERVICE AND SUPPORT 8 – 2 MaxFax ™ 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 Canada Language support: English Phone 800-2MAXTOR, listen for option (800-26 ...
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Maxtor 93073H4 - page 58
GLOSSARY GL – 1 GLOSSAR Y Glossary A ACCESS To obtain data from, or place data into, RAM, a register, or data storage device. ACCESS TIME The interval between the issuing of an access command and the instant that the target data may be read or written. Access time includes seek time, latency and controller overhead time. ADDRESS A number, general ...
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Maxtor 93073H4 - page 59
GLOSSARY GL – 2 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 An error that can be overcome by the use of Error Detecti ...
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Maxtor 93073H4 - page 60
GLOSSARY GL – 3 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 larger than a specified threshold. F FEEDBACK I ...
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Maxtor 93073H4 - page 61
GLOSSARY GL – 4 L LANDING ZONE OR LZONE The cylinder number to where ParkHeads move the read/write heads. LATE BIT A bit that is in the late half of the data window. LATE WINDOW A data window that has been shifted in a late direction to facilitate data recovery. LATENCY A delay encountered in a computer when waiting for a specific response. In a ...
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Maxtor 93073H4 - page 62
GLOSSARY GL – 5 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 The smallest grouping of data on the hard disk; always 512 bytes. PIO Programmable Input Output. A means of accessing device ...
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Maxtor 93073H4 - page 63
GLOSSARY GL – 6 SOFT ERROR A data error which can be overcome by rereading the data or repositioning the head. SOFT SECTORED A technique where the controller determines the beginning of a sector by the reading of format information from the disk. This is contrasted to hard sectoring where a digital signal indicates the beginning of a sector on a ...
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