Related Manuals for Conner CFP4207 Series
Summary of Contents for Conner CFP4207 Series
- Page 1 CFP4207 Series Intelligent Disk Drive Product Manual October 1995 Pre-Release Revision A 3081 Zanker Road San Jose, CA 95134-2128 (408) 456-4500...
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Page 3: Fcc Notice
Printing Office, Washington, DC 20402. Warning: Changes or modifications made to this equipment which have not been expressly approved by Conner Peripherals, Inc. may cause radio and television interference problems that could void the user's authority to operate the equipment. - Page 4 Conner Peripherals, Inc. Conner Peripherals, Inc. provides this manual "as is," without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Conner Peripherals, Inc.
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Page 5: Table Of Contents
Table of Contents 1. Overview of the Drives What are the Drives? Differences Between the Models Features of the Drive Drive Composition Mechanical Design Features Drive Assembly Housing Head Positioning Mechanism Read/Write Heads and Disks Data and Power Connections Electrical Design Features Integrated Circuit Circuit Board Firmware... - Page 6 Table of Contents Filepro CFP4207 Series Magnetic Field: Acoustic Noise: Safety Standards Physical Characteristics - CFP4207E Physical Characteristics - CFP4207S Physical Characteristics - CFP4207W 3. Drive Operations Functions of the Drive Drive Operational Modes Data Error Correction Downloadable Microcode Command Execution and Buffer Management...
- Page 7 Filepro CFP2107 Series Table of Contents Delaying Spin Up at Power On - CFP4207W Disabling the SCSI Bus Parity - CFP4207W Disabling SCSI Bus Terminator Power (TERMPWR) - CFP4207W Using the J5 Auxiliary Connector - SEL0 - XTFAULT - SEL1 - VUNIQ - SEL2 - SPSYNC...
- Page 8 Table of Contents Filepro CFP4207 Series Internal Termination J5 Auxiliary Connector Signal Characteristics Cable Requirements Connector Requirements Interface Pin Assignments Interface Timing Requirements 6. SCSI Command Implementation SCSI Command Summary Drive Dependent SCSI Data Format Drive Page - 03 H...
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Page 9: Overview Of The Drives
Overview of the Drives What are the Drives? The CFP4207 series is a family of high performance 3.5-inch half height 4.2GB (formatted) disk drives. They all offer 9.0 millisecond average seek time for Reading, 9.5 millisecond seek time for Writing, with an average latency of only 4.17 ms. -
Page 10: Features Of The Drive
Down-loadable Code through SCSI Interface • 1,7 run length limited code • Programmable Block Size of 512 or 1024-bytes standard. Other block sizes optionally available. • Tagged Command Queuing with Seek Re-ordering and Write/Read Coalescing Page 2 Filepro CFP4207 Series... -
Page 11: Drive Composition
Overview of the Drives Chapter 1 Drive Composition The drive is composed of mechanical, electrical, and firmware elements. Mechanical Design Features The drive’s hardware includes the components described in the following sections. Figure 1-1 shows the drive top level assembly. Figure 1-1 Drive Top Level Assembly Damper... -
Page 12: Drive Assembly Housing
Figure 1-2 Head-Disk Assembly Top Cover Disk Clamp Disk (1 of 10) Gasket Head-Stack Preamplifier/ Assembly Flex Circuit Assembly Disk Spacer (1 of 9) Spindle Motor Actuator 4207_1_2 Magnet Base Assembly Assembly Page 4 Filepro CFP4207 Series... -
Page 13: Head Positioning Mechanism
The TPC air bearing surface allows the head to fly at a uniform height regardless of radial position. This improves data reliability and allows the aerial density to be more uniform with radius. The CFP4207 series contains ten sputtered thin film disks with twenty data surfaces and twenty read/write heads. -
Page 14: Firmware
• parsing the Command Descriptor Block and checking for illegal fields • converting the LBA to CHS and initiating read and write operations to the background processor • defect management Page 6 Filepro CFP4207 Series... - Page 15 Overview of the Drives Chapter 1 • serial port communications Since parsing/decoding of commands and execution of the Read/Write functions are handled by separate processors, command execution can be overlapped in multiple initiator or Tagged Command Queuing environments. Functions such as seek re-ordering and command coalescing can also be overlapped when the drive is operating with a host environment capable of supporting Tagged Command Queuing.
- Page 16 Chapter 1 Overview of the Drives Page 8 Filepro CFP4207 Series...
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Page 17: Specifications
Specifications Specifications in this Chapter This chapter provides the following specifications for the drive: • drive capacity • physical configuration • performance characteristics • read/write characteristics • reliability • power requirements • environmental tolerances • safety standards • physical characteristics Technical Reference Manual Page 9... -
Page 18: Drive Capacity
Chapter 2 Specifications Drive Capacity Formatted Capacity* • CFP4207 Series: 4295 MB *1MB is equal to 10 or 1,000,000 bytes Physical Configuration Specification: CFP4207 Series Sputtered Thin film Disk Type Head Type Thin Film - TPC Rotary Voice-Coil Actuator Type... -
Page 19: Performance Characteristics
Specifications Chapter 2 Performance Characteristics Seek Times (typical)* • Track to Track: 2.0 msec • Average (read/write): 9.0/9.5 msec ** • Full Stroke: 18 msec * The timing is measured from the time the last byte of the command descriptor block is written to the time seek is initiated by the drive operating at nominal DC input voltage and nominal operating temperature. -
Page 20: Read/Write Characteristics
• To/from Buffer, synchronous narrow: 10.0 MByte/second • To/from Buffer, synchronous wide: 20.0 MByte/second Maximum Synchronous Transfer Offset: • 15 bytes/words Maximum Tagged Command Queue Depth: • 32 commands Buffer Size: • 512 KB, segmentable Page 12 Filepro CFP4207 Series... -
Page 21: Reliability
Component Design Life • 5 years Start/Stop Cycles • 20,000 minimum Mean Time Between Failures: • 1,000,000 power-on hours* * Projected MTBF based on comparison of similar Conner products Preventive Maintenance • None Technical Reference Manual Page 13... -
Page 22: Power Requirements (Typical)
2 Maximum Start current on +12V DC line. Minimum/Maximum Voltage: • +5V: +5% • +12V: +5% Maximum Peak-to-Peak Allowable Noise (DC to 1 Mhz: equivalent resistive load): • +5V: 2% • +12V: 1% Page 14 Filepro CFP4207 Series... -
Page 23: Environmental Tolerances
Specifications Chapter 2 Environmental Tolerances Temperature: • Operating: 5° to 55° C • Non-operating: -40° to 60° C • Thermal Gradient: 20° C per hour maximum Relative Humidity (non-condensing): • Operating: 5 to 95% • Non-operating: 5 to 95% • Maximum Wet Bulb: 29°C Altitude (relative to sea level): •... -
Page 24: Safety Standards
IEC 380, Safety of Electrically Energized Office Machines • IEC 950, Safety of information Technology Equipment Including Electrical Business Equipment • VDE 0805, VDE 0805 TIEL 100, and VDE 0806 • Complies with FCC Class B, Part 15, Subpart J Page 16 Filepro CFP4207 Series... -
Page 25: Physical Characteristics - Cfp4207E
Specifications Chapter 2 Physical Characteristics - CFP4207E Height: Width: • 1.625 inch + .020 • 4.0 inches + .015 Weight: Depth: • • 2.5 pounds 5.75 inches +.030 / .010 Figure 2-2 The Drive’s Physical Dimensions 4.000 +0.015 [101.60 +0.38] 0.41 [10.41] MAXIMUM Zone... -
Page 26: Physical Characteristics - Cfp4207S
2.375 +0.015 [60.33 +0.38] .63 [16.00] .250 [6.36] .125 +0.010 3.750 [95.25] [3.18 +0.25] 1.625 +0.02 [41.28 +0.51] 3.413 +0.018 .065 +0.018 Tolerance: .xxx +.005 [86.69 +0.46] [1.65 +0.46] .xx +.020 2.623 +0.018 [66.62 +0.46] 4207-2-3 Page 18 Filepro CFP4207 Series... -
Page 27: Physical Characteristics - Cfp4207W
Specifications Chapter 2 Physical Characteristics - CFP4207W Height: Width: • 1.625 inch + .020 • 4.0 inches + .015 Weight: Depth: • • 2.5 pounds 5.75 inches +.030 / .010 Figure 2-4 The Drive’s Physical Dimensions 4.000 +0.015 [101.60 +0.38] .198 +0.016 [5.03 +0.41] 1.977 +0.018... - Page 28 Chapter 2 Specifications Page 20 Filepro CFP4207 Series...
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Page 29: Drive Operations
Drive Operations Functions of the Drive This chapter describes certain operational aspects of the drive, including discussions of: • drive operational modes • error correction • read error recovery • downloadable microcode • buffer management Drive Operational Modes For the purpose of defining power requirements the following modes have been defined: •... -
Page 30: Data Error Correction
The RAM code may be upgraded on the disk via the factory serial port or through the interface using the WRITE BUFFER command. Refer to the WRITE BUFFER command in the Eleventh Generation SCSI Interface Manual for a discussion of the procedure. Page 22 Filepro CFP4207 Series... -
Page 31: Command Execution And Buffer Management
Drive Operations Chapter 3 Command Execution and Buffer Management The drive dynamically adapts to queuing and non queuing depending on whether a Queue Tag Message is presented with the command. A 512Kbyte onboard segmented buffer is dynamically configured to adapt to the particular drive configuration or operating environment. -
Page 32: Coalescing
Active Segment. The retention of data already transferred to the host and read look ahead in the Active Segment buffer is controlled by the state of the Read Retention Priority. Page 24 Filepro CFP4207 Series... - Page 33 Drive Operations Chapter 3 Read Retention On (Read Retention Priority = 0 or F): The interface processor initiates a full segment read of 253 sectors (FD blocks) to the background processor. There are three different situations which would be considered a cache hit on a subsequent read. •...
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Page 34: Write Caching
If the reassignment fails, the drive will continue to reassign the block until all the space in the grown defect list is filled (147 sectors, maximum). Page 26 Filepro CFP4207 Series... -
Page 35: Installing The Drive
Installing the Drive Take These Precautions To protect your equipment from electrostatic damage, perform the installation at a static-safe workstation. If one is not available, follow these guidelines: 1. Work in an uncarpeted area. 2. Before removing the equipment from its anti-static bag, discharge static electricity by touching your computer's metal chassis (or any other grounded object) while touching the anti-static bag. -
Page 36: Installing A Cfp4207E
Ground Ground Open Open Open Open Ground Ground Open Open Ground Open Ground Open Ground Ground Ground Open Ground Open Open Ground Ground Ground Open Ground Ground Open Ground Ground Ground Ground Ground Ground Ground Page 28 Filepro CFP4207 Series... -
Page 37: Disabling Spin-Up At Power On - Cfp4207E
Installing the Drive Chapter 4 Disabling Spin-Up at Power On - CFP4207E Spin up upon application of power to the drive can be disabled by grounding the RMT_START line on the interface. Disabling spin up on application of power can also be enabled by setting the DSPN bit in MODE SELECT page 00 (Vendor Specific Parameters). -
Page 38: Mounting The Drive - Cfp4207E
Placing the drive at the source of the shortest air flow path helps to ensure adequate air flow and avoids pre-heating of the air by other heat generating sources. Page 30 Filepro CFP4207 Series... -
Page 39: Installing A Cfp4207S
Installing the Drive Chapter 4 Installing a CFP4207S The following paragraphs describe the installation procedure for a 8-bit, 50-pin SCSI-2 interface, model CFP4207S or CFP1007S drive. Setting the Drive's Jumpers - CFP4207S Figure 4-3 shows you where the drive’s jumpers are located. Figure 4-3 Jumper Locations pin 1... - Page 40 Note: When controlling the SCSI ID remotely, In = Ground or TTL Low and Out = Open or TTL High. The odd numbered pins (lower row) are grounded and the even numbered pins carry the signal. Page 32 Filepro CFP4207 Series...
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Page 41: Disabling Spin-Up At Power On - Cfp4207S
Installing the Drive Chapter 4 Disabling Spin-Up at Power On - CFP4207S A jumper in the E5 location, disables spin up after power-on for applications where spin up sequencing is necessary. Disabling spin up on application of power can also be enabled by setting the DSPN bit in MODE SELECT page 00 (Vendor Specific Parameters). -
Page 42: Disabling The Scsi Bus Parity - Cfp4207S
5. The TERMPWR line can be disconnected from the drive by removing Jumper E8. Table 4-10 Disabling SCSI Bus TERMPWR Jumper E8 Result TERMPWR (J2, Pin #26) connected to the drive's internal termination power. TERMPWR (J2, Pin #26) open circuit. Page 34 Filepro CFP4207 Series... -
Page 43: Setting The Bus Termination - Cfp4207S
Installing the Drive Chapter 4 Setting the Bus Termination - CFP4207S This drive provides on-board Alternative 2 active termination for the SCSI bus. The termination resistors, which are contained in two Single Inline Packs (SIPs) should be removed from the drive unless it is a SCSI device at the physical end of the bus. -
Page 44: Cabling The Drive - Cfp4207S
Synchronization is enabled by setting the appropriate bits in the RPL field of Mode Select page 04. Refer to the Eleventh Generation Disk Drive SCSI-2 Interface Manual for a description of the command implementation. The synchronization tolerance is 1%. Page 36 Filepro CFP4207 Series... -
Page 45: Attaching Power To The Drive - Cfp4207S
Installing the Drive Chapter 4 Attaching Power to the Drive - CFP4207S The drive has a 4-pin DC power connector, J4 mounted on the PCB. The recommended mating connector is AMP part number 1-480424-0 utilizing AMP pins, part number 350078-4 or equivalent. Connect the DC Power cable to the drive as shown in Figure 4-5. - Page 46 Placing the drive at the source of the shortest air flow path helps to ensure adequate air flow and avoids pre-heating of the air by other heat generating sources. Page 38 Filepro CFP4207 Series...
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Page 47: Installing A Cfp4207W
Installing the Drive Chapter 4 Installing a CFP4207W Setting the Drive’s Jumpers - CFP4207W Figure 4-6 shows you where to access the drive’s jumpers. Figure 4-6 Jumper Locations OE5, Disable Spin 2107_4_6 E7 (Disable Parity) E1. . .E4 E6 (Delay Spin) E5 (Disable Spin) Technical Reference Manual Page 39... -
Page 48: Setting The Scsi Bus Address - Cfp4207W
In/Ground In/Ground In/Ground Note: Open means open circuit or high impedance. Ground means TTL logic low or logic ground. The odd numbered pins (lower row) are grounded and the even numbered pins carry the signal. Page 40 Filepro CFP4207 Series... -
Page 49: Disabling Spin-Up At Power On - Cfp4207W
Installing the Drive Chapter 4 Disabling Spin-Up at Power On - CFP4207W A jumper in the E5 location, disables spin up on power-on for applications where spin up sequencing is necessary. Disabling spin up on application of power can also be enabled by setting the DSPN bit in MODE SELECT page 00 (Vendor Specific Parameters). -
Page 50: Disabling The Scsi Bus Parity - Cfp4207W
1 when it is asserted for the purpose of selection or arbitration. This signal is latched within 250 msec of the application of valid power to the drive or optionally the negation of -RST. Page 42 Filepro CFP4207 Series... -
Page 51: Xtfault
Installing the Drive Chapter 4 If SCSI ID SEL0 is intended to be selected, the host must provide a low impedance connection from - SEL (0) to - XTFALT or to ground, while the ID is being latched, through an appropriate means. Refer to chapter 5 for specific electrical characteristics of these signals. -
Page 52: Sel3
-XTFALT or -VUNIQ, or both. This signal is intended to be used as a power failure warning and/or as a write protect input. This signal is not supported by this drive. Page 44 Filepro CFP4207 Series... -
Page 53: Setting The Bus Termination - Cfp4207W
Installing the Drive Chapter 4 Setting the Bus Termination - CFP4207W This drive provides on board Alternative 2 active termination for the SCSI bus. The termination resistors, which are contained in three Single Inline Packs (SIPs) should be removed from the drive unless it is a SCSI device at the physical end of the bus. -
Page 54: Cabling The Drive - Cfp4207W
0.050 inches (1.27mm) gap between cable runs. • Do not clamp the cable tightly against a metal chassis since this will degrade the signal. Use spacers or a non-flammable insulation material to maintain a gap between the chassis and the cable. Page 46 Filepro CFP4207 Series... -
Page 55: Mixing Wide And Narrow Scsi Devices On A Scsi Bus
Installing the Drive Chapter 4 Mixing Wide and Narrow SCSI Devices on a SCSI Bus It may sometimes be desirable to attach Narrow SCSI devices such as tape backup devices or CDROMs to the same SCSI Host Bus Adapter being used to control Wide SCSI devices, such as the CFP4207W/CFP1007W. -
Page 56: Attaching Power To The Drive - Cfp4207W
6-32 UNC -2B X 0.16 maximum insertion length screws. Refer to Figure 2-4 in Chapter 2 for the location of the mounting holes. The drive may be mounted in any orientation. Page 48 Filepro CFP4207 Series... -
Page 57: Cooling
Installing the Drive Chapter 4 Cooling The enclosure design for the drive must provide adequate provision for removing heat generated by the drive via conduction or air flow convection cooling. The maximum operating temperature for the drive is 55°C. A temperature sensor mounted on the drive at the location shown below should remain at or below 55°C while the drive(s) are operated at the worst case condition. - Page 58 Chapter 4 Installing the Drive Page 50 Filepro CFP4207 Series...
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Page 59: Interface Physical Characteristics
Interface Physical Characteristics Electrical Description The paragraphs which follow describe the input and output electrical characteristics of the drive. Output Characteristics The output drivers for Data, Parity, REQ and ACK are optionally active negation. When they are set for active negation, they have three states: asserted, negated and high impedance. -
Page 60: Input Characteristics
The sections which follow describe, for each of the drive models, those SCSI characteristics which vary from model to model. These characteristics include: • Termination • Cable requirements • Connector requirements • Connector Pin assignments • Interface Timing requirements Page 52 Filepro CFP4207 Series... -
Page 61: Cfp4207E (Wide, 80-Pin Single Connector Attachment [Sca])
SCSI Physical Characteristics Chapter 5 CFP4207E (WIDE, 80-pin Single Connector Attachment [SCA]) External Terminator Power The interface connector carries both power and ground so a separate TERMPWR interface line is not provided. Internal Termination This version of the drive has no on-board termination so the drive must be externally terminated. -
Page 62: Spindle Sync
Electrical Characteristics for the SCSI ID Signals SCSI ID (0) - (3) State Current Voltage < +100 µA Open 2.4 V < V < V + 0.5 V 0 < I Ground 0 < I < -3 mA -0.5 V < V < 0.4 V Page 54 Filepro CFP4207 Series... -
Page 63: Interface Pin Assignments
SCSI Physical Characteristics Chapter 5 Interface Pin Assignments The pin assignments for the interface connector are shown below: Table 5-8 Interface Signal Definitions Signal Signal +12 Volt +12 Volt Ground +12 Volt +12 Volt Ground +12 Volt +12 Volt Ground +12 Volt +12 Volt Ground Reserved / NC... -
Page 64: Interface Timing Requirements
30 ns 80 ns Transmit Setup Time 23 ns 23 ns Notes: 1 This time does not apply at the SCSI connector of the drive. 2 This is a recommended time. It is not mandatory. Page 56 Filepro CFP4207 Series... -
Page 65: Model Cfp4207S (Narrow, 50-Pin Scsi)
SCSI Physical Characteristics Chapter 5 Model CFP4207S (Narrow, 50-pin SCSI) External Terminator Power Power to the on-board terminators is provided by the higher of the voltage supplied at Pin #26, J2 or the voltage level at the 5 Volt power input to the drive minus one diode drop. -
Page 66: Cable Requirements
Table 5-12 Interface Cable Electrical Characteristics Specification Value Signal Attenuation 0.095dB maximum per meter at 5 Mhz Pair-to-Pair Propagation Delay Delta 0.20 ns maximum per meter DC Resistance 0.230 ohms maximum per meter at 20° C Page 58 Filepro CFP4207 Series... -
Page 67: Connector Requirements
SCSI Physical Characteristics Chapter 5 Connector Requirements The connector on the drive is a 50-position header which consists of 2 rows of 25 male pins on 0.100 inch centers. The mating connector is a SCSI-2 Non-shielded Alternative 1, A-cable connector which is shown below: Figure 5-2 A-Cable Connector Contact 50... -
Page 68: Interface Pin Assignments
-I/O Notes: 1. The minus sign (-) indicates active low. 2. All odd pins except pin 25 must be connected to ground. Pin 25 is left open. 3. Pins marked Reserved are connected to ground. Page 60 Filepro CFP4207 Series... -
Page 69: Interface Timing Requirements
SCSI Physical Characteristics Chapter 5 Interface Timing Requirements Unless otherwise noted, the delay-time measurements are calculated from signal conditions existing at the drive's own SCSI bus connector. Normally these measurements (except cable skew delay) can be made without considering delays in the cable. -
Page 70: Model Cfp4207W (Wide, Unitized Scsi-3 P-Connector)
(SIPs) should be removed from the drive unless it is a SCSI device at a physical end of the bus. The terminator equivalent circuit is shown below for reference: Figure 5-2 Terminator Equivalent Circuit -DB0 -DB1 Voltage -DB2 TERMPWR Regulator 2.5K -REQ -I/O Page 62 Filepro CFP4207 Series... -
Page 71: J5 Auxiliary Connector Signal Characteristics
SCSI Physical Characteristics Chapter 5 J5 Auxiliary Connector Signal Characteristics Table 5-17 J5 Auxiliary Interface Electrical Characteristics State Current Voltage < 20 µA 2.5 V < V < V + 0.3 V High 0 < I 0 < I < -48 mA -0.1 V <... - Page 72 0.0156 + 0.0004 0.23 0.009 0.60 + 0.03 0.024 + 0.001 0.23 0.009 0.05 0.002 5.15 + 0.15 0.203 + 0.006 4.39 MAX 0.173 MAX 3.02 MIN 0.119 MIN 1.02 + 0.25 0.040 + 0.010 Page 64 Filepro CFP4207 Series...
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Page 73: Interface Pin Assignments
SCSI Physical Characteristics Chapter 5 Interface Pin Assignments The pin assignments for the interface connector are shown below: Table 5-19 Interface Signal Definitions Signal Signal Ground -DB(12) Ground -DB(13) Ground -DB(14) Ground -DB(15) Ground -DB(P1) Ground -DB(0) Ground -DB(1) Ground -DB(2) Ground -DB(3) -
Page 74: Interface Timing Requirements
30 ns 80 ns Transmit Setup Time 23 ns 23 ns Notes: 1 This time does not apply at the SCSI connector of the drive. 2 This is a recommended time. It is not mandatory. Page 66 Filepro CFP4207 Series... -
Page 75: Scsi Command Implementation
SCSI Command Implementation This section contains a brief summary of the SCSI Interface implemented in the drive. For additional details regarding command descriptions, please refer to the Eleventh Generation SCSI Interface Manual. SCSI Command Summary Following is a list of commands that the drive supports: Format Unit Inquiry Mode Select... -
Page 76: Format Drive Page - 03 H
Tracks Per Zone: Defines the number of tracks per zone to use in dividing the capacity of the drive for the purpose of allocating alternate sectors. A value of zero means that one zone is defined for the entire drive. Page 68 Filepro CFP4207 Series... -
Page 77: Technical Reference Manual
SCSI Physical Characteristics Chapter 6 Alternate Sectors Per Zone: Defines the number of spare sectors per zone the drive reserves for defect handling. Not supported. Must be set to zero. Alternate Tracks Per Logical Unit: Not supported. Must be set to zero. Sectors Per Track: Defines the number of physical sectors per track. - Page 78 Medium Rotation Rate (MSB) Medium Rotation Rate (LSB) 22-23 Reserved Only one copy of this page is maintained. There is only one changeable field, RPL. All other fields are described in the MODE SENSE Command. Page 70 Filepro CFP4207 Series...
- Page 79 SCSI Physical Characteristics Chapter 6 RPL (Rotational Position Locking): Enables spindle synchronization. Setting either bit 0 or 1, or both, causes multiple drives which have their spindle synchronization (SS) pins daisy chained together to synchronize their spindles. Notch and Partition Parameters Page - 0C The Notch and Partition Parameters Page contains information which pertains to each notch of the drive.
- Page 80 (03* Ending Boundary (FD* Ending Boundary (LSB) (00* Pages Notched (MSB) Pages Notched Pages Notched Pages Notched Pages Notched Pages Notched Pages Notched Pages Notched (LSB) * Zone 0, value varies depending on active notch. Page 72 Filepro CFP4207 Series...
- Page 81 SCSI Physical Characteristics Chapter 6 ND (Notched Drive): If set to zero, the drive is not notched and all other parameters in this page are returned as zeros. If set to one, the drive is notched and this page defines the starting and ending boundaries for each active notch. This parameter is always set to one.
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