Maxtor 91536D6, 91024D4, 90750D3, 91280D5, 91792D7, 92048D8 Initialization Commands, Identify Drive

Page 57

INTERFACE COMMANDS

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 the sector buffer. Parameter words in the buffer follow. Note that all reserved bits or words should be zeroes.

WORD	CONTENT DESCRIPTION
0	General configuration
	15 = device (0 = ATA, 1 = ATAPI)
	14-8 = not used
	7, 1 = removable media data
	6, 1 = not removable controller and/or device
	5-1 = reserved
	0
1	Number of cylinders
2	Reserved
3	Number of logical heads
4-5	Not used
6	Number of logical sectors per track
7-9	Not used
10 - 19	Drive serial number (40 ASCII characters)
20	Not used
21	Buffer size in 512 byte increments (0000h = not specified)
22	Number of Maxtor specific bytes available on Read/Write Long commands
23 - 26	Firmware revision (8 ASCII characters)
27 - 46	Model number (40 ASCII characters)
47	Maximum number of sectors that can be transferred per interrupt on read and write multiple commands
48	Reserved
49	Capabilities
	15 - 14 = reserved
	13 = standby timer (1 = values as specified in this standard are supported, 0 = values are Maxtor specific)
	12 = reserved (advanced PIO mode support)
	11, 1 = IORDY supported, 0 = IORDY may be supported
	10, 1 = IORDY can be disabled
	9-8 = reserved
	7-0 = not used

7 – 9

Image 57

Contents HA RD Drive Produc T MA Nual DiamondMax Plus Revisions Manual No U T I O N Before You BeginContents Handling and Installation Product SpecificationsHost Software Interface AT Interface DescriptionInterface Commands Service and SupportGlossary Figures Maxtor Corporation IntroductionManual Organization AbbreviationsConventions Signal ConventionsKey Words NumberingProduct Description DiamondMax Plus 5120 Key FeaturesFunctional / Interface Product FeaturesLogical Block Addressing On-the-Fly Hardware Error Correction Code ECCDefect Management Zone DMZ Software ECC CorrectionCache Management Read-Ahead ModeBuffer Segmentation Automatic Write Reallocation AWRMajor HDA Components Jumper Location/Configuration Subsystem ConfigurationCylinder Limitation Dual Drive SupportDrive Configuration Product SpecificationsPerformance Specifications Models and CapacitiesParameter Standard Metric Physical DimensionsPower Mode Definitions Power RequirementsEPA Energy Star Compliance Environmental LimitsShock and Vibration Reliability SpecificationsSafety Regulatory Compliance Radiated Electromagnetic Field Emissions EMC ComplianceCanadian Emissions Statement Hard Drive Handling Precautions Handling and InstallationPre-formatted Drive Important NoticeMulti-pack Shipping Container Unpacking and InspectionPhysical Installation Recommended Mounting ConfigurationRepacking Before You Begin General Requirements Mounting Drive in System Attaching Interface Power Cables System Setup Hard Drive Preparation System Hangs During Boot Signal Interface ConnectorAT Interface Description Pin Description SummaryPin Description Table PIN Name Signal Name Signal DescriptionPIO Timing Timing Parameters ModeDMA Timing Timing Parameters all times in nanoseconds Ultra DMA TimingSustained Ultra DMA Data In Burst Device Terminating an Ultra DMA Data In Burst Initiating an Ultra DMA Data Out Burst Device Pausing an Ultra DMA Data Out Burst Device Terminating an Ultra DMA Data Out Burst Features Register Error RegisterHost Software Interface Task File RegistersSector Number Register Sector Count RegisterCylinder Number Registers Device/Head RegisterCommand Register Summary Command Name Command Code Parameters Used SDHAlternate Status Register Control Diagnostic RegistersDevice Control Register Digital Input RegisterReset and Interrupt Handling Reset HandlingInterrupt Handling Set Feature Commands Interface CommandsRead Commands Read SectorsRead Verify Sectors Read Multiple Read DMASet Multiple Mode Write CommandsWrite Sectors Write Verify SectorsWrite DMA Write MultipleSet Features Mode Set Feature CommandsPower Mode Commands Sleep Mode Identify Drive Initialization Commands15-8 = PIO data transfer mode = Write Cache enabled Initialize Drive Parameters Seek, Format and Diagnostic Commands Execute Drive DiagnosticFormat Track Execute S.M.A.R.T A.R.T. Command SetService Policy Service and SupportNo Quibble Service SupportMaxFax Service Customer ServiceInternet Glossary Direct Memory Access Direct AccessError Correction Code ECC Error FreeHead Disk Assembly HDA Hard ErrorFile Allocation Table FAT Flux Changes PER InchLogical Address Phase Locked Loop PLLLogical Block Addressing Logical SectorRead Gate Signal Random Access Memory RAMRecoverable Error Sector Pulse SignalUnrecoverable Error UN-CORRECTABLE ErrorWrite Gate Signal THIN-FILM Media