Unit SCSI

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Description

Ultibo SCSI Interface unit

The SCSI interface unit is device non specific in that it implements only the SCSI protocol.

Actual command transfer is performed by a device specific driver that implements the exact semantics of the device. eg USB Mass Storage devices use the SCSI protocol, the SCSI interface implements the protocol behaviour but the actual command transfer is handled by the USB storage driver.

Constants


SCSI specific constants SCSI_*
SCSI_NAME_PREFIX = 'SCSI'; Name prefix for SCSI Devices
SCSI_HOST_PREFIX = 'SCSIHost'; Name prefix for Host Devices


SCSI device type SCSI_TYPE_*
SCSI_TYPE_NONE = 0;  
SCSI_TYPE_HDD = 1;  


SCSI device state SCSI_STATE_*
SCSI_STATE_EJECTED = 0;  
SCSI_STATE_INSERTED = 1;  


SCSI device flag SCSI_FLAG_*
SCSI_FLAG_NONE = $00000000;  


SCSI protocol message SCSI_MESSAGE_*
SCSI_MESSAGE_COMPLETE = $00;  
SCSI_MESSAGE_EXTENDED = $01;  
SCSI_MESSAGE_SAVE_DP = $02;  
SCSI_MESSAGE_RESTORE_DP = $03;  
SCSI_MESSAGE_DISCONNECT = $04;  
SCSI_MESSAGE_ID_ERROR = $05;  
SCSI_MESSAGE_ABORT = $06;  
SCSI_MESSAGE_REJECT = $07;  
SCSI_MESSAGE_NOOP = $08;  
SCSI_MESSAGE_PARITY = $09;  
SCSI_MESSAGE_LCOMPLETE = $0a;  
SCSI_MESSAGE_FCOMPLETE = $0b;  
SCSI_MESSAGE_RESET = $0c;  
SCSI_MESSAGE_ABORT_TAG = $0d;  
SCSI_MESSAGE_CLEAR_QUEUE = $0e;  
SCSI_MESSAGE_INIT_REC = $0f;  
SCSI_MESSAGE_REL_REC = $10;  
SCSI_MESSAGE_TERMINATE = $11;  
SCSI_MESSAGE_SIMPLE_TAG = $20;  
SCSI_MESSAGE_HEAD_TAG = $21;  
SCSI_MESSAGE_ORDERED_TAG = $22;  
SCSI_MESSAGE_IGN_RESIDUE = $23;  
SCSI_MESSAGE_IDENTIFY = $80;  
 
SCSI_MESSAGE_X_MODIFY_DP = $00;  
SCSI_MESSAGE_X_SYNC_REQ = $01;  
SCSI_MESSAGE_X_WIDE_REQ = $03;  
SCSI_MESSAGE_X_PPR_REQ = $04;  


SCSI protocol status SCSI_STATUS_*
SCSI_STATUS_GOOD = $00;  
SCSI_STATUS_CHECK_COND = $02;  
SCSI_STATUS_COND_MET = $04;  
SCSI_STATUS_BUSY = $08;  
SCSI_STATUS_INT = $10;  
SCSI_STATUS_INT_COND_MET = $14;  
SCSI_STATUS_CONFLICT = $18;  
SCSI_STATUS_TERMINATED = $20;  
SCSI_STATUS_QUEUE_FULL = $28;  
SCSI_STATUS_ILLEGAL = $ff;  
SCSI_STATUS_SENSE = $80;  


SCSI protocol sense key SCSI_SENSE_*
SCSI_SENSE_NO_SENSE = $00;  
SCSI_SENSE_RECOVERED_ERROR = $01;  
SCSI_SENSE_NOT_READY = $02;  
SCSI_SENSE_MEDIUM_ERROR = $03;  
SCSI_SENSE_HARDWARE_ERROR = $04;  
SCSI_SENSE_ILLEGAL_REQUEST = $05;  
SCSI_SENSE_UNIT_ATTENTION = $06;  
SCSI_SENSE_DATA_PROTECT = $07;  
SCSI_SENSE_BLANK_CHECK = $08;  
SCSI_SENSE_VENDOR_SPECIFIC = $09;  
SCSI_SENSE_COPY_ABORTED = $0A;  
SCSI_SENSE_ABORTED_COMMAND = $0B;  
SCSI_SENSE_VOLUME_OVERFLOW = $0D;  
SCSI_SENSE_MISCOMPARE = $0E;  


SCSI protocol additional sense code SCSI_ASC_*
SCSI_ASC_NO_SENSE = $00; NO SENSE
SCSI_ASC_RECOVERED_RETRIES = $17; RECOVERED DATA WITH RETRIES
SCSI_ASC_RECOVERED_ECC = $18; RECOVERED DATA WITH ECC
SCSI_ASC_NOT_READY_LUN = $04; LOGICAL UNIT NOT READY
SCSI_ASC_NOT_READY_NO_REF_POS = $06; NO REFERENCE POSITION FOUND
SCSI_ASC_NOT_READY_LUN_COMM = $08; LOGICAL UNIT COMMUNICATION
SCSI_ASC_NOT_READY_MEDIUM_NOT_PRESENT = $3A; MEDIUM NOT PRESENT


SCSI protocol additional sense code qualifier SCSI_ASCQ_*
SCSI_ASCQ_NO_SENSE = $00; NO SENSE
SCSI_ASCQ_RECOVERED_RETRIES = $01; RECOVERED DATA WITH RETRIES
SCSI_ASCQ_RECOVERED_ECC = $00; RECOVERED DATA WITH ECC
SCSI_ASCQ_NOT_READY_LUN_BECOME_READY = $01; LOGICAL DRIVE NOT READY - BECOMING READY
SCSI_ASCQ_NOT_READY_LUN_INIT_REQUIRED = $02; LOGICAL DRIVE NOT READY - INITIALIZATION REQUIRED
SCSI_ASCQ_NOT_READY_LUN_FORMAT_PROGRESS = $04; LOGICAL UNIT NOT READY - FORMAT IN PROGRESS
SCSI_ASCQ_NOT_READY_LUN_DEVICE_BUSY = $FF; LOGICAL DRIVE NOT READY - DEVICE IS BUSY
SCSI_ASCQ_NOT_READY_LUN_COMM_FAILURE = $00; LOGICAL UNIT COMMUNICATION FAILURE
SCSI_ASCQ_NOT_READY_LUN_COMM_TIMEOUT = $01; LOGICAL UNIT COMMUNICATION TIME-OUT
SCSI_ASCQ_NOT_READY_LUN_COMM_OVERRUN = $80; LOGICAL UNIT COMMUNICATION OVERRUN


SCSI protocol command SCSI_COMMAND_*
SCSI_COMMAND_CHANGE_DEF = $40; Change Definition (Optional)
SCSI_COMMAND_COMPARE = $39; Compare (Optional)
SCSI_COMMAND_COPY = $18; Copy (Optional)
SCSI_COMMAND_COP_VERIFY = $3A; Copy and Verify (Optional)
SCSI_COMMAND_INQUIRY = $12; Inquiry (MANDATORY)
SCSI_COMMAND_LOG_SELECT = $4C; Log Select (Optional)
SCSI_COMMAND_LOG_SENSE = $4D; Log Sense (Optional)
SCSI_COMMAND_MODE_SEL6 = $15; Mode Select 6-byte (Device Specific)
SCSI_COMMAND_MODE_SEL10 = $55; Mode Select 10-byte (Device Specific)
SCSI_COMMAND_MODE_SEN6 = $1A; Mode Sense 6-byte (Device Specific)
SCSI_COMMAND_MODE_SEN10 = $5A; Mode Sense 10-byte (Device Specific)
SCSI_COMMAND_READ_BUFF = $3C; Read Buffer (Optional)
SCSI_COMMAND_REQ_SENSE = $03; Request Sense (MANDATORY)
SCSI_COMMAND_SEND_DIAG = $1D; Send Diagnostic (Optional)
SCSI_COMMAND_TST_U_RDY = $00; Test Unit Ready (MANDATORY)
SCSI_COMMAND_WRITE_BUFF = $3B; Write Buffer (Optional)
 
Commands Unique to Direct Access Devices
SCSI_COMMAND_COMPARE = $39; Compare (Optional)
SCSI_COMMAND_FORMAT = $04; Format Unit (MANDATORY)
SCSI_COMMAND_LCK_UN_CAC = $36; Lock Unlock Cache (Optional)
SCSI_COMMAND_PREFETCH = $34; Prefetch (Optional)
SCSI_COMMAND_MED_REMOVL = $1E; Prevent/Allow medium Removal (Optional)
SCSI_COMMAND_READ6 = $08; Read 6-byte (MANDATORY)
SCSI_COMMAND_READ10 = $28; Read 10-byte (MANDATORY)
SCSI_COMMAND_READ12 = $A8; Read 12-byte (Optional)
SCSI_COMMAND_READ16 = $88; Read 16-byte (Optional)
SCSI_COMMAND_RD_CAPAC = $25; Read Capacity (MANDATORY)
SCSI_COMMAND_RD_CAPAC10 = SCSI_COMMAND_RD_CAPAC; Read Capacity (10)
SCSI_COMMAND_RD_DEFECT = $37; Read Defect Data (Optional)
SCSI_COMMAND_READ_LONG = $3E; Read Long (Optional)
SCSI_COMMAND_REASS_BLK = $07; Reassign Blocks (Optional)
SCSI_COMMAND_RCV_DIAG = $1C; Receive Diagnostic Results (Optional)
SCSI_COMMAND_RELEASE = $17; Release Unit (MANDATORY)
SCSI_COMMAND_REZERO = $01; Rezero Unit (Optional)
SCSI_COMMAND_SRCH_DAT_E = $31; Search Data Equal (Optional)
SCSI_COMMAND_SRCH_DAT_H = $30; Search Data High (Optional)
SCSI_COMMAND_SRCH_DAT_L = $32; Search Data Low (Optional)
SCSI_COMMAND_SEEK6 = $0B; Seek 6-Byte (Optional)
SCSI_COMMAND_SEEK10 = $2B; Seek 10-Byte (Optional)
SCSI_COMMAND_SEND_DIAG = $1D; Send Diagnostics (MANDATORY)
SCSI_COMMAND_SET_LIMIT = $33; Set Limits (Optional)
SCSI_COMMAND_START_STP = $1B; Start/Stop Unit (Optional)
SCSI_COMMAND_SYNC_CACHE = $35; Synchronize Cache (Optional)
SCSI_COMMAND_VERIFY = $2F; Verify (Optional)
SCSI_COMMAND_WRITE6 = $0A; Write 6-Byte (MANDATORY)
SCSI_COMMAND_WRITE10 = $2A; Write 10-Byte (MANDATORY)
SCSI_COMMAND_WRITE12 = $AA; Write 12-Byte (Optional)
SCSI_COMMAND_WRITE16 = $8A; Write 16-Byte (Optional)
SCSI_COMMAND_WRT_VERIFY = $2E; Write and Verify (Optional)
SCSI_COMMAND_WRITE_LONG = $3F; Write Long (Optional)
SCSI_COMMAND_WRITE_SAME = $41; Write Same (Optional)
SCSI_COMMAND_RD_FMT_CAP = $23; Read Format Capacities
SCSI_COMMAND_SVC_ACT_IN = $9E; Service Action In


SCSI command data SCSI_COMMAND_MAX_*
SCSI_COMMAND_MAX_SIZE = 16;  


SCSI service action SCSI_SAI_*
SCSI_SAI_READ_CAPACITY_16 = $10; Read Capacity (16)
SCSI_SAI_GET_LBA_STATUS = $12; Get LBA Status


SCSI inquiry data SCSI_INQUIRY_*
SCSI_INQUIRY_STANDARD = $00;  


SCSI standard inquiry data SCSI_STANDARD_INQUIRY_*
SCSI_STANDARD_INQUIRY_SIZE = 36;  


SCSI inquiry peripheral device type SCSI_DEVICE_TYPE_*
SCSI_DEVICE_TYPE_DISK = $00; SBC-3 - Direct access block device (e.g., magnetic disk)
SCSI_DEVICE_TYPE_TAPE = $01; SSC-3 - Sequential-access device (e.g., magnetic tape)
SCSI_DEVICE_TYPE_PRINTER = $02; SSC - Printer device
SCSI_DEVICE_TYPE_PROCESSOR = $03; SPC-2 - Processor device
SCSI_DEVICE_TYPE_WRITE_ONCE = $04; SBC - Write-once device (e.g., some optical disks)
SCSI_DEVICE_TYPE_CD_DVD = $05; MMC-5 - CD/DVD device
SCSI_DEVICE_TYPE_SCANNER = $06; Scanner device (obsolete)
SCSI_DEVICE_TYPE_OPTICAL = $07; SBC - Optical memory device (e.g., some optical disks)
SCSI_DEVICE_TYPE_CHANGER = $08; SMC-3 - Medium changer device (e.g., jukeboxes)
SCSI_DEVICE_TYPE_COMMS = $09; Communications device (obsolete)
SCSI_DEVICE_TYPE_ARRAY = $0C; SCC-2 - Storage array controller device (e.g., RAID)
SCSI_DEVICE_TYPE_ENCLOSURE = $0D; SES - Enclosure services device
SCSI_DEVICE_TYPE_RBC = $0E; RBC - Simplified direct-access device (e.g., magnetic disk)
SCSI_DEVICE_TYPE_CARD = $0F; OCRW - Optical card reader/writer device
SCSI_DEVICE_TYPE_BRIDGE = $10; BCC - Bridge Controller Commands
SCSI_DEVICE_TYPE_OBJECT = $11; OSD - Object-based Storage Device
SCSI_DEVICE_TYPE_AUTOMATION = $12; ADC-2 - Automation/Drive Interface
SCSI_DEVICE_TYPE_WELL_KNOWN = $1E; Well known logical unit
SCSI_DEVICE_TYPE_UNKNOWN = $1F; Unknown or no device type


SCSI inquiry removable media bit SCSI_REMOVABLE_MEDIA_*
SCSI_REMOVABLE_MEDIA_BIT = $80;  


SCSI request sense data SCSI_REQUEST_SENSE_*
SCSI_REQUEST_SENSE_SIZE = 18;  


SCSI read capacity data SCSI_READ_CAPACITY_*
SCSI_READ_CAPACITY_SIZE = 8;  
SCSI_READ_CAPACITY_16_SIZE = 32;  


SCSI read 10 data SCSI_READ_10_*
SCSI_READ_10_MAX_BLOCKS = $FFFF;  


SCSI write 10 data SCSI_WRITE_10_*
SCSI_WRITE_10_MAX_BLOCKS = $FFFF;  


SCSI logging SCSI_LOG_*
SCSI_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG; SCSI debugging messages
SCSI_LOG_LEVEL_INFO = LOG_LEVEL_INFO; SCSI informational messages, such as a device being attached or detached
SCSI_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR; SCSI error messages
SCSI_LOG_LEVEL_WARN = LOG_LEVEL_WARN; SCSI warning messages
SCSI_LOG_LEVEL_NONE = LOG_LEVEL_NONE; No SCSI messages


Type definitions


SCSI host enumeration callback

TSCSIHostEnumerate = function(Host:PSCSIHost; Data:Pointer):LongWord;

SCSI host

PSCSIHost = ^TSCSIHost;

TSCSIHost = record

Device Properties
Device:TDevice; The Device entry for this Host
Host Properties
HostId:LongWord; Unique Id of this Host in the Host table
HostState:LongWord; Host state (eg ?????)
Statistics Properties
 
Driver Properties
Lock:TMutexHandle; Host lock
Internal Properties
Prev:PSCSIHost; Previous entry in Host table
Next:PSCSIHost; Next entry in Host table

SCSI enumeration callback

TSCSIEnumerate = function(SCSI:PSCSIDevice; Data:Pointer):LongWord;

SCSI notification callback

TSCSINotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;

SCSI device

PSCSIDevice = ^TSCSIDevice;

TSCSIDevice = record

Device Properties
Device:TDevice; The Device entry for this SCSI
SCSI Properties
SCSIId:LongWord; Unique Id of this SCSI in the SCSI table
SCSIState:LongWord; SCSI state (eg SCSI_STATE_INSERTED)
Statistics Properties
 
Driver Properties
Lock:TMutexHandle; Device lock
Vendor:PChar; SCSI Vendor
Product:PChar; SCSI Product
Revision:PChar; Firmware Revision
Internal Properties
Prev:PSCSIDevice; Previous entry in SCSI table
Next:PSCSIDevice; Next entry in SCSI table

SCSI command block

PSCSICommandBlock = ^TSCSICommandBlock;

TSCSICommandBlock = record

Command:array[0..SCSI_COMMAND_MAX_SIZE - 1] of Byte; Command
SenseData:array[0..63] of Byte; Request Sense
Status:Byte; SCSI Status
TargetID:Byte; Target ID
TargetLUN:Byte; Target LUN
CommandLength:Byte; Command Length
DataLength:LongWord; Total Data Length
Data:Pointer; Pointer to Data
MessageOut:array[0..11] of Byte; Message out buffer
MessageIn:array[0..11] of Byte; Message in buffer
SenseCommandLength:Byte; Sense Command Length
SenseDataLength:LongWord; Sense Data Length
SenseCommand:array[0..5] of Byte; Sense Command
ControllerStatus:LongWord; Controller Status
TransferredBytes:LongWord; Transferred Bytes

SCSI standard inquiry data

PSCSIStandardInquiryData = ^TSCSIStandardInquiryData;

TSCSIStandardInquiryData = packed record

DeviceType:Byte; Peripheral Device Type (Bits 4..0)
RemovableMediaBit:Byte; Removable Media Bit (Bit 7) ($80)
Version:Byte; ISO/ECMA/ANSI Version (ISO Bits 7..6)(ECMA Bits 5..3)(ANSI Bits 2..0)
ResponseFormat:Byte; Response Data Format (Bits 3..0)
AdditionalLength:Byte; Additional Length
Reserved1:Byte;  
Reserved2:Word;  
Vendor:array[0..7] of Char; Vendor Information
Product:array[0..15] of Char; Product Identification
Revision:array[0..3] of Char; Product Revision Level

SCSI request sense data

PSCSIRequestSenseData = ^TSCSIRequestSenseData;

TSCSIRequestSenseData = packed record

ErrorCode:Byte; Error Code (Bits 6..0) (Bit 7 is Valid bit)
Reserved1:Byte;  
SenseKey:Byte; Sense Key (Bits 3..0)
Information:LongWord; Information
AdditionalLength:Byte; Additional Sense Length
Reserved2:LongWord;  
ASC:Byte; Additional Sense Code
ASCQ:Byte; Additional Sense Code Qualifier
Reserved3:LongWord;  

SCSI read capacity data

PSCSIReadCapacityData = ^TSCSIReadCapacityData;

TSCSIReadCapacityData = packed record

LastBlock:LongWord; Last Logical Block Address (Big Endian)
BlockSize:LongWord; Block Length In Bytes (Big Endian)

SCSI read capacity 16 data

PSCSIReadCapacity16Data = ^TSCSIReadCapacity16Data;

TSCSIReadCapacity16Data = packed record

LastBlock:Int64; Last Logical Block Address (Big Endian)
BlockSize:LongWord; Block Length In Bytes (Big Endian)
Reserved1:Byte; P_TYPE (Bits 3..1) PROT_EN (Bit 0)
Reserved2:Byte; P_I_EXPONENT (Bitss 7..4) LOGICAL BLOCKS PER PHYSICAL BLOCK EXPONENT (Bits 3..0
Reserved3:Byte; TPE (Bit 7) TPRZ (Bit 6) LOWEST ALIGNED LOGICAL BLOCK ADDRESS (Bits 5..0)(Big Endian)
Reserved4:Byte; LOWEST ALIGNED LOGICAL BLOCK ADDRESS (Bits 7..0)(Big Endian)
Reserved5:array[0..15] of Byte;  


Public variables


SCSI logging

SCSI_DEFAULT_LOG_LEVEL:LongWord = SCSI_LOG_LEVEL_DEBUG; Minimum level for SCSI messages. Only messages with level greater than or equal to this will be printed.
SCSI_LOG_ENABLED:Boolean;


Function declarations


Initialization functions 

procedure SCSIInit;
Description: To be documented
Note None documented


SCSI functions 

function SCSIDeviceInquiry(SCSI:PSCSIDevice; var DeviceType,DeviceFlags:LongWord; var Vendor,Product,Revision:PChar):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceRequestSense(SCSI:PSCSIDevice; var SenseKey,ASC,ASCQ:Byte):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceReadCapacity(SCSI:PSCSIDevice; var BlockSize,BlockShift:LongWord; var BlockCount:Int64):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceTestUnitReady(SCSI:PSCSIDevice; var DeviceFlags:LongWord):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceRead10(SCSI:PSCSIDevice; Start:LongWord; Count:Word; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceWrite10(SCSI:PSCSIDevice; Start:LongWord; Count:Word; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceRead16(SCSI:PSCSIDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceWrite16(SCSI:PSCSIDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceTransport(SCSI:PSCSIDevice; Command:PSCSICommandBlock):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceCreate:PSCSIDevice;
Description: Create a new SCSI entry
Return Pointer to new SCSI entry or nil if SCSI could not be created 


function SCSIDeviceCreateEx(Size:LongWord):PSCSIDevice;
Description: Create a new SCSI entry
Size Size in bytes to allocate for new SCSI (Including the SCSI entry)
Return Pointer to new SCSI entry or nil if SCSI could not be created 


function SCSIDeviceDestroy(SCSI:PSCSIDevice):LongWord;
Description: Destroy an existing SCSI entry
Note None documented 


function SCSIDeviceRegister(SCSI:PSCSIDevice):LongWord;
Description: Register a new SCSI in the SCSI table
Note None documented 


function SCSIDeviceDeregister(SCSI:PSCSIDevice):LongWord;
Description: Deregister a SCSI from the SCSI table
Note None documented 


function SCSIDeviceFind(SCSIId:LongWord):PSCSIDevice;
Description: To be documented
Note None documented 


function SCSIDeviceFindByName(const Name:String):PSCSIDevice; inline;
Description: To be documented
Note None documented 


function SCSIDeviceFindByDescription(const Description:String):PSCSIDevice; inline;
Description: To be documented
Note None documented 


function SCSIDeviceEnumerate(Callback:TSCSIEnumerate; Data:Pointer):LongWord;
Description: To be documented
Note None documented 


function SCSIDeviceNotification(SCSI:PSCSIDevice; Callback:TSCSINotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented
Note None documented 


function SCSIHostCreate:PSCSIHost;
Description: Create a new Host entry
Return Pointer to new Host entry or nil if host could not be created 


function SCSIHostCreateEx(Size:LongWord):PSCSIHost;
Description: Create a new Host entry
Size Size in bytes to allocate for new host (Including the host entry)
Return Pointer to new Host entry or nil if host could not be created 


function SCSIHostDestroy(Host:PSCSIHost):LongWord;
Description: Destroy an existing Host entry
Note None documented 


function SCSIHostRegister(Host:PSCSIHost):LongWord;
Description: Register a new Host in the Host table
Note None documented 


function SCSIHostDeregister(Host:PSCSIHost):LongWord;
Description: Deregister a Host from the Host table
Note None documented 


function SCSIHostFind(HostId:LongWord):PSCSIHost;
Description: To be documented
Note None documented 


function SCSIHostEnumerate(Callback:TSCSIHostEnumerate; Data:Pointer):LongWord;
Description: To be documented
Note None documented


SCSI helper functions 

function SCSIGetCount:LongWord;
Description: Get the current SCSI count
Note None documented 


function SCSIDeviceCheck(SCSI:PSCSIDevice):PSCSIDevice;
Description: Check if the supplied SCSI is in the SCSI table
Note None documented 


procedure SCSILog(Level:LongWord; SCSI:PSCSIDevice; const AText:String);
Description: To be documented
Note None documented 


procedure SCSILogInfo(SCSI:PSCSIDevice; const AText:String); inline;
Description: To be documented
Note None documented 


procedure SCSILogWarn(SCSI:PSCSIDevice; const AText:String); inline;
Description: To be documented
Note None documented 


procedure SCSILogError(SCSI:PSCSIDevice; const AText:String); inline;
Description: To be documented
Note None documented 


procedure SCSILogDebug(SCSI:PSCSIDevice; const AText:String); inline;
Description: To be documented
Note None documented 


function SCSIDeviceTypeToStorageType(DeviceType:Byte; Removable,Floppy:Boolean):LongWord;
Description: To be documented
Note None documented 


function SCSIHostGetCount:LongWord;
Description: Get the current Host count
Note None documented 


function SCSIHostCheck(Host:PSCSIHost):PSCSIHost;
Description: Check if the supplied Host is in the host table
Note None documented


SCSI storage functions 

function SCSIStorageDeviceRead(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function SCSIStorageDeviceWrite(Storage:PStorageDevice; const Start,Count:Int64; Buffer:Pointer):LongWord;
Description: To be documented
Note None documented 


function SCSIStorageDeviceControl(Storage:PStorageDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;
Description: To be documented
Note None documented


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