IFND DEVICES_HARDBLOCKS_I DEVICES_HARDBLOCKS_I EQU 1 ** ** $Filename: devices/hardblocks.i $ ** $Release: 2.04 Includes, V37.4 $ ** $Revision: 36.3 $ ** $Date: 91/08/23 $ ** ** File System identifier blocks for hard disks ** ** (C) Copyright 1988-1991 Commodore-Amiga, Inc. ** All Rights Reserved ** IFND EXEC_TYPES_I INCLUDE "exec/types.i" ENDC ;--------------------------------------------------------------------- ; ; This file describes blocks of data that exist on a hard disk ; to describe that disk. They are not generically accessable to ; the user as they do not appear on any DOS drive. The blocks ; are tagged with a unique identifier, checksummed, and linked ; together. The root of these blocks is the RigidDiskBlock. ; ; The RigidDiskBlock must exist on the disk within the first ; RDB_LOCATION_LIMIT blocks. This inhibits the use of the zero ; cylinder in an AmigaDOS partition: although it is strictly ; possible to store the RigidDiskBlock data in the reserved ; area of a partition, this practice is discouraged since the ; reserved blocks of a partition are overwritten by "Format", ; "Install", "DiskCopy", etc. The recommended disk layout, ; then, is to use the first cylinder(s) to store all the drive ; data specified by these blocks: i.e. partition descriptions, ; file system load images, drive bad block maps, spare blocks, ; etc. ; ; Though only 512 byte blocks are currently supported by the ; file system, this proposal tries to be forward-looking by ; making the block size explicit, and by using only the first ; 256 bytes for all blocks but the LoadSeg data. ; ;--------------------------------------------------------------------- ; ; NOTE ; optional block addresses below contain $ffffffff to indicate ; a NULL address ; STRUCTURE RigidDiskBlock,0 ULONG rdb_ID ; 4 character identifier ULONG rdb_SummedLongs ; size of this checksummed structure LONG rdb_ChkSum ; block checksum (longword sum to zero) ULONG rdb_HostID ; SCSI Target ID of host ULONG rdb_BlockBytes ; size of disk blocks ULONG rdb_Flags ; see below for defines ; block list heads ULONG rdb_BadBlockList ; optional bad block list ULONG rdb_PartitionList ; optional first partition block ULONG rdb_FileSysHeaderList ; optional fule system header block ULONG rdb_DriveInit ; optional drive-specific init code ; DriveInit(lun,rdb,ior): "C" stk & d0/a0/a1 STRUCT rdb_Reserved1,6*4 ; set to $ffffffff ; physical drive characteristics ULONG rdb_Cylinders ; number of drive cylinders ULONG rdb_Sectors ; sectors per track ULONG rdb_Heads ; number of drive heads ULONG rdb_Interleave ; interleave ULONG rdb_Park ; landing zone cylinder STRUCT rdb_Reserved2,3*4 ULONG rdb_WritePreComp ; starting cylinder: write precompensation ULONG rdb_ReducedWrite ; starting cylinder: reduced write current ULONG rdb_StepRate ; drive step rate STRUCT rdb_Reserved3,5*4 ; logical drive characteristics ULONG rdb_RDBBlocksLo ; low block of range reserved for hardblocks ULONG rdb_RDBBlocksHi ; high block of range for these hardblocks ULONG rdb_LoCylinder ; low cylinder of partitionable disk area ULONG rdb_HiCylinder ; high cylinder of partitionable data area ULONG rdb_CylBlocks ; number of blocks available per cylinder ULONG rdb_AutoParkSeconds ; zero for no auto park ULONG rdb_HighRDSKBlock ; highest block used by RDSK ; (not including replacement bad blocks) STRUCT rdb_Reserved4,1*4 ; drive identification STRUCT rdb_DiskVendor,8 STRUCT rdb_DiskProduct,16 STRUCT rdb_DiskRevision,4 STRUCT rdb_ControllerVendor,8 STRUCT rdb_ControllerProduct,16 STRUCT rdb_ControllerRevision,4 STRUCT rdb_Reserved5,10*4 LABEL RigidDiskBlock_SIZEOF IDNAME_RIGIDDISK EQU (('R'<<24)!('D'<<16)!('S'<<8)!('K')) RDB_LOCATION_LIMIT EQU 16 BITDEF RDBF,LAST,0 ; no disks exist to be configured after ; this one on this controller BITDEF RDBF,LASTLUN,1 ; no LUNs exist to be configured greater ; than this one at this SCSI Target ID BITDEF RDBF,LASTTID,2 ; no Target IDs exist to be configured ; greater than this one on this SCSI bus BITDEF RDBF,NORESELECT,3 ; don't bother trying to perform reselection ; when talking to this drive BITDEF RDBF,DISKID,4 ; rdb_Disk... identification valid BITDEF RDBF,CTRLRID,5 ; rdb_Controller... identification valid ; added 7/20/89 by commodore: BITDEF RDBF,SYNCH,6 ; drive supports scsi synchronous mode ; CAN BE DANGEROUS TO USE IF IT DOESN'T! ;--------------------------------------------------------------------- STRUCTURE BadBlockEntry,0 ULONG bbe_BadBlock ; block number of bad block ULONG bbe_GoodBlock ; block number of replacement block LABEL BadBlockEntry_SIZEOF STRUCTURE BadBlockBlock,0 ULONG bbb_ID ; 4 character identifier ULONG bbb_SummedLongs ; size of this checksummed structure LONG bbb_ChkSum ; block checksum (longword sum to zero) ULONG bbb_HostID ; SCSI Target ID of host ULONG bbb_Next ; block number of the next BadBlockBlock ULONG bbb_Reserved STRUCT bbb_BlockPairs,61*BadBlockEntry_SIZEOF ; bad block entry pairs ; note 61 assumes 512 byte blocks ; there is no BadBlockBlock_SIZEOF: try rdb_BlockBytes IDNAME_BADBLOCK EQU (('B'<<24)!('A'<<16)!('D'<<8)!('B')) ;--------------------------------------------------------------------- STRUCTURE PartitionBlock,0 ULONG pb_ID ; 4 character identifier ULONG pb_SummedLongs ; size of this checksummed structure LONG pb_ChkSum ; block checksum (longword sum to zero) ULONG pb_HostID ; SCSI Target ID of host ULONG pb_Next ; block number of the next PartitionBlock ULONG pb_Flags ; see below for defines STRUCT pb_Reserved1,2*4 ULONG pb_DevFlags ; preferred flags for OpenDevice STRUCT pb_DriveName,32 ; preferred DOS device name: BSTR form ; (not used if this name is in use) STRUCT pb_Reserved2,15*4 ; filler to 32 longwords STRUCT pb_Environment,17*4 ; environment vector for this partition STRUCT pb_EReserved,15*4 ; reserved for future environment vector LABEL PartitionBlock_SIZEOF IDNAME_PARTITION EQU (('P'<<24)!('A'<<16)!('R'<<8)!('T')) BITDEF PBF,BOOTABLE,0 ; this partition is intended to be bootable ; (expected directories and files exist) BITDEF PBF,NOMOUNT,1 ; do not mount this partition (e.g. manually ; mounted, but space reserved here) ;--------------------------------------------------------------------- STRUCTURE FileSysHeaderBlock,0 ULONG fhb_ID ; 4 character identifier ULONG fhb_SummedLongs ; size of this checksummed structure LONG fhb_ChkSum ; block checksum (longword sum to zero) ULONG fhb_HostID ; SCSI Target ID of host ULONG fhb_Next ; block number of the next FileSysHeaderBlock ULONG fhb_Flags ; see below for defines STRUCT fhb_Reserved1,2*4 ULONG fhb_DosType ; file system description: match this with ; partition environment's DE_DOSTYPE entry ULONG fhb_Version ; release version of this code ULONG fhb_PatchFlags ; bits set for those of the following that ; need to be substituted into a standard ; device node for this file system: e.g. ; $180 to substitute SegList & GlobalVec ULONG fhb_Type ; device node type: zero ULONG fhb_Task ; standard dos "task" field: zero ULONG fhb_Lock ; not used for devices: zero ULONG fhb_Handler ; filename to loadseg: zero placeholder ULONG fhb_StackSize ; stacksize to use when starting task LONG fhb_Priority ; task priority when starting task LONG fhb_Startup ; startup msg: zero placeholder LONG fhb_SegListBlocks ; first of linked list of LoadSegBlocks: ; note that this entry requires some ; processing before substitution LONG fhb_GlobalVec ; BCPL global vector when starting task STRUCT fhb_Reserved2,23*4 ; (those reserved by PatchFlags) STRUCT fhb_Reserved3,21*4 LABEL FileSysHeader_SIZEOF IDNAME_FILESYSHEADER EQU (('F'<<24)!('S'<<16)!('H'<<8)!('D')) ;--------------------------------------------------------------------- STRUCTURE LoadSegBlock,0 ULONG lsb_ID ; 4 character identifier ULONG lsb_SummedLongs ; size of this checksummed structure LONG lsb_ChkSum ; block checksum (longword sum to zero) ULONG lsb_HostID ; SCSI Target ID of host ULONG lsb_Next ; block number of the next FileSysBlock STRUCT lsb_LoadData,123*4 ; data for "loadseg" ; note 123 assumes 512 byte blocks ; there is no LoadSegBlock_SIZEOF: try rdb_BlockBytes IDNAME_LOADSEG EQU (('L'<<24)!('S'<<16)!('E'<<8)!('G')) ENDC