What you need is :
Cd filesystem, like CacheCDFS or AmiCDFS, etc. to system:l folder
Correct device name, like IVS_SCSIpro.device
Unit number, easy way to get it is a sysinfo, chech devices from it. This is a susual problem.
CD0 or what ever number you want it to have on system:devs/dosdrivers
CD0 is a mount file it has a all device information, like this ->
/***************************************************************/
/* CacheCDFS mountlist entry © 1993 Elaborate Bytes, O. Kastl */
/***************************************************************/
FileSystem = L:CacheCDFS /* The name of the game */
Device = "scsi.device" /* Name of exec device driver */
Unit = 0 /* exec device unit */
Flags = 0 /* OpenDevice flags */
BlocksPerTrack = 351000 /* Unused */
BlockSize = 2048 /* True, but unused */
Mask = 0x7ffffffe /* Memory mask for direct read */
MaxTransfer = 0x1000000 /* Maximum amount of bytes for direct read */
Reserved = 0 /* Unused */
Interleave = 0 /* Unused */
LowCyl = 0 /* Unused */
HighCyl = 0 /* Unused */
Surfaces = 1 /* Unused */
Buffers = 50 /* Number of cache lines */
BufMemType = 513 /* MEMF_PUBLIC|MEMF_24BITDMA */
BootPri = 2 /* Boot priority for MountCD */
GlobVec = -1 /* Do not change! */
Mount = 1 /* Mount it immediately */
Priority = 10 /* Priority of FileSystem task */
DosType = 0x43443031 /* Currently unused */
StackSize = 3000 /* Minimum stack required is 3000! */
Control = "MD=0 LC=1 DC=8 S L LV AL LFC=1 HR=.rsrc MSDOS MV"
/* The Control field is for special adjustments */
/* L/S convert all file/volume names to lowercase */
/* LV/S convert volume names to lowercase */
/* AL/S Auto-Lower converts only non-Amiga CDs */
/* LFC/N start converting at this character */
/* LC/N/A number of blocks per cache line */
/* DC/N/A number of cache lines for the data cache */
/* MD/N/A number of blocks, when starting direct read, not using */
/* the cache. 0 will be a reasonable default (LC*DC+1) */
/* S/S Do SCSI direct commands, no Trackdisk like commands! */
/* NC/S Do NOT use TD_ADDCHANGEINT, poll for DiskChange! */
/* M/S Issue a TD_MOTOR (OFF) command after read */