I dug this out from an old archive of mine.
Add a file in Devs/DOSDrivers with this content:
/* mountlist for ez135 with amiga format */
Device = omniscsi.device
FileSystem = L:FastFileSystem
Unit = 5
Flags = 0
Surfaces = 1
BlocksPerTrack = 64
Reserved = 2
Interleave = 0
LowCyl = 1
HighCyl = 4095
Buffers = 32
GlobVec = -1
BufMemType = 4
Mask = 0xfffffffe
MaxTransfer = 0x7fffffff
Mount = 1
DosType = 0x444f5301
StackSize = 4000
#
Change the device line to suit your SCSI device and the unit number to be the same as the number on the back of your EZ135.
It worked for me.
