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     dpt — DPT RAID Controller SCSI driver


     To compile this driver into the kernel, place the following lines in your kernel
     configuration file:

           device scbus
           device dpt

           For one or more PCI cards:
           device pci

           To allow PCI adapters to use memory mapped I/O if enabled:
           options DPT_ALLOW_MEMIO

     Alternatively, to load the driver as a module at boot time, place the following line in



     The dpt driver supports DPT RAID SCSI controllers.

     SmartRAID (PM3???) are "Enterprise" class cards, and SmartCache (PM2???) cards are in the
     "Workstation" class.  The Gen 4 Smart Cache IV products were a re-issue of the Gen 3
     utilizing upgraded (and cheaper to produce) silicon.  The PM3334 (Smart RAID III) was not
     revamped as there was no upgraded silicon (68040 processor) and it was using the best DPT
     made.  Note there has been customer confusion over the faster enterprise class card
     supported by this driver being an older generation.  The Gen5 cards are supported by the
     asr(4) driver.


     The dpt driver provides support for the following RAID adapters:

        DPT Smart Cache Plus
        Smart Cache II (PM2?2?, PM2024/PM2124 [PCI]) (Gen2)
        Smart RAID II (PM3?2?, PM3021, PM3222)
        Smart Cache III (PM2?3?)
        Smart RAID III (PM3?3?, PM3334UW [PCI]) (Gen3)
        Smart Cache IV (PM2?4?, PM2044/PM2144 [PCI]) (Gen4)
        Smart RAID IV


     asr(4), cd(4), ch(4), da(4), sa(4), scsi(4)


     The dpt driver first appeared in FreeBSD 2.2.6.


     The dpt driver was written by Simon Shapiro and ported to the CAM SCSI system by Justin T.