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NAME

     dpt -- DPT RAID Controller SCSI driver

SYNOPSIS

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

           device scbus
           device dpt

           For one or more EISA cards:
           device eisa

           For one or more ISA cards:
           device isa

           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 loader.conf(5):

           dpt_load="YES"

DESCRIPTION

     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.

HARDWARE

     The dpt driver provides support for the following RAID adapters:

     +o   DPT Smart Cache Plus
     +o   Smart Cache II (PM2?2?, PM2022 [EISA], PM2024/PM2124 [PCI]) (Gen2)
     +o   Smart RAID II (PM3?2?, PM3021, PM3222)
     +o   Smart Cache III (PM2?3?)
     +o   Smart RAID III (PM3?3?, PM3332 [EISA], PM3334UW [PCI]) (Gen3)
     +o   Smart Cache IV (PM2?4?, PM2042 [EISA], PM2044/PM2144 [PCI]) (Gen4)
     +o   Smart RAID IV

SEE ALSO

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

HISTORY

     The dpt driver first appeared in FreeBSD 2.2.6.

AUTHORS

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