DPT(4)

DPT(4) | Device Drivers Manual | DPT(4)

# NAME

`dpt` —
DPT EATA SCSI adapter driver

# SYNOPSIS

`dpt* at isa? port ? irq ? dma ?`
`dpt* at eisa? slot ?`
`dpt* at pci? dev ? function ?`
`scsibus* at dpt?`

# DESCRIPTION

The `dpt` driver provides support for third and fourth generation DPT SCSI controllers. All communication with the controllers is conducted via the EATA (Enhanced AT Bus Attachment) protocol.

DPT adapters examine and interpret all SCSI commands received before passing them to any underlying physical device(s). In this way, caching, RAID and other transformations are achieved while remaining transparent to the host operating system.

# HARDWARE

The `dpt` driver provides support for the adapters listed below. Later models are supported by the `iop` driver.

DPT SmartCache III
DPT SmartCache IV
DPT SmartRAID III
DPT SmartRAID IV

# FILES

/dev/dptu
  control device for unit u

# DIAGNOSTICS

None of these messages should be encountered under normal circumstances. It should be noted that the list below is not complete.

dpt%d: readcfg failed - see dpt(4)
  The EATA configuration data did not appear upon request. This may be caused by older firmware. Generally the solution is to power-cycle the affected machine.
dpt%d: spurious intr
  A spurious interrupt was received from the HBA.
dpt%d: bogus status (returned CCB id NNNN)
  A corrupt or incomplete status packet was received from the HBA.

# SEE ALSO

cd(4), ch(4), dpti(4), intro(4), iop(4), scsi(4), sd(4), st(4)

The sysutils/dptutil package.

CAM committee standard CAM/89-004 - the EATA (Enhanced AT Bus Attachment) protocol.

# HISTORY

The `dpt` driver first appeared in NetBSD 1.4.2.

# BUGS

EATA adapters other than listed may function correctly with the `dpt` driver, however a definitive list is not available.

Older boards that do not support scatter-gather I/O or DMA are not supported.

ECC formatted disk and arrays (i.e. with a sector size of 528 bytes) do not work correctly with the PM2041 and certain firmware revisions of the PM3334.

December 7, 2002 | NetBSD 9.3