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.