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-.\"	$OpenBSD: presto.4,v 1.6 2013/06/04 21:05:53 miod Exp $
-.\" Copyright (c) 2003, Miodrag Vallat
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-.\" DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-.\" POSSIBILITY OF SUCH DAMAGE.
-.\"
-.Dd $Mdocdate: June 4 2013 $
-.Dt PRESTO 4 sparc
-.Os
-.Sh NAME
-.Nm presto
-.Nd Prestoserve battery-backed memory
-.Sh SYNOPSIS
-.Cd "presto* at sbus?"
-.Cd "presto* at mainbus?" Pq "SS10/SS20 NVSIMM"
-.Sh DESCRIPTION
-The
-.Tn Legato
-Prestoserve NVRAM SBus cards and NVSIMM used to be part of the
-.Dq NFS accelerator
-product, which used the device's memory as an NFS-dedicated cache, increasing
-performance of NFS servers exporting filesystem as NFS protocol, version 2.
-.Pp
-The
-.Nm
-driver does not attempt to achieve such a behaviour, which is questionable
-with the advent of NFS protocol, version 3.
-.Pp
-Instead, it will provide direct access to the NVRAM, as a block device.
-.Sh FILES
-.Bl -tag -width /dev/rprestoXXXXX -compact
-.It Pa /dev/presto Ns Ar u Ns Ar p
-block mode Prestoserve card number
-.Ar u ,
-partition
-.Ar p
-.It Pa /dev/rpresto Ns Ar u Ns Ar p
-raw mode Prestoserve card number
-.Ar u ,
-partition
-.Ar p
-.El
-.Sh SEE ALSO
-.Xr intro 4 ,
-.Xr disklabel 5 ,
-.Xr disklabel 8 ,
-.Xr MAKEDEV 8