OpenBSD manual page server

Manual Page Search Parameters

PRESTO(4) Device Drivers Manual (sparc) PRESTO(4)

prestoPrestoserve battery-backed memory

presto* at sbus?
presto* at mainbus? (SS10/SS20 NVSIMM)

The Legato Prestoserve NVRAM SBus cards and NVSIMM used to be part of the “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.

The presto driver does not attempt to achieve such a behaviour, which is questionable with the advent of NFS protocol, version 3.

Instead, it will provide direct access to the NVRAM, as a block device.

block mode Prestoserve card number u, partition p
raw mode Prestoserve card number u, partition p

intro(4), disklabel(5), disklabel(8), MAKEDEV(8)

June 4, 2013 OpenBSD-6.0