MirOS Manual: presto(4)  PRESTO(4)              BSD Programmer's
Manual (SPARC)               PRESTO(4)        presto -
Prestoserve battery-backed memory        presto* at sbus? slot ?
offset ?        The Legato Prestoserve NVRAM cards used to be
part of the "NFS      accelerator" product, which used the cards
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.        /dev/prestoup
block mode Prestoserve card number u, partition p
/dev/rprestoup     raw mode Prestoserve card number u, partition
p        intro(4), disklabel(5), MAKEDEV(8), disklabel(8)
The NVSIMM flavour, designed for SPARCstation models 10 and 20,
is not      supported yet.  MirOS BSD #10-current
April 13, 2003