NAME    [Toc]    [Back]

     presto - Prestoserve battery-backed memory

SYNOPSIS    [Toc]    [Back]

     presto* at sbus? slot ? offset ?

DESCRIPTION    [Toc]    [Back]

     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.

FILES    [Toc]    [Back]

     /dev/prestoup       block  mode  Prestoserve  card number u,
partition p
     /dev/rprestoup     raw mode Prestoserve card number u,  partition p

SEE ALSO    [Toc]    [Back]

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

BUGS    [Toc]    [Back]

     The  NVSIMM flavour, designed for SPARCstation models 10 and
20, is not
     supported yet.

OpenBSD     3.6                          April      13,      2003