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

prestoPrestoserve battery-backed memory

presto* at sbus?

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.

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

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

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

July 11, 2010 OpenBSD-5.1