08-28-2006
Ask your emc guys. We use the command 'inq' to get the details, but it may be different depending on the type of storage.
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LEARN ABOUT CENTOS
blkmapd
blkmapd(8) System Manager's Manual blkmapd(8)
NAME
blkmapd - pNFS block layout mapping daemon
SYNOPSIS
blkmapd [-d] [-f]
DESCRIPTION
The blkmapd daemon performs device discovery and mapping for the parallel NFS (pNFS) block layout client [RFC5663].
The pNFS block layout protocol builds a complex storage hierarchy from a set of simple volumes. These simple volumes are addressed by con-
tent, using a signature on the volume to uniquely name each one. The daemon locates a volume by examining each block device in the system
for the given signature.
The topology typically consists of a hierarchy of volumes built by striping, slicing, and concatenating the simple volumes. The blkmapd
daemon uses the device-mapper driver to construct logical devices that reflect the server topology, and passes these devices to the kernel
for use by the pNFS block layout client.
OPTIONS
-d Performs device discovery only then exits.
-f Runs blkmapd in the foreground and sends output to stderr (as opposed to syslogd)
SEE ALSO
nfs(5), dmsetup(8)
RFC 5661 for the NFS version 4.1 specification.
RFC 5663 for the pNFS block layout specification.
AUTHORS
Haiying Tang <Tang_Haiying@emc.com>
Jim Rees <rees@umich.edu>
11 August 2011 blkmapd(8)