.TH mmdelnsd 02/16/06
mmdelnsd Command
.SH "Name"
.PP
\fBmmdelnsd\fR - Deletes Network Shared Disks (NSDs) from the GPFS
cluster.
.SH "Synopsis"
.PP
\fBmmdelnsd\fR
{"\fIDiskName\fR[;\fIDiskName\fR...]"
| \fB-F\fR \fIDiskFile\fR}
.PP
Or,
.PP
\fBmmdelnsd\fR \fB-p\fR \fINSDId\fR [\fB-N\fR
{\fINode\fR[,\fINode\fR] }]
.SH "Description"
.PP
The \fBmmdelnsd\fR command serves two purposes:
.RS +3
.HP 3
1. Delete NSDs from the GPFS cluster.
.HP 3
2. 
Remove the unique NSD volume ID left on the disk after the failure of a
previous invocation of the \fBmmdelnsd\fR command. The NSD had been
successfully deleted from the GPFS cluster but there was a failure to clear
sector 2 of the disk.
.RE
.PP
The NSD being deleted cannot be part of any file system. Either the
\fBmmdeldisk\fR or \fBmmdelfs\fR command must be issued prior to deleting
the NSD from the GPFS cluster.
.PP
The NSD being deleted cannot be a tiebreaker disk. Use the \fBmmchconfig\fR command to assign new tiebreaker disks
prior to deleting the NSD from the cluster.
.PP
\fBResults\fR
.PP
Upon successful completion of the \fBmmdelnsd\fR command, these tasks
are completed:
.RS +3
.HP 3
\(bu All references to the disk are removed from the GPFS cluster data.
.HP 3
\(bu Sector 2 of the disk is cleared of the unique NSD volume ID.
.RE
.SH "Parameters"
.PP
.RS +3
\fB\fIDiskName\fR[;\fIDiskName\fR...]
\fR
.RE
.RS +9
Specifies the names of the NSDs to be deleted from the GPFS
cluster. Specify the names generated when the NSDs were created.
Use the
\fBmmlsnsd -F\fR command to display disk
names. If there is more than one disk to be deleted, delimit each name
with a semicolon (;) and enclose the list of disk names in quotation
marks.
.RE
.PP
.RS +3
\fB-F \fIDiskFile\fR
\fR
.RE
.RS +9
Specifies a file containing the names of the NSDs, one per line, to be
deleted from the GPFS cluster.
.RE
.PP
.RS +3
\fB-N \fINode\fR[,\fINode\fR]
\fR
.RE
.RS +9
Specifies the nodes to which the disk is attached. If no nodes are
listed, the disk is assumed to be directly attached to the local node.
Only one or two nodes may be specified with the \fB-N\fR flag.
.PP
For information on how to specify node names, see \fISpecifying nodes as input to GPFS commands\fR
in \fIGPFS: Administration and Programming Reference\fR.
.RE
.PP
.RS +3
\fB-p \fINSDId\fR
\fR
.RE
.RS +9
Specifies the NSD volume ID of an NSD that needs to be cleared from the
disk as indicated by the failure of a previous invocation of the
\fBmmdelnsd\fR command.
.RE
.SH "Options"
.PP
NONE
.SH "Exit status"
.PP
.PP
.RS +3
\fB0
\fR
.RE
.RS +9
Successful completion.
.RE
.PP
.RS +3
\fBnonzero
\fR
.RE
.RS +9
A failure has occurred.
.RE
.SH "Security"
.PP
You must have root authority to run the \fBmmdelnsd\fR command.
.PP
You may issue the \fBmmdelnsd\fR command from any node in the GPFS
cluster.
.PP
When using the \fBrcp\fR and \fBrsh\fR commands for remote
communication, a properly configured \fB.rhosts\fR file must exist
in the root user's home directory on each node in the GPFS
cluster. If you have designated the use of a different remote
communication program on either the
\fBmmcrcluster\fR
or the
\fBmmchcluster\fR command, you must
ensure:
.RS +3
.HP 3
1. Proper authorization is granted to all nodes in the GPFS cluster.
.HP 3
2. The nodes in the GPFS cluster can communicate without the use of a
password, and without any extraneous messages.
.RE
.SH "Examples"
.PP
To delete \fBgpfs2nsd\fR and \fBgpfs3nsd\fR from the GPFS cluster,
issue this command:
.sp
.nf
mmdelnsd "gpfs2nsd;gpfs3nsd"
.fi
.sp
.PP
The system displays output similar to:
.sp
.nf
mmdelnsd: Processing disk gpfs2nsd
mmdelnsd: Processing disk gpfs3nsd
mmdelnsd: 6027-1371 Propagating the changes to all affected
                    nodes. This is an asynchronous process.
.fi
.sp
.PP
To confirm the deletion, issue this command:
.sp
.nf
mmlsnsd
.fi
.sp
.PP
The system displays information similar to:
.sp
.nf
 File system   Disk name    Primary node      Backup node
 --------------------------------------------------------
 fs0           gpfs16nsd    k145n06              k145n07
 fs0           gpfs17nsd    k145n06              k145n07
 fs0           gpfs18nsd    k145n06              k145n07
 fs0           gpfs19nsd    k145n06              k145n07
 fs0           gpfs20nsd    k145n06              k145n07
 fs1           gpfs1nsd    (directly attached)
 fs1           gpfs4nsd    (directly attached)\ 
\ 
.fi
.sp
.SH "See also"
.PP
mmcrnsd Command
.PP
mmlsnsd Command
.SH "Location"
.PP
\fB/usr/lpp/mmfs/bin\fR
.PP