'\" te
.\" Copyright (c) 2004, Sun Microsystems, Inc. All Rights Reserved.
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.TH MDMONITORD 1M "Jul 25, 2004"
.SH NAME
mdmonitord \- daemon to monitor metadevices
.SH SYNOPSIS
.LP
.nf
\fB/usr/sbin/mdmonitord\fR [\fB-t\fR \fItime_interval\fR]
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmdmonitord\fR utility is part of Solaris Volume Manager. It monitors and
checks RAID1 (mirrors), RAID5 and hot spares.
.sp
.LP
There are two methods for checking:
.RS +4
.TP
.ie t \(bu
.el o
At fixed time intervals.
.RE
.RS +4
.TP
.ie t \(bu
.el o
When a RAID-1 (mirror), RAID-5, or hot spare fails. A failure generates  an
error event which triggers a check of these metadevices.
.RE
.SH OPTIONS
.sp
.LP
The following options are supported:
.sp
.ne 2
.na
\fB\fB-t\fR\fR
.ad
.RS 6n
Time interval in seconds.  The default value is 0, which causes probes to occur
only upon an error. If you want to run \fBmdmonitord\fR at a regular interval,
a value of 1800 (seconds, every half hour) is recommended as a starting point.
.RE

.SH EXIT STATUS
.sp
.LP
The following exit values are returned:
.sp
.ne 2
.na
\fB\fB0\fR\fR
.ad
.RS 6n
Successful completion.
.RE

.sp
.ne 2
.na
\fB>0\fR
.ad
.RS 6n
An error occurred.
.RE

.SH SEE ALSO
.sp
.LP
\fBsvcs\fR(1), \fBmetaclear\fR(1M), \fBmetadb\fR(1M), \fBmetadetach\fR(1M),
\fBmetahs\fR(1M), \fBmetainit\fR(1M), \fBmetaoffline\fR(1M),
\fBmetaonline\fR(1M), \fBmetaparam\fR(1M), \fBmetarecover\fR(1M),
\fBmetarename\fR(1M), \fBmetareplace\fR(1M), \fBmetaroot\fR(1M),
\fBmetaset\fR(1M), \fBmetassist\fR(1M), \fBmetastat\fR(1M), \fBmetasync\fR(1M),
\fBmetattach\fR(1M), \fBsvcadm\fR(1M), \fBmd.tab\fR(4), \fBmd.cf\fR(4),
\fBmddb.cf\fR(4), \fBmd.tab\fR(4), \fBattributes\fR(5), \fBsmf\fR(5),
\fBmd\fR(7D)
.sp
.LP
\fI\fR
.SH NOTES
.sp
.LP
Since frequent probes can affect performance, it is recommended that the
intervals between probes be limited.
.sp
.LP
The \fBmdmonitord\fR service is managed by the service management facility,
\fBsmf\fR(5), under the service identifier:
.sp
.in +2
.nf
svc:/system/mdmonitor
.fi
.in -2
.sp

.sp
.LP
Administrative actions on this service, such as enabling, disabling, or
requesting restart, can be performed using \fBsvcadm\fR(1M). The service's
status can be queried using the \fBsvcs\fR(1) command.