1 '\" te
   2 .\" Copyright (c) 2007, Sun Microsystems, Inc.  All rights reserved.
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   4 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
   5 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
   6 .TH NSCADM 1M "Oct 2, 2007"
   7 .SH NAME
   8 nscadm \- network storage control utility
   9 .SH SYNOPSIS
  10 .LP
  11 .nf
  12 \fBnscadm\fR freeze \fIdevice\fR
  13 .fi
  14 
  15 .LP
  16 .nf
  17 \fBnscadm\fR unfreeze \fIdevice\fR
  18 .fi
  19 
  20 .LP
  21 .nf
  22 \fBnscadm\fR isfrozen \fIdevice\fR
  23 .fi
  24 
  25 .SH DESCRIPTION
  26 .sp
  27 .LP
  28 The \fBnscadm\fR command performs several network storage control functions.
  29 .sp
  30 .LP
  31 The \fBnscadm\fR \fBfreeze\fR command closes existing references to the
  32 specified device, and blocks future accesses. This allows maintenance of
  33 virtual volume device drivers (for example, RAID 0, RAID 1, RAID 5) to be
  34 performed without shutting down the system.
  35 .sp
  36 .LP
  37 The \fBnscadm\fR \fBunfreeze\fR command reverses the effects of \fBnscadm\fR
  38 \fBfreeze\fR for the specified device.
  39 .sp
  40 .LP
  41 The \fBnscadm\fR \fBisfrozen\fR command returns the current status of the
  42 specified device.
  43 .SH OPTIONS
  44 .sp
  45 .LP
  46 The \fBnscadm\fR command supports the following option.
  47 .sp
  48 .ne 2
  49 .na
  50 \fB\fB-h\fR\fR
  51 .ad
  52 .RS 13n
  53 Display the usage menu.
  54 .RE
  55 
  56 .SH OPERANDS
  57 .sp
  58 .LP
  59 The \fBnscadm\fR command line supports the following operand.
  60 .sp
  61 .ne 2
  62 .na
  63 \fB\fIdevice\fR\fR
  64 .ad
  65 .sp .6
  66 .RS 4n
  67 Specifies the storage device to be acted upon by \fBnscadm\fR.
  68 .RE
  69 
  70 .SH EXIT STATUS
  71 .sp
  72 .LP
  73 For the \fBfreeze\fR and \fBunfreeze\fR, subcommands \fBnscadm\fR returns the
  74 following exit values:
  75 .sp
  76 .ne 2
  77 .na
  78 \fB\fB0\fR\fR
  79 .ad
  80 .RS 13n
  81 Success
  82 .RE
  83 
  84 .sp
  85 .ne 2
  86 .na
  87 \fB\fB255\fR\fR
  88 .ad
  89 .RS 13n
  90 Error
  91 .RE
  92 
  93 .sp
  94 .LP
  95 For the \fBisfrozen\fR subcommand, \fBnscadm\fR returns the following exit
  96 values:
  97 .sp
  98 .ne 2
  99 .na
 100 \fB\fB0\fR\fR
 101 .ad
 102 .RS 13n
 103 Device is currently frozen.
 104 .RE
 105 
 106 .sp
 107 .ne 2
 108 .na
 109 \fB\fB1\fR\fR
 110 .ad
 111 .RS 13n
 112 Device is not currently frozen.
 113 .RE
 114 
 115 .sp
 116 .ne 2
 117 .na
 118 \fB\fB255\fR\fR
 119 .ad
 120 .RS 13n
 121 Error
 122 .RE
 123 
 124 .SH ATTRIBUTES
 125 .sp
 126 .LP
 127 See \fBattributes\fR(5) for descriptions of the following attributes:
 128 .sp
 129 
 130 .sp
 131 .TS
 132 box;
 133 c | c
 134 l | l .
 135 ATTRIBUTE TYPE  ATTRIBUTE VALUE
 136 _
 137 Interface Stability     Evolving
 138 .TE
 139 
 140 .SH SEE ALSO
 141 .sp
 142 .LP
 143 \fBscmadm\fR(1M), \fBattributes\fR(5)