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nscadm(1M)		System Administration Commands		    nscadm(1M)

NAME
       nscadm - network storage control utility

SYNOPSIS
       nscadm freeze device

       nscadm unfreeze device

       nscadm isfrozen device

DESCRIPTION
       The nscadm command performs several network storage control functions.

       The  nscadm  freeze command closes existing references to the specified
       device, and blocks future accesses. This allows maintenance of  virtual
       volume  device drivers (for example, RAID 0, RAID 1, RAID 5) to be per‐
       formed without shutting down the system.

       The nscadm unfreeze command reverses the effects of nscadm  freeze  for
       the specified device.

       The nscadm isfrozen command returns the current status of the specified
       device.

OPTIONS
       The nscadm command supports the following option.

       -h	    Display the usage menu.

OPERANDS
       The nscadm command line supports the following operand.

       device

	   Specifies the storage device to be acted upon by nscadm.

EXIT STATUS
       For the freeze and unfreeze, subcommands nscadm returns	the  following
       exit values:

       0	    Success

       255	    Error

       For the isfrozen subcommand, nscadm returns the following exit values:

       0	    Device is currently frozen.

       1	    Device is not currently frozen.

       255	    Error

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Availability		     │service/storage/avs/cache-   │
       │			     │management,   service/stor‐  │
       │			     │age/avs/cache-management	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface Stability	     │Committed			   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       scmadm(1M), attributes(5)

SunOS 5.11			  2 Oct 2007			    nscadm(1M)

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