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 vir-
tual volume device drivers (for example, RAID 0, RAID 1, RAID 5) to be performed 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 |SUNWscmr, SUNWscmu |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
scmadm(1M), attributes(5)
SunOS 5.11 2 Oct 2007 nscadm(1M)