metarecover(1M) 					  System Administration Commands					   metarecover(1M)

NAME

       metarecover - recover soft partition information

SYNOPSIS

       /sbin/metarecover [-n] [-v] [-s setname] component -p

       /sbin/metarecover [-n] [-v] [-s setname] component -p {-d}

       /sbin/metarecover [-n] [-v] [-s setname] component -p {-m}

DESCRIPTION

       The  metarecover  command scans a specified component to look for soft partition configuration information and to regenerate the configura-
       tion.

OPTIONS

       The following options are supported:

       -d	     Recover soft partitions in the metadevice state database from the extent headers on the device. Options -d and -m	are  mutu-
		     ally exclusive.

       -m	     Regenerate  the extent headers and reapplies them to the underlying device based on the soft partitions listed in the metade-
		     vice state database. Options -d and -m are mutually exclusive.

       -n	     Do not actually perform the operation. Show the output or errors that would have resulted from the  operation,  had  it  been
		     run.

       -p	     Regenerate  soft  partitions based on the metadevice state database or extent headers on the underlying device. If neither -d
		     nor -m are specified, this option compares the soft partition information in the metadevice  state  database  to  the  extent
		     headers.

       -s setname    Specify  the  name  of  the diskset on which metarecover works. Using the s option causes the command to perform its function
		     within the specified diskset. Without the -s option, the metarecover command operates on the  metadevices	and/or	hot  spare
		     pools in the local diskset.

		     This option is required to recover former sps from a diskset component or raw-device. setname must be identical to the former
		     setname in which the sps were created. The set numbers, however, seem irrelevant.

       -v	     Verbose mode, displaying the changes being made.

OPERANDS

       The following operand is supported:

       component    Specifies the c*t*d*s* number of the disk or slice containing the partitions, or the device name (for  example,  d10)  of  the
		    metadevice containing the partitions.

		    component can be a slice name, component name, /dev/dsk path, or /dev/rdsk path.

EXAMPLES

       Example 1 Updating Metadevice State Database Based on Disk Extent Headers

       A  disk containing soft partitions is moved from one system to another. The system administrator would like to use the existing soft parti-
       tions. metarecover updates the metadevice state database based on the extent headers on the disk.

	 # metarecover -v c0t3d0s2 -p -d

       Example 2 Updating Metadevice State Database Based on Incomplete Soft Partition Creation

       A system crashes in the middle of creating a new soft partition. The soft partition is in the creating state and the driver  does  not  let
       that device be opened. metarecover rewrites the extent headers for the partially created soft partition and mark it as Okay.

	 # metarecover -v c0t3d0s2 -p -m

       Example 3 Updating Extent Headers Based on Metadevice State Database

       Someone	accidentally  overwrote  a portion of a disk leaving extent headers destroyed. metarecover rewrites the extent headers to ensure a
       valid soft partition configuration, though user data is not recovered.

	 # metarecover -v d5 -m

       The following example implements the same command using a descriptive name.

	 # metarecover -v myvolume -m

       Example 4 Validating Soft Partition Configuration

       To validate the existing soft partition configuration, use metarecover with only the -p flag.

	 # metarecover c0t3d0s2 -p

EXIT STATUS

       The following exit values are returned:

       0     Successful completion.

       >0    An error occurred.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWmdr			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mdmonitord(1M), metaclear(1M),  metadb(1M),  metadetach(1M),  metahs(1M),  metainit(1M),  metaoffline(1M),  metaonline(1M),  metaparam(1M),
       metarename(1M),	metareplace(1M), metaroot(1M), metaset(1M), metassist(1M), metastat(1M), metasync(1M), metattach(1M), md.tab(4), md.cf(4),
       mddb.cf(4), md.tab(4), attributes(5), md(7D)

SunOS 5.11							    26 Mar 2006 						   metarecover(1M)