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Full Discussion: new - How i can implement Mirroring
Operating Systems Solaris new - How i can implement Mirroring Post 302268168 by kumarmani on Monday 15th of December 2008 06:12:21 AM
Old 12-15-2008
Sorry I couldn't understand the above line.

As per my understanding all you need to do is create a metadb on both the disk. Take any of the unused slice , allocate space to that and create a 3 copy of meta db on the slice , some think like this

Quote:
#metadb -f -a -n 3 c0t0d0s7 c0t1d0s7
e.g. I am taking slice 7 for meta database

check the same with

Quote:
#metadb
For / ( root)

Quote:
# metainit -f d1 1 1 c0t0d0s0
# metainit d2 1 1 c0t1d0s0
# metainit d0 -m d1
# metaroot d0
# metattach d0 d2

Likewise you can create volume for rest of the partition

Once done change the /etc/vfstab entry to point the partition towards the different volumes

Do the required entry into the /etc/system for rootdev

Also you need set the rootdisk/rootmirror

Reboot the system

( please verify the above steps I am just giving you kind of direction, I mean how you can plan the entire activity)
 

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LEARN ABOUT OPENSOLARIS

mddb.cf

mddb.cf(4)							   File Formats 							mddb.cf(4)

NAME

       mddb.cf - metadevice state database replica locations

SYNOPSIS

       /etc/lvm/mddb.cf

DESCRIPTION

       The /etc/lvm/mddb.cf file is created when the metadb(1M) command is invoked. You should never directly edit this file.

       The  file /etc/lvm/mddb.cf is used by the metainit(1M) command to find the locations of the metadevice state databases replicas. The metadb
       command creates the file and updates it each time it is run. Similar information is entered in the /kernel/drv/md.conf file.

       Each metadevice state database replica has a unique entry in the /etc/lvm/mddb.cf file. Each entry contains the driver and minor unit  num-
       bers  associated  with  the block physical device where a replica is stored. Each entry also contains the block number of the master block,
       which contains a list of all other blocks in the replica.

       Entries in the /etc/lvm/mddb.cf file are of the form: driver_name minor_t daddr_t  checksum where driver_name  and  minor_t  represent  the
       device  number  of  the physical device storing this replica. daddr_t is the disk block address. checksum is used to make certain the entry
       has not been corrupted. A pound sign (#) introduces a comment.

EXAMPLES

       Example 1 Sample File

       The following example shows a mddb.cf file.

	 #metadevice database location file do not hand edit
	 #driver minor_t daddr_t device id	 checksum
	 sd	 152	 16	 id1,sd@SSEAGATE_JDD288110MC9LH/a	 -2613

       In the example above, the value for daddr_t indicates that the offset from the start of a given partition is 16 disk blocks from the  start
       of that partition.

FILES

       /etc/lvm/mddb.cf

       /kernel/drv/md.conf

SEE ALSO

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

       Solaris Volume Manager Administration Guide

SunOS 5.11							    8 Aug 2003								mddb.cf(4)
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