How to reattach a mirror? Post: 302747131

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Operating Systems Solaris How to reattach a mirror? Post 302747131 by brownwrap on Thursday 20th of December 2012 04:45:58 PM

12-20-2012

Registered User

The problem I have, and I did look at what you offered yesterday, is since the reloading of the OS, there are no databases and I don't know how to recover them, though:

metadb there are no existing databases

---------- Post updated at 03:36 PM ---------- Previous update was at 03:34 PM ----------

Quote:

Originally Posted by brownwrap

I do know that the databases is on slice7 of the disk, just don't know how to recover it.

---------- Post updated at 04:45 PM ---------- Previous update was at 03:36 PM ----------

OK, I figured it out. First remember the databases were on slice7, I found a note that said you can look for them using

Code:

metadb -a /dev/dsk/c1t2d0s7
d40: Submirror of d30
    State: Needs maintenance
    Invoke: metasync d30
    Size: 49160256 blocks (23 GB)
    Stripe 0:
        Device     Start Block  Dbase        State Reloc Hot Spare
        c1t2d0s0          0     No            Okay   Yes


d50: Submirror of d30
    State: Needs maintenance
    Invoke: metasync d30
    Size: 49160256 blocks (23 GB)
    Stripe 0:
        Device     Start Block  Dbase        State Reloc Hot Spare
        c1t3d0s0          0     No            Okay   Yes

That told me there were databases.

Next I did metasync

Code:

metasync d30
metasync d31

Some of the mirrors were gone because I had mirrors on the now root disk. But after running the metasync, I was now able to mount the old mirros.

brownwrap

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LEARN ABOUT LINUX

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 5.10							    8 Aug 2003								mddb.cf(4)