06-11-2002
Mirroring a disk
Of course, with unix there is always another way if you donot have veritas or disksuite.
Verify that both disk are partitioned alike by using
the format command then choose verify to see the
partitions.
Then if they are alike...
dd if=/dev/rdsk/c0t0d0s0 of=/dev/rdsk/c1t0d0s1
would copy the contents of slice0 on disk0 to slice0 on disk1.
Repeat this for each slice or for each slice that you want mirrored. Of course, the root slice is the most important. After you are done mirroring...try booting off of the mirrored disk...with
boot disk1
from the OK prompt after doing a init 0.
I have done this many times without issues, apart from alittle time to run dd...it works.
Happy mirroring!
8 More Discussions You Might Find Interesting
1. Solaris
Hai ......... my name Rio,
I want to clone my harddisk at Sun Balade 2000 server with Solaris 8 OS, my question is :
a. what kind method for making backup or clonning disk ?
b. what method more easier , quick but still reliable ?
c. how to proceed it ?
Thanks (1 Reply)
Discussion started by: rioria
1 Replies
2. Filesystems, Disks and Memory
Disk cloning
I had an external SCSI master disk that I used to clone to an identical external SCSI disk because the other SCSI disk would become corrupted. My original Master became corrupted so I used one of the other to good disk to copy back to the master. Unfortunately the new master needs... (1 Reply)
Discussion started by: stamperr
1 Replies
3. SCO
Hi.
We tried cloning a SCO Unix hard disk using Norton Ghost.
However, the new cloned hard disk encounter booting problem.
What possibly go wrong? (1 Reply)
Discussion started by: Mizan
1 Replies
4. SCO
Continuing saga of working on making a retail store more robust by creating a backup clone of the main server, a 1995 era :eek: PC running SCO OpenServer 5.0.0b and a discontinued Point of Sales (POS) software system.
I have a PC of the same make and model. The CPU runs faster and it has a... (5 Replies)
Discussion started by: jgt10
5 Replies
5. Ubuntu
I wasn't sure where to put this thread but since i use ubuntu for data recovery, I figured this is the best place. So, a friend passed me a 250G Western Digital hard disk the other day and said that his client needs to get her pictures off it. the problem: windows says it wants to reformat the... (13 Replies)
Discussion started by: old noob
13 Replies
6. AIX
hello folks,
I have a 300GB ROOTVG volume groups with one filesystem /backup having 200GB allocated space
Now, I cannot alt disk clone or mirrorvg this hdisk with another smaller disk. The disk size has to be 300GB; I tried alt disk clone and mirrorvg , it doesn't work. you cannot copy LVs as... (9 Replies)
Discussion started by: filosophizer
9 Replies
7. UNIX for Advanced & Expert Users
Guys can anyone tell how can we do faster disk cloning
Below i found in google
1. dd if=/dev/sda of=/dev/sdb bs=4096 conv=noerror,sync
So adding "conv=noerror,sync " makes it faster looks against not adding it
2. Enable write cache activated (hdparm -W1 /dev/sda) then run dd ..
... (2 Replies)
Discussion started by: heman96
2 Replies
8. Solaris
Hi,
I am trying to clone the hard disk image of Solaris OS on one disk to another disk. After some googling I found that there is a command "dd" to achieve this.
However there is a condition to use the dd command, that the disk geometry of both the disks (source and target disks) should... (5 Replies)
Discussion started by: rajujayanthy
5 Replies
LEARN ABOUT OSF1
volmirror
volmirror(8) System Manager's Manual volmirror(8)
NAME
volmirror - Mirrors volumes on a disk or control default mirroring
SYNOPSIS
/usr/sbin/volmirror [-g diskgroup] [-d yes|no] medianame [new_medianame...]
/usr/sbin/volmirror [-g diskgroup] [-d yes|no] -a [new_medianame...]
/usr/sbin/volmirror [-g diskgroup] [-d yes|no]
/usr/sbin/volmirror [-g diskgroup] -D
OPTIONS
The volmirror command supports the following options: Limits operation of the command to the given disk group, as specified by disk group
ID or disk group name. The medianame operands will be evaluated relative to the given disk group. If no disk group is supplied to the
volmirror command, rootdg is presumed. Changes the default for subsequent volume creation, depending on the option argument. If the option
argument is yes, all subsequent volumes created using the volassist command will automatically be created as mirrored volumes. If the
option argument supplied is no, mirroring will be turned off for future volumes by default. Displays current default status for mirroring.
Mirrors all existing volumes for the specified disk group.
DESCRIPTION
The volmirror command provides a mechanism to mirror all the contents of a specified disk, to mirror all currently unmirrored volumes in
the specified disk group, or to change or display the current defaults for mirroring. All volumes that have only a single plex (mirror
copy), will be mirrored by adding an additional plex.
Volumes containing subdisks that reside on more than one disk will not be mirrored by volmirror.
The volmirror command is generally called from the voldiskadm menus. It is not an interactive command and once called, will continue until
completion of the operation or until a failure is detected.
Note
Due to the nature of generating mirror copies of volumes, this command may take a considerable time to complete.
In the first listed form of the command, the disk media name is supplied on the command line to volmirror. That name is taken to be the
only disk from which volumes should be mirrored. In the case of mirroring volumes from a specified disk, only simple single-subdisk volumes
are mirrored.
In the first and second listed forms of the command, the new_medianame ... parameter identifies a new disk media name (or set of names).
The mirroring operation being performed will use these names as targets on which to allocate the mirrors. An error will result if the same
disk is specified for both the source and target disk and if no other viable targets are supplied.
EXAMPLES
The following are examples of the use of the volmirror command. The following command mirrors the contents of the disk named disk01 to any
available space on any available disk. Subsequent calls to volassist will cause created volumes to be mirrored by default. volmirror -d
yes disk01 The following command displays the current status of default mirroring. It prints the string yes if mirroring is currently
enabled or no, if not. volmirror -D The following command mirrors any volumes on disk02 onto disk03. volmirror disk02 disk03
FILES
The defaults file for volassist parameters.
SEE ALSO
volintro(8), volassist(8), volrootmir(8)
volmirror(8)