Copying disk - dd or lucreate? Post: 302732035

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Operating Systems Solaris Copying disk - dd or lucreate? Post 302732035 by rbatte1 on Friday 16th of November 2012 11:54:32 AM

11-16-2012

Moderator

You may be better to document the disk structure and backup up each filesystem. Do you know if this is a Veritas managed disk or just a simple disk plugged into the server? If it is Veritas then there are tools to build mirrors, but you will need to be sure that the disk can be seen from the OK prompt and the path you would need to boot from.

If it is just a simple single disk, then I would presume it is sliced with the format command. It's a little dangerous I admit, but you can start the tool and pick the options to display a partition print of the disk in question. You could then record that information ready to format a new disk if you ever need to.

To handle the filesystems, I would suggest using ufsdump It has been many years since I have had the pleasure of Solaris, so you'd better read the man pages for it, but you can sequentially dump each filesystem to tape (using the no-rewind tape device, possibly /dev/rmt0n) for each filesystem contained on your disk.

The reverse would be to boot from CD and then after using the format utility to slice the replacement disk (or on a DR server, of course) and then use ufsrestore with the no-rewind tape device to recover the filesystems. In theory you should then be able to boot! If you are on a DR server, there may well be device mismatches, so that has to be handled too, but let me know if this is a likely scenario and I will see what we have stored away in deep, darkest archive.

I hope that this is useful,
Robin
Liverpool/Blackburn
UK

rbatte1

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installboot

installboot(1M) 														   installboot(1M)

NAME

       installboot - install bootblocks in a disk partition

SYNOPSIS

       installboot bootblk raw-disk-device

       The boot(1M) program, ufsboot, is loaded from disk by the bootblock program which resides in the boot area of a disk partition.

       The  ufs  boot objects are platform-dependent, and reside in the /usr/platform/platform-name/lib/fs/ufs directory. The platform name can be
       found using the -i option of uname(1).

       The installboot utility is a SPARC only program. It is not supported on the  architecture.  users should use installgrub(1M) instead.

       bootblk	       The name of the bootblock code.

       raw-disk-device The name of the disk device onto which the bootblock code is to be installed; it must be a character device which is  read-
		       able and writable. Naming conventions for a SCSI or IPI drive are c?t?d?s? and c?d?s? for an IDE drive.

       Example 1: Installing UFS Boot Block

       To install a ufs boot block on slice 0 of target 0 on controller 1 of the platform where the command is being run, use:

	      example# installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk 
		   /dev/rdsk/c1t0d0s0

       /usr/platform/platform-name/lib/fs/ufs

	   directory where ufs boot objects reside.

       /platform/platform-name/ufsboot

	   second level program to boot from a disk or CD

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

       od(1), uname(1), boot(1M), init(1M), kadb(1M), kernel(1M), monitor(1M), reboot(1M), rpc.bootparamd(1M), init.d(4), attributes(5)

WARNINGS

       The installboot utility fails if the bootblk or openfirmware files do not exist or if the raw disk device is not a character device.

								    11 Apr 2005 						   installboot(1M)