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Full Discussion: DiskSuite: Breaking mirrors.
Operating Systems Solaris DiskSuite: Breaking mirrors. Post 94066 by reborg on Tuesday 27th of December 2005 08:03:47 AM
Old 12-27-2005
Quote:
Originally Posted by BOFH
Isn't wtmpx the most likely issue here?
Not very likely actually as Perderabo pointed out.

Quote:
Can you really force a umount?
Yes

Quote:
But I will keep fuser in mind for next time
Good idea



Quote:
Do I go away for coffee then and come back in 2 hours?
Pretty much, you let it finish, then look in lost+found which if you're lucky will contain nothing more than a few log file segments.

And another couple of data points that I didn't think important for the initial question:

Quote:
Really though. In spite of all the other questions and suggestions, the real problem was, why didn't breaking the mirror succeed? Why couldn't I disassemble the mirror and bring the system back up on a single disk in the manner I described?
Without knowing exactly what you did it's really very difficult to say, I have used the procedure many many times without problems.


Quote:
2. Mirrors to ensure system availability in the event of a failed disk.
Unless of course, we're unable to boot to the "good" disk for some reason.

3. flarchive for a jumpstart recovery if the system can't be mirrored.

Currently 2 and 3 are mutually exclusive. If the system isn't mirrored, we use flarchive. Not enough disk for flarchives of all the systems.
Carl
There is no reason at all why 2 and 3 above should be exclusive, solaris supports any combination of the above during installation, granted that in Solaris 8 you do need to be a little creative with a finish script, in Solaris 9 there are jumpstart keywords which make it really easy. However all these choices can all be calculated using custom probes during installation. Something that I have been doing for several years with great success.
 

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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)
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