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Full Discussion: vxvm root disk booting problem - solved with boot -a. How?
Operating Systems Solaris vxvm root disk booting problem - solved with boot -a. How? Post 302399372 by csaunders on Saturday 27th of February 2010 03:26:26 PM
Old 02-27-2010
Quote:
Originally Posted by badoshi
Hi All,

We had a Sun Netra T1 go down the other day, the root disk was mirrored using vxvm. Upon boot from either disk, we had the following error appear:

Code:
    WARNING: Error writing ufs log state
    WARNING: ufs log for / changed state to Error
    WARNING: Please umount(1M) / and run fsck(1M)
    WARNING: Error writing master during ufs log roll
    WARNING: ufs log for / changed state to Error
    WARNING: Please umount(1M) / and run fsck(1M)
    Cannot mount root on /pseudo/vxio@0:0 fstype ufs
    panic[cpu0]/thread=140a000: vfs_mountroot: cannot mount root

no problems i thought. I'm well aware of this issue with VX. However I discovered I couldn't boot from vx root or mirror (same errors), we tried the cd, and the that failed too (suspected broken cdrom).

having given up all hope, I randomly tried a 'boot -a' (accepting all defaults) which somehow got me into multiuser, but with no vxvm partitions installed, or vx processes running. From there we were able to recover the system.

Can anyone shed any light as to how or why 'boot -a' worked? Not being a VX guy, I'm really scratching my head, and can't recreate this problem.

TIA.
are you sure it wasnt boot -as? as in single user... that would allow you to fsck the root disk...
 

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LEARN ABOUT MINIX

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)
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