Sponsored Content
Operating Systems Solaris Lost Root Password on VXVM Encapsulated Root Disk Post 302604586 by sunnyd76 on Tuesday 6th of March 2012 06:49:03 AM
Old 03-06-2012
Lost Root Password on VXVM Encapsulated Root Disk

Hi All

Hope it's okay to post on this sub-forum, couldn't find a better place

I've got a 480R running solaris 8 with veritas volume manager managing all filesystems, including an encapsulated root disk (I believe the root disk is encapsulated as one of the root mirror disks has an entry under /etc/vx/reconfig.d/disk.d/c1t0d0). The root password has been lost and I need to reset it. I've found what looks like a decent document online that suggests that I need to unencapsulate the root disk prior to changing the shadow entry. Seems risky work for a simple change - i'm hoping there may be a shortcut but heyho otherwise... I'm probably being over cautious Smilie

As the disk is encapsulated, can I just remove one of the disks while the system is live (effectively splitting the mirror), then boot from CD, mount the root FS, edit the shadow directly, boot again and just replace the removed disk? Any idea if the FS would be marked as 'dirty' by vxvm if I did this and not be bootable?

Assuming my finger in the air solution above won't work. Any idea if the document will be okay to run with?

Thanks!
Sunny

Last edited by methyl; 03-06-2012 at 12:31 PM..
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Root Password Lost !!!

I've forgotten root password on one of Solaris machines, i searched in forumes to find a similar case but there's no proceudre here to reinintialize root password, cause most of related commands & even single user mode needs root password that i don't have. Any solution would be helpful. --rgrds,... (9 Replies)
Discussion started by: nikk
9 Replies

2. UNIX for Advanced & Expert Users

I lost my password root

Hello ... I lost my password root ! maybe someone can to help me to log in HP_UX, i started the server in " Singel - User" and i changed my password to new password and it`s not working .. what i must to do ??? (4 Replies)
Discussion started by: yanly
4 Replies

3. UNIX for Advanced & Expert Users

Lost Root Password

I have recently become the sys adm guy for our unix systems here for my shop. I have a pretty good understanding of the system, but there is just some stuff that I don't know. Right now one of those things is to recover the password for a unix system. I know that there is a way that you can use... (2 Replies)
Discussion started by: GlockCW
2 Replies

4. Answers to Frequently Asked Questions

Lost root password / Can't login as root

We have quite a few threads about this subject. I have collected some of them and arranged them by the OS which is primarily discussed in the thread. That is because the exact procedure depends on the OS involved. What's more, since you often need to interact with the boot process, the... (0 Replies)
Discussion started by: Perderabo
0 Replies

5. Linux

how to access root priveliges if root password is lost

wish to know how to access root password it root password is forgotten in linux (1 Reply)
Discussion started by: wojtyla
1 Replies

6. UNIX for Dummies Questions & Answers

Root Password Lost

I'm attempting to blank out the root user password on a machine that we have forgotten the password for. I have been using the advice posted on this site to boot from CDROM in single user mode, then mounting the root slice and editing the /etc/shadow file. Each time I save the shadow file and... (1 Reply)
Discussion started by: gonzotonka
1 Replies

7. AIX

lost root password in AIX

Hi how do you reset the root password in AIX. I booted to single user mode and it asked for login and password. I have AIX 4.3. Thanks (4 Replies)
Discussion started by: Welfaric
4 Replies

8. UNIX for Advanced & Expert Users

Help with Lost Root Password

This is a common question im sure... I bought a RS/6000 Model 240. Aix 4.3.3 loaded. No root password was supplied to me, but I do have the install media (4 disks). I want to drop into maint mode. So I place the cd into the drive, restart the box ( by pressing the power button, since i do not have... (3 Replies)
Discussion started by: JoeJohnSmith
3 Replies

9. Solaris

vxvm root disk booting problem - solved with boot -a. How?

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: WARNING: Error writing ufs log state WARNING: ufs log for / changed state to Error WARNING: Please umount(1M) / and run... (4 Replies)
Discussion started by: badoshi
4 Replies

10. Solaris

encapsulated root disk replacement

Hello, I have a Sparc system with encapsulated disks. Because of disk errors I had to replace rootdisk, I did it with vxdiskadm 4) replacement, vxdctl disable/enable, vxdiskadm 5) After it it the system boot failed, dropped back to the ok> prompt, message was: The file... (0 Replies)
Discussion started by: ggi
0 Replies
volunroot(8)						      System Manager's Manual						      volunroot(8)

NAME
volunroot - Remove Logical Storage Manager hooks for rootable volumes SYNOPSIS
/usr/sbin/volunroot [-a | -A] OPTIONS
Specifies that all volumes on the system disk be converted back to UNIX disk partitions, not just the root and swap volumes, rootvol and swapvol. Forces removal of the private region unless it is the last one in the system. DESCRIPTION
The volunroot script can be used to restore the accessibility of the root, swap, and other file systems on the boot disk directly through disk partitions instead of through volume devices. The script also removes other changes that were made to enable booting of the system from the root volume, so that the system will boot with no dependency on the Logical Storage Manager. When used with no options, volunroot affects only the root and swap volumes, rootvol and swapvol. For volunroot to work properly, only one plex must exist for each of the affected volumes. This plex must be the one created by volrootmir or the original plex created when the root disk was encapsulated. This ensures that the underlying subdisks will have equivalent partitions defined for them on the disk. If these conditions are not met, the volunroot operation fails and none of the volumes are converted to disk partitions. The unwanted plexes can be removed using either voledit or volplex. SEE ALSO
volencap(8), voldiskadm(8), voledit(8), volintro(8), volplex(8), volrootmir(8) volunroot(8)
All times are GMT -4. The time now is 07:58 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy