Reset lost root password and now have read only filesystem

Hello,
I have recently had to reset a locked root password by booting from cdrom, mounting the first boot disk, editing the shadow file to remove root's password and rebooting the system.
The system has booted OK but, I now have a read only filesystem - everything in / cannot be edited, passwd doesnt work etc.
df -k shows the root (/) filesystem has been mounted on the physical disk I edited:
Filesystem kbytes used avail capacity Mounted on
/pci@83,4000/FJSV,ulsa@2,1/disk@0,0:a 10085836 185862 9799116 2% /
but in the vfstab it still references the disksuite metadevice:
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
/dev/md/dsk/d30 /dev/md/rdsk/d30 / ufs 1 no -
So, can I simply boot from CDROM again, amend the vfstab to be /dev/dsk/c0t0d0s0 (instead of /dev/md/dsk/d03) and reboot?
Any help with this is appreciated!
Thanks,
Emma

df -k should have shown root mounted on md0
e.g. on my machine
# df -k
Filesystem kbytes used avail capacity Mounted on
/dev/md/dsk/d0 8260691 4366317 3811768 54% /
what does /etc/system show for rootdev?
# grep rootdev /etc/system
* rootdev: Set the root device. This should be a fully
* rootdev:/sbus@1,f8000000/esp@0,800000/sd@3,0:a
rootdev:/pseudo/md@0:0,0,blk
Remember if this is a mirrored drive, when you boot from CD you may need to mount both sides of the mirror and make changes on both sides- otherwise the replication may not goes as expected.
Actually, I have run into problems with the modifying one side of a mirror this way. In the past Sun tech support would recommend that I break the mirror and then rebuild it once the system is up and running. So in your case you may want to boot from CD, mount the 1st disk slice, edit /etc/vfstab AND /etc/system, boot into the OS and use the various meta commands to delete and rebuild the mirror- or at least maybe to drop and reattach the 2nd 1/2 of the mirror.

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Solstice DiskSuite[TM] Software: How to Delete and Reset a Lost Root Password on a System With a Mirrored Root Disk [ID 1010755.1]
Solution
Steps to Follow
How to delete and reset a lost root password on a system with a mirrored root disk.
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disk2 c0t2d0
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** Phase 1 .....
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root:c3.yAVmYodWsc:6445::::::
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root::6445::::::
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*rootdev:/pseudo/md@0:0,0,blk
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12) In the /a/etc/vfstab file, replace the lines for the system filesystem meta-devices with their underlying partitions. For example, change lines from
/dev/md/dsk/d0 /dev/md/rdsk/d0 / ufs 1 no -
to
/dev/dsk/c1t0d0s0 /dev/rdsk/c1t0d0s0 / ufs 1 no -
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13) Unmount root, check the root filesystem, and then stop the system:
# cd /
# umount /a
# fsck /dev/rdsk/c1t0d0s0
# stop-a
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ok boot -swTHIS STEP IS VERY IMPORTANT; YOU MUST BOOT TO SINGLE-USER MODE TO AVOID FILESYSTEM CORRUPTION.
If the system does not boot to single user mode, you might have made a mistake in the previous steps.
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# metaclear -f -r d0
Running the metaclear command not only clears the metamirror but also clears the submirrors that are part of this mirror.
16) When the metamirror is cleared, continue the boot up to multiuser mode by either pressing CTRL-D or by entering the following:
# exit
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many thanks

Hi,
Halt your machine.
Boot with fail-safe mode.
format and list out the disks. (You can get the root & mirror disk (c#t#d#) details from /etc/lvm/md.tab of your root or mirror disk. Earlier explorer output may help)
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http://support.apple.com/kb/ht1212
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http://tinyurl.com/7ndy8tb
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~~~~~~~~~~~~~
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~~~~~~~~~~~~~
Try it and good luck. You have nothing more to lose if it doesn't work for you.
 Cheers, Tom

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Reset lost root password and now have read only filesystem

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