No /etc/vfstab file

Question

My Blade 1500 has developed a serious error. It is running Solaris 9 with mirrored disks.
When I try to boot up I get the following messages:
/sbin/rcS: /etc/vfstab: cannot open
INIT: Cannot create /var/adm/utmpx
INIT: Failed write of utmpx entry:" "
INIT: Failed write of utmpx entry:" "
INIT: SINGLE USER MODE
Previously when I got this mesage I followed the steps outlined in the Solstice DiskSuite 4,2 User Guide to recover from improper /etc/vfstab entries
I was able to mount the correct partition using:
#mount -o rw, remount /dev/md/dsk/d0 /
#metaroot d0
This seemed to fix it, however the problem returned at a later reboot, I repeated the procedure and from this point I also checked all submirrors using FSCK and performed a format->analyze->read on both disks ( as detailed in Big Admin: Responding to disk errors on both root mirrors). Both came up clear.
Finally I checked using metastat, which said I need to resync all mirrors. Again this worked okay.
The problem is now that when I boot I get the same message. I can't use mount.
#mount -o rw,remount /dev/md/dsk/d0
gives
mount: cannot open /etc/vfstab
and
#metastat
gives
metastat: /dev/md/admin: No such device or address
on top of all of this in etc I have no vfstab or system file.
I can also not access the cdrom, I get the "can't read disk label, can't open disk laberl package, evaluating can't open boot device" message.
ok probe-ide
Device 0 (Primary Master )
ATA Model: ST380011A
Device 1 (Primary Slave)
ATA Model: ST380011A
Device 2 (Secondary Master )
Removable ATAPI Model: JLMS XJ-HD166S
Device 3 (Secondary Master )
Not Present
ok devalias
cdrom /pci@1e,600000/ide@d/cdrom@2,0:f
disk /pci@1e,600000/ide@d/disk@0,0
disk1 /pci@1e,600000/ide@d/disk@1,0
I have also tried
cdrom2 /pci@1e,600000/ide@d/cdrom@2,0:f
with no success
Any ideas?

Answer 1

Hello Robert,
When I tried to su to root, it was from a non root account I was talking about not from root.
Yes you were absolutely correct, I was able to login to root on the main system console and back the group name to sys on both files i.e. /usr/bin/su and /sbin/su.static using the chgrp command.
After making the change I was able to su to root from a non root user account.
Also I did not need to take the system down and split the mirror.
Thank you
Dan