[SunHELP] FSCK problem, U30, Solaris 9

[Vermette, Matt Spawar (723)]

Phil,

When you boot the system off CD, make use of the following to ensure a
successful removal of metadevice root filesystem

A)  Execute the following command:  boot cdrom -sw
B)  fsck the boot drive:  fsck /dev/dsk/c0t0d0s0
B)  Mount the root filesystem:  mount /dev/dsk/c0t0d0s0 /a
C)  Move current config files to backup:  mv /a/etc/vfstab
/a/etc/vfstab.bak; mv /a/etc/system /a/etc/system.bak
D)  Move good config files in place:  mv /var/tmp/vfstab /a/etc/vfstab;
mv /var/tmp/system /a/etc/system
    NOTE:  Verify /var/tmp directory.  Booting off of cdrom generates
these files automatically and I am not sure if it's /var/tmp off the top
of my head.

This should get you back to your original logical devices for
troubleshooting and verification.  Also, make sure your Electrically
Erasable Programmable Read-Only Memory (EEPROM) is configured properly
for non-interactive boot.  Otherwise, execute a stop-a after memory
initialization and manually boot your root device in single-user mode.

Matthew A. Vermette
Honeywell Technology Solutions Inc.
Matt.Vermette at navy.mil
Matthew.Vermette at honeywell-tsi.com
8438138896 at mobile.mycingular.com
Comm:  (843)218-7215
DSN:  588-7215
Cell: (843)813-8896



-----Original Message-----
From: sunhelp-bounces at sunhelp.org [mailto:sunhelp-bounces at sunhelp.org]
On Behalf Of Phil Stracchino
Sent: Friday, October 01, 2004 8:55 AM
To: SunHELP; Rescue
Subject: [SunHELP] FSCK problem, U30, Solaris 9


Hey folks,
I just applied the latest Solaris 9 alert and recommended patch clusters
to an U30 running Solaris 9 4/03.  This appears to have caused two
problems:  First, one of the patches added mpt to /etc/driver_aliases
and /etc/driver_classes, but not to /etc/name_to_major, giving the
'WARNING: add spec: No major number for mpt' message at boot.

This, I've fixed.

The other problem is more serious.  The machine is unable to fsck
/dev/md/dsk/d10, which is a two-way mirror mounted as / on this box. All
the other metadevices can be fsck'd, and /dev/md/dsk/d10 can be booted
from, mounted read-only, etc, etc.  However, attempting to fsck it
produces the following:

# fsck -F ufs /dev/md/rdsk/d10
** /dev/md/rdsk/d10
fsck: ioctl _FIOGETSUPERBLOCK error: Inappropriate ioctl for device

I can fsck both of the submirrors fine, and they come up clean.  I've
broken the mirror and alternately re-newfs'd and duplicated both
mirrors, so I know the filesystems themselves should be good.  They fsck
cleanly.  Currently, what's happening is that mount insists the primary
and alternate boot filesystems (the former submirrors) are not ufs.  I
cannot get either one mounted read-write except by booting from a CD.

The root filesystem, as /dev/rdsk/c0t0d0s0, can be fsck'd, and mounts
fine read-only, but any attempt to remount it read-write yields:

# mount -F ufs -o rw,remount /dev/dsk/c0t0d0s0
mount: /dev/dsk/c0t0d0s0 is not this fstype

I don't know if I've fully successfully gotten the system to stop trying
to boot from the metadevice (/dev/md/dsk/d10), because I can't get a
booted root filesystem mounted read-write so that I can run metaroot to
properly set the boot.


Any advice on how I can get this problem fixed and get this machine back
in operation?  I've been working on this since about 10pm last night and
I'm making very little progress.



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