Solaris

# mount
/ on /pci@1f,700000/scsi@2/disk@0,0:a read/write/setuid/devices/dev=800010 on Thu Jan  1 00:00:00 1970
/devices on /devices read/write/setuid/devices/dev=4b40000 on Fri Mar 19 12:39:39 2010
/system/contract on ctfs read/write/setuid/devices/dev=4b80001 on Fri Mar 19 12:39:39 2010
/proc on proc read/write/setuid/devices/dev=4bc0000 on Fri Mar 19 12:39:39 2010
/etc/mnttab on mnttab read/write/setuid/devices/dev=4c00001 on Fri Mar 19 12:39:39 2010
/etc/svc/volatile on swap read/write/setuid/devices/xattr/dev=4c40001 on Fri Mar 19 12:39:39 2010
/system/object on objfs read/write/setuid/devices/dev=4c80001 on Fri Mar 19 12:39:39 2010
/etc/dfs/sharetab on sharefs read/write/setuid/devices/dev=4cc0001 on Fri Mar 19 12:39:39 2010

 
mount -F ufs -o rw /dev/dsk/c0t0d0s7 /mnt
mount: /dev/dsk/c0t0d0s7 write-protected

# format
ld.so.1: format: fatal: libdiskmgt.so.1: open failed: No such file or directory
Killed

# more /etc/vfstab
#device         device          mount           FS      fsck    mount   mount
#to mount       to fsck         point           type    pass    at boot options
#
fd      -       /dev/fd fd      -       no      -
/proc   -       /proc   proc    -       no      -
/dev/dsk/c0t0d0s3       -       -       swap    -       no      -
/dev/dsk/c0t0d0s0       /dev/rdsk/c0t0d0s0      /       ufs     1       no      -
/dev/dsk/c0t0d0s6       /dev/rdsk/c0t0d0s6      /usr    ufs     1       no      -
/dev/dsk/c0t0d0s1       /dev/rdsk/c0t0d0s1      /var    ufs     1       no      -
/dev/dsk/c0t0d0s7       /dev/rdsk/c0t0d0s7      /export/home    ufs     2       yes     -
/dev/dsk/c0t0d0s5       /dev/rdsk/c0t0d0s5      /opt    ufs     2       yes     -
/devices        -       /devices        devfs   -       no      -
ctfs    -       /system/contract        ctfs    -       no      -
objfs   -       /system/object  objfs   -       no      -
swap    -       /tmp    tmpfs   -       yes     -
sharefs         -       /etc/dfs/sharetab       sharefs -       no      -

# ls | grep eeprom
eeprom
# ./eeprom
./eeprom: not found
#

ok> boot -wars

boot -wars

Boot device: /pci@1f,700000/scsi@2/disk@0,0  File and args: -wars
Name of system file [/etc/system]:
SunOS Release 5.10 Version Generic_142900-03 64-bit
Copyright 1983-2009 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
root filesystem type [ufs]:
Enter physical name of root device
[/pci@1f,700000/scsi@2/disk@0,0:a]:
Hardware watchdog enabled
WARNING: consconfig: cannot find driver for screen device /pci@1d,700000/SUNW,XVR-100@1
Booting to milestone "milestone/single-user:default".
ERROR: svc:/system/filesystem/root:default failed to mount /usr  (see 'svcs -x' for details)
Failed to plumb IPv4 interface(s): bge0
Hostname: solaris
Requesting System Maintenance Mode
Console login service(s) cannot run
Root password for system maintenance (control-d to bypass):
single-user privilege assigned to /dev/console.
Entering System Maintenance Mode
Mar 20 06:36:34 su: 'su root' succeeded for root on /dev/console

*ident  "@(#)system     1.18    97/06/27 SMI" /* SVR4 1.5 */
*
* SYSTEM SPECIFICATION FILE
*
* moddir:
*
*       Set the search path for modules.  This has a format similar to the
*       csh path variable. If the module isn't found in the first directory
*       it tries the second and so on. The default is /kernel /usr/kernel
*
*       Example:
*               moddir: /kernel /usr/kernel /other/modules
 
* root device and root filesystem configuration:
*
*       The following may be used to override the defaults provided by
*       the boot program:
*
*       rootfs:         Set the filesystem type of the root.
*
*       rootdev:        Set the root device.  This should be a fully
*                       expanded physical pathname.  The default is the
*                       physical pathname of the device where the boot
*                       program resides.  The physical pathname is
*                       highly platform and configuration dependent.
*
*       Example:
*               rootfs:ufs
*               rootdev:/sbus@1,f8000000/esp@0,800000/sd@3,0:a
*
*       (Swap device configuration should be specified in /etc/vfstab.)
 
* exclude:
*
*       Modules appearing in the moddir path which are NOT to be loaded,
*       even if referenced. Note that `exclude' accepts either a module name,
*       or a filename which includes the directory.
*
*       Examples:
*       exclude: win
*               exclude: sys/shmsys
 
* forceload:
*
*       Cause these modules to be loaded at boot time, (just before mounting
*       the root filesystem) rather than at first reference. Note that
*       forceload expects a filename which includes the directory. Also
*       note that loading a module does not necessarily imply that it will
*       be installed.
*
*       Example:
*               forceload: drv/foo
 
* set:
*
*       Set an integer variable in the kernel or a module to a new value.
*       This facility should be used with caution.  See system(4).
*
*       Examples:
*
*       To set variables in 'unix':
*
*               set nautopush=32
*               set maxusers=40
*
*       To set a variable named 'debug' in the module named 'test_module'
*
*               set test_module:debug = 0x13
set c2audit:audit_load = 1