SPARC: How to Boot a System to Run Level S (Single-User Level)

Use this procedure to boot a system that is currently at run level 0 to run level S. This run level is used for system maintenance tasks, such as backing up a file system.

1. Boot the system to run level S.

   ok boot -s

2. Type the superuser password when the following message is displayed:

   SINGLE USER MODE Root password for system maintenance (control-d to bypass): xxxxxx

3. Verify that the system is at run level S.

   # who -r

4. Perform the maintenance task that required the run level change to S.

5. After you complete the system maintenance task, type Control-D to bring the system to the multiuser state.

Example 12–2 SPARC: Booting a System to Run Level S (Single-User Level)

The following example displays the messages from booting a system to run level S.

ok boot -s
Resetting ...

Sun Ultra 2 UPA/SBus (2 X UltraSPARC-II 296MHz), No Keyboard
OpenBoot 3.25, 512 MB memory installed, Serial #10342381.
Ethernet address 8:0:20:xx:cf:ed, Host ID: 80xxcfed.

Rebooting with command: boot -s
Boot device: /sbus@1f,0/SUNW,fas@e,8800000/sd@a,0:a  File and args: -s
SunOS Release 5.11
Copyright 1983-2007 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms
WARNING: consconfig: cannot find driver for screen device /SUNW,ffb@1e,0

Root password for system maintenance (control-d to bypass):
svc.startd: Returning to milestone all.
NIS domain name is boulder.Central.Sun.COM
/dev/rdsk/c0t10d0s7 is clean
Reading ZFS config: done.
dancehallgirl console login: