Changes between Version 6 and Version 7 of Rebooting Sun Hosts


Ignore:
Timestamp:
04/13/06 16:06:46 (20 years ago)
Author:
cdelarcuz
Comment:

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  • Rebooting Sun Hosts

    v6 v7  
    1111
    1212=== If host has a front panel 'button' ===
    13 (ie. all SunBlades and all Ultras except for Ultra-1's)
    14    then to reboot safely:
     13(ie. all SunBlades and all Ultras except for Ultra-1's) then to reboot safely:
    1514
    16    Push and let go quickly the lit button on the front panel.  The
    17    screen will go black.  About a minute or two later, the screen will
    18    light up, a message about syncing the disks will be displayed and
    19    then the cpu box will be powered off.
     15Push and let go quickly the lit button on the front panel.  The
     16screen will go black.  About a minute or two later, the screen will
     17light up, a message about syncing the disks will be displayed and
     18then the cpu box will be powered off.
    2019
    21    After a moment, check that the light in or near the front panel
    22    button is off.  Then push and let go quickly the button.  The host
    23    will boot back up.
     20After a moment, check that the light in or near the front panel
     21button is off.  Then push and let go quickly the button.  The host
     22will boot back up.
    2423       
    25         NOTE: Host lakme in Room 1325 has a hardware problem and this
    26               does not work on that host.
    27         NOTE: If the 'safe' reboot doesn't work, the last resort is
    28               to hold in the 'button' about 4 seconds or more until the
    29               cpu box powers off (light is out).  If that fails, then
    30               unplug the cpu box.
     24 * NOTE: Host lakme in Room 1325 has a hardware problem and this
     25         does not work on that host.
     26 * NOTE: If the 'safe' reboot doesn't work, the last resort is
     27         to hold in the 'button' about 4 seconds or more until the
     28         cpu box powers off (light is out).  If that fails, then
     29         unplug the cpu box.
    3130
    32    *See below for errors that occur when the 'safe' reboot isn't possible.*
     31 * See below for errors that occur when the 'safe' reboot isn't possible.
    3332
    3433       
    35 2. If host has no front panel 'button' (ie. Ultra-1     attila, isolde, lucia
    36                                             SPARCtation-10      odyssey
    37                                             SPARCstation-5      doncarlo )
    38    then to reboot safely:
    39 
     34=== If host has no front panel 'button' ===
     35(ie. Ultra-1: attila, isolde, lucia.
     36SPARCtation-10: odyssey. 
     37SPARCstation-5: doncarlo)
     38Then to reboot safely:
     39{{{
    4040   Hold down 'Stop' key and the 'a' key.  This will display the okay prompt:
    4141                OK>
    … …  
    5757
    5858   *See below for errors that occur when the 'safe' reboot isn't possible.*
    59 
    60 
     59}}}
    6160== Is A Reboot Necessary? ==
    6261
    63 Most Sun hosts act as data disk servers, some also as home directory
    64 servers and others as mail, print, web, and software servers.
     62 * Most Sun hosts act as data disk servers, some also as home directory
     63   servers and others as mail, print, web, and software servers.
    6564
    66 As the Sun systems are interdependent, they are ideally always up and
    67 running with all disks mounted.  Rebooting should be a last resort.
     65 * As the Sun systems are interdependent, they are ideally always up and
     66   running with all disks mounted.  Rebooting should be a last resort.
    6867
    69 Below are guidelines on how to avoid a reboot/poweroff of a Sun host.
    70 See guidelines for doing a 'safe' reboot/poweroff above.
     68 * Below are guidelines on how to avoid a reboot/poweroff of a Sun host.
     69   See guidelines for doing a 'safe' reboot/poweroff above.
    7170
    72 How to avoid a reboot:
     71== How to avoid a reboot ==
    7372
    74 1. Keep a 'console' window open.  All system error messages are
     73 * Keep a 'console' window open.  All system error messages are
    7574   displayed in the console window.  (In CDE's menu, select HOSTS -->
    7675   Terminal Console )
    7776
    78 2. Check the messages in the console window.  If they include:
     77 * Check the messages in the console window.  If they include:
    7978        ... server SOME_HOST not responding ...
    8079   then your host is likely just waiting on another host that is
    … …  
    8382   can work without that remote host.
    8483
    85    If the console messages include:
     84 * If the console messages include:
     85{{{
    8686        ... server SOME_HOST_X not responding ...
    8787        ... server SOME_HOST_Y not responding ...
    … …  
    8989   then there is likely a network problem and rebooting will not help.
    9090   Get in touch with the system manager.
    91 
    92 3. If your console session is hung or frozen and there are no
     91}}}
     92 * If your console session is hung or frozen and there are no
    9393        ... server SOME_HOST not responding ... 
    9494    messages, then try to kill the session from another host:
     95{{{
    9596                > ssh -l your_username  your_hostname
    9697                > psallw | grep ksh
    … …  
    99100                                                        /usr/dt/bin/Xsession
    100101                > kill  9561            (PID# for your Xsession 'ksh' process)
    101    
    102 
     102}}}
    103103== Likely Errors After 'Unsafe' Reboot/Power Off ==
    104104
    105105   These occur when the 'safe' reboot/poweroff described above was
    106106   not possible.
    107 
     107{{{
    108108        Disk .../dev/dsk/c0t0d0s0... not OKAY
    109109
    … …  
    113113   'fsck' on that disk.  If no one is available to use the root
    114114   account, the disk and, possibly the host, will remain off line.
     115}}}