ITEM: JH7604L

LIBRARY: Sysback ramfs HOWTO

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        HOWTO: Increase RAMFS size for most versions of sysback.
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Table of Contents

A.      Machine Selection for Process
B.      File Selection for Process
C.      Make the necessary changes
D.      Build the appropriate boot image
D.1     Network Boot Image configuration
D.2     Recreate Full System Backup
D.3     Create a Boot Tape without data
D.4     Bare Install to create Boot Tape without Data


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SECTION A: Machine Selection for Process
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                                                                12/08/1998
For local tape backups, or sysback v4 remote tape backups:
        Login as root on the client/source machine.

For sysback v3 to remote tape backups:
        Login as root on the server machine.


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SECTION B: File Selection for Process
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`cd /usr/sbin`

For sysback v4.1.4 or earlier
        `cp mkboottape mkboottape.org`
        `vi mkboottape`

For sysback v4.2.0 and later
        `cp mkboottape.sh mkboottape.sh.org`
        `vi mkboottape.sh`


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SECTION C: Make the necessary changes
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For sysback v4.1 or later
        Search on RAMFS.
        You will see the following:

        RAMFS=16384 \# AIX 4.1 = 8MB
        [ ${VER}$REL -eq 42 ] && RAMFS=20480 \# AIX 4.2 = 10MB
        [ ${VER}$REL -ge 43 ] && RAMFS=24576 \# AIX 4.3 = 12MB

For sysback v3.x
        Search on "sed" until you find the following:

        sed "s/ $blocks/ 16384/" > /tmp/$proto
    
Change the value for your version by adding 4096 or more as necessary.

Save and exit vi


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SECTION D: Build the appropriate boot image
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Choose the correct option below to enable the changes you have made.

Once the following steps have been followed, restore your system
from the "Installation and Maintenance MAIN MENU" per sysback manual.

Option 1: Network Boot Image configuration
        smitty sysback
          Configuration Options
            Network Boot Configuration
              Update Network Boot Image
                Try network boot again

Option 2: Recreate Full System Backup
        Create your Full system backup again if possible
        Boot and restore from your new backup as necessary

Option 3: Create a Boot Tape without data
        Insert a blank tape into the tape drive
        Create a sysback boot tape
          smitty sysback
            Utilities
              Create a Bootable Tape (without data)

        Boot from your newly created tape.

        Once the system is up in service mode and you see the sysback menus,
        remove the boot tape and insert the backup tape.

Option 4: Bare Install to create Boot Tape without Data
        boot and install the system from AIX media matching the
          version in your sysback backup
        once up in normal mode, install any additional device drivers
          as required (ssa, graphics, etc.)
        Install sysback package of the same version as used to create
          the backup tape

        Insert a blank tape into the tape drive
        Create a sysback boot tape
          smitty sysback
            Utilities
              Create a Bootable Tape (without data)

        Boot from your newly created tape.

        Once the system is up in service mode and you see the sysback menus,
        remove the boot tape and insert the backup tape.

Response:

Closing with Customer Approval



Support Line: LIBRARY: Sysback ramfs HOWTO ITEM: JH7604L

Dated: December 1998 Category: N/A

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