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Restoring a SYSBACK backup from TSM using NIM

  • 1.  Restoring a SYSBACK backup from TSM using NIM

    Posted Thu November 22, 2007 11:53 AM

    Originally posted by: SystemAdmin


    Hi All,
    I've been experimenting with restoring a SYSBACK backup from TSM using my NIM server and have successfully restored an AIX 5.2 ML04 system that I backed up with SYSBACK when I use exactly the same OS/Maintenance level NIM resources (lpp_spource and spot) during the restore. However, if I try to do the restore using lpp_source and spot resources that are a slightly higher maintenance level (AIX 5.2 ML07 for example) the restore goes OK but it then tries to update the restored system from the higher level lpp_source and fails because it says it can't expand /usr. It then reboots and fails on LED 0554 and a message of "unknown bootdisk" If I don't allocate the lpp_source resource from the NIM server and only allocate the spot, it naturally can't access the lpp_source so doesn't try to update anything but when it reboots after the restore it still hangs with LED 0554 and the LED message "Unknown bootdisk".
    I can perform a maintenance boot from the NIM server, access rootvg OK and can rebuild the boot logical volume but it still fails to boot with the same error.
    I normally use mksysb for backups and then use my NIM server to restore the mksysb images. That works fine and if I allocate higher maintenance level NIM resources, the restored system then gets updated to the level of the lpp_source. If I don't allocate an lpp_source, only a spot, then the mksysb is restored and stays at exactly the same level (which is what we want for frozen backlevel systems). As long as I use a NIM spot resource that is at least the same level as the mksysb backup image, it always works so I normally use the highest available spot I've got when doing a restore.
    I would have hoped that SYSBACK would allow me to do the same but when I build the SYSBACK boot image on the NIM server it wants me to specify both an lpp_source AND a spot resource. This means that I have to know the exact oslevel including maintenance level that a SYSBACK backup was taken at and then build a spot and lpp_source to match so that the restore doesn't try to update anything.
    This doesn't seem very flexible but I'm new to SYSBACK and have never used it till now so am I missing something?


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