Re: Correct procedure for restoring system image data

From: Marcelino Mata (mmata_at_MULTIMATIC.COM)
Date: 04/28/04

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    Date:         Wed, 28 Apr 2004 11:13:34 -0400
To: aix-l@Princeton.EDU

    Christopher,

    While migrating to large rootvg disks works fine in certain environments (
    It worked fine on my test computer), it did not work in the server since I
    used 8 MB PP size for the disk. This limits me to 1016 PP's. I need over
    1080 PP's for 9.1Gb disk. If I only used 16MB PP, this would of been so
    easy/simple....oh, well.

    Time for plan B....

    Marcelino

    >-----Original Message-----
    >From: Marcelino Mata
    >Sent: Tuesday, April 27, 2004 4:47 PM
    >To: 'IBM AIX Discussion List'
    >Subject: RE: Correct procedure for restoring system image data
    >
    >
    >Christopher,
    >
    >See response below...
    >
    >>-----Original Message-----
    >>From: cbaker@GOODYEAR.COM [mailto:cbaker@GOODYEAR.COM]
    >>Sent: Tuesday, April 27, 2004 3:45 PM
    >>To: aix-l@Princeton.EDU
    >>Subject: Re: Correct procedure for restoring system image data
    >>Importance: High
    >>
    >>
    >>Marcelino,
    >>
    >>Don't know why it is doing what it is doing, but since you are
    >>back to square-one, may I ask a few questions and make a few
    >>observations:
    >>
    >>1) You can go from AIX 4.3.3 ML9 directly to AIX 5.1. No need
    >>(that I am aware of) to go to ML11 in the interim.
    >>
    >
    >I read it somewhere that AIX 5.1 upgrade can fail if AIX 4.3
    >is not at the last released ML level. IBM performed testing
    >at the lastest ML level so it better practice to start from that level.
    >
    >>2) If you can connect both the 4.5 GB and the 9.1 GB drive at
    >>the same time, you then only need to mirror to the 9.1 then break the
    >>mirror to have your OS drive be the 9.1 GB
    >>
    >
    >I can do this. I did not know that this would work. I
    >thought that if I did this type of thing, the 9.1Gb disk would
    >be "formatted" to be 4.5GB disk. I use the work "formatted"
    >since I don't know the AIX lingo for this type of thing. I
    >manage AIX, Tru64, Solaris and Linux so I can't stay on top of this...
    >
    >>3) We have AIX 5.1 and AIX 5.2 on systems with only a single
    >>4.5 GB drive. If it is only the rootvg and it is only the OS,
    >>it should
    >>fit.
    >>
    >
    >I have no free PP's on the disk now and I'm told a migrated
    >4.3->5.1 requires more space than fresh install of 5.1. There
    >is also a couple filesystems I on the RAID volume group which
    >I want to move to rootvg.
    >
    >
    >>4) Why not use "mksysb" and then clone it back onto the system
    >>after you swap drives? (Assuming you can't do #2 above.)
    >>
    >
    >Do you recommend of mksysb site or can you provide the command
    >line for using myksysb? Sysbackup is idiot proof so I was
    >going to stick to that....I'm open to mksysb is I have run
    >into a Sysbackup bug/limitation. (Suggestion #2 seems like a
    >better idea)
    >
    >>5) You would be very wise to have all other VG's varied-off /
    >>exported and even have the drives off or disconnected so that
    >you don't
    >>screw those up.
    >
    >This was going to be plan B...
    >>
    >>I am guessing that sysbackup restore is only trying to make
    >>the VG definitions in the rootvg / system area and thus will not hurt
    >>other VG's, but I would NOT have the other VG's live or
    >>connected when I was doing this.
    >>
    >
    >I think I will test a few things on spare 43P's before proceeding...
    >
    >>Hope that helped,
    >>
    >>Christopher M. Baker
    >>Senior Technical Support Analyst
    >>DSE/TCO
    >>Goodyear Tire and Rubber Company
    >>
    >>=================================================
    >>Contains Confidential and/or Proprietary Information.
    >>May not be copied or disseminated without the expressed
    >>written consent of The Goodyear Tire & Rubber Company.
    >>=================================================
    >>
    >>
    >>
    >>
    >> Marcelino Mata
    >> <mmata@MULTIMATI To:
    >>aix-l@Princeton.EDU
    >> C.COM> cc: (bcc:
    >>Chris Baker/NA/GDYR)
    >> Sent by: IBM AIX Subject:
    >>Correct procedure for restoring system image data
    >> Discussion List
    >> <aix-l@Princeton
    >> .EDU>
    >>
    >>
    >> 04/27/04 03:01
    >> PM
    >> Please respond
    >> to IBM AIX
    >> Discussion List
    >>
    >>
    >>
    >>
    >>
    >>
    >>I am making preparation to move from AIX 4.3.3ML9 to ML11 then
    >>AIX 5.1. As
    >>I need to perform upgrades, I do not have enough disk space on
    >>the current
    >>4.5Gb O/S disks. I was planning on replacing the 4.5Gb disks
    >>with 9.1Gb
    >>disks. I was going to just use the user friendly program Sysbackup to
    >>accomplish this. I made a system image of the rootvg ONLY and
    >>replaced the
    >>disks. Everything was going fine during the restore until it
    >>informed me
    >>that a volume group was missing and it wanted to know if
    >>sysbackup restore
    >>should create or delete it. The volume group is a 270GB RAID
    >>volume which
    >>are still present in the system but I do not want touched by sysbackup
    >>restore. My guess would be to select the create option and
    >>then it will
    >>continue. As I can not afford to lose time due to errors I
    >>did nothing (put
    >>the old disks back in) until I get clarification on what it
    >>was actually
    >>going to do next. If I select "create", will it continue the restore
    >>without me assigning any filesystem to it or will it force me
    >to assign
    >>something to it before continuing?
    >>
    >>TIA,
    >>
    >>Marcelino
    >>
    >

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