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Full Discussion: Reducing / on rootvg
Operating Systems AIX Reducing / on rootvg Post 303018379 by rbatte1 on Tuesday 5th of June 2018 07:03:33 AM
Old 06-05-2018
Not a straightforward fix, I'm afraid. I don't think you can reduce the filesystem in a simple way. If it is in-use, then there is pretty much no chance.

I've done this on Linux and it's messy. I ended up having to boot from media and forcing it from there, but I can't remember if AIX let's you do that anyway. If I was to be faced with this on AIX, then I would have two options but both of them are effectively Disaster Recovery options:-
An alternate to the first one might be to use savevg & restvg whilst adjusting the LV description file, but it's essentially the same.

They are pretty serious and obviously requires a chunk of down-time (as does the way I did with Linux) however you might be able to use one of these methods to clone your server to alternate hardware (or LPAR) and attach the application/data disks to it.


I'm sorry, but it's not a nice place to be.



When you say that you want to migrate hd10opt, may I ask why? I would hope that this is mirrored, or has someone managed to remove the mirrors to give themselves lots of free space to grow in to? Are these real, local disks? If they are virtualised by something, does that protect you against hardware failure? It might be, but that can be done wrong too.

Can you share the output from:-
Code:
lsvg -p rootvg
lsvg -l rootvg
lspv -l hdisk0    (and hdisk1)
lscfg -vl hdisk0


Thanks, in advance,
Robin
 

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BOOTCDBACKUP(1) 						   bootcd utils 						   BOOTCDBACKUP(1)

NAME
bootcdbackup - create a bootable offline backup of a unix system SYNOPSIS
bootcdbackup [-i] [-v] [-s] [-c <config directory>] [-url <url] [-nomount] [-2diskconf <file>] <dev> <name> <builddir> DESCRIPTION
bootcdbackup creates a offline backup from a installed system. You need a running bootcd to boot the system with. This CD/DVD is booted on the system and bootcdbackup creates a bootable CD/DVD with the bootcd kernel and the backup disk as tar-file. To restore or clone the system, boot the CD/DVD image and install it with bootcd2disk -c <name> on the system. bootcdbackup can try to discover the disk partition by searching for fstab on the given partition. A other way to backup the partition ta- ble is the program bootcdmk2diskconf which creates a configuration file on a running system. OPTIONS
-i The bootcdbackup runs in interactive mode and you can run each function manually. This option is useful for debugging. -v The option "-v" (verbose) adds messages on running. -s This option can be used to disable interactive questions and to try to ignore errors. -c <config directory> The configuration directory which includes the file "bootcdbackup.conf", default is "/etc/bootcd". -url <url> If bootcdbackup is slow on your system (because of a slow CD/DVD drive or the HP ILO virtual CD interface), you can use an image server to get the image from. bootcdbackup use the SWAP partition of your upcoming system as temporary space and copy the image from the configured image server to this partition and use it as image. The image server url is configured with this option. -nomount The target disk should not be mounted and no search for fstab is done. --cpio Normally as backup tool star will be used if selinux files have to be backed up and cpio will be used if not. With this option the usage of cpio can be forced. --star Normally as backup tool star will be used if selinux files have to be backed up and cpio will be used if not. With this option the usage of star can be forced. -2diskconf <file> The parameter configures a bootcd2disk.conf for the restore of the system done by bootcd2disk. The configuration file can be created with the command bootcdmk2diskconf. <dev> Configures the device where bootcdbackup finds the file "fstab" and discover the configuration for the restore. <name> The name of the backup (no blanks!) is used on the creation time and to restore the backup with bootcd2disk -c <name>. <builddir> Builddir is an directory on the backup system where bootcdbackup build the backup CD/DVD. Space for the CD/DVD image, for compression and the data is needed! All other configuration has to be done in the config files. FILES
/etc/bootcd/bootcdbackup.conf Configuration for bootcdbackup. SEE ALSO
Documentation in bootcdbackup.conf bootcdbackup.conf(5), bootcd(1), bootcdflopcp(1), bootcdwrite(1) AUTHOR
This manual page was written by Bernd Schumacher <bernd.schumacher@hp.com> and Carsten Dinkelmann <Carsten.Dinkelmann@foobar-cpa.de> for the Debian GNU/Linux system (but may be used by others). bootcdbackup 2007-07-05 BOOTCDBACKUP(1)
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