AIX : Create LV with poor man stripe Post: 302417557

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Homework and Emergencies Emergency UNIX and Linux Support AIX : Create LV with poor man stripe Post 302417557 by zxmaus on Friday 30th of April 2010 03:17:12 AM

04-30-2010

Moderator

Hi,

why would you even possibly want a non-relocatable VG ? I don't think you can change it ...

Code:

mklv -y'<name_of_lv>' -t'jfs2' -x'<max_pp_in_lv>' rootvg <size_of_lv_in_pp>

where <max_pp_in_lv> is the size you want the lv to maximum grow to and <size_of_lv_in_pp> is the size you want it to be now. You can later extend a filesystem residing in this lv just with chfs up to the size of max without first growing the lv. It would be automatically spread (poor man striped) across all disks CURRENTLY in your volumegroup. If you later add more disks to your vg, than this lv would remain spread across the disks you have now as long as you don't run a reorg command - any newly created lv's would be spread across the new amount of disks.

If you want afterwards to create a filesystem within this created lv than you would do it i.e. like this (I assume an inline log, that you want it auto mounted after a system boot and rbrw mounted in my sample):

Code:

crfs -v jfs2 -d'<name_of_lv>' -m'<mountpoint>' -p'rw' -A yes -a options='rbrw' -a logname='INLINE'

This filesystem would have the size <size_of_lv_in_pp> from the mklv command.

Hope this helps
kind regards
zxmaus

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userformat

USERMOUNT(1)						      General Commands Manual						      USERMOUNT(1)

NAME

       usermount - A graphical tool to mount, unmount and format filesystems.

SYNOPSIS

       usermount [ options ]

       userformat [ options ] device

DESCRIPTION

       usermount is a graphical tool to allow users to easily manage removable media, such as floppy disks or zip disks.  When the tool starts up,
       it scans /etc/fstab for all filesystems that have been configured to allow users to mount and unmount them.  The filesystem can be  mounted
       or unmounted by pressing the toggle button labeled Mount.

       Also,  if  the user has the appropriate permissions for the device, the Format button will be active.  This allows the user to format disks
       using fdformat and create a new filesystem of the type listed (using mkfs with the  appropriate	option).   Naturally,  the  user  will	be
       prompted for confirmation before actually destroying data on the device.

       Note that if a device is already mounted, the format button is inactive for all entries that share the same device.

       When run as root, usermount displays all of the entries in /etc/fstab rather than just the ones with the user option.

       Invoking userformat device allows formatting device, as if by selecting device in the userformat window, and by clicking the Format button.

OPTIONS

       This program has no command line options of it's own, but it does take the standard X program options like -display and such.  See the X(1)
       man page for some of the common options.

FILES

       /etc/fstab		The system file describing the mountable filesystems.

SEE ALSO

       mount(8), fdformat(8), mkfs(8), fstab(5) X(1)

BUGS

       Mount entries with a filesystem type of iso9660 are outright considered CD-ROMs and the format button is always disabled.

       Mount entries for swap files or partitions are also ignored.  A nice feature might be to allow root to turn swap on and off for swap parti-
       tions.

AUTHOR

       Otto Hammersmith <otto@redhat.com>

Red Hat 							   March 13 2007						      USERMOUNT(1)

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