Logical Volume Manager question Post: 24556

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Top Forums UNIX for Advanced & Expert Users Logical Volume Manager question Post 24556 by Perderabo on Sunday 14th of July 2002 09:43:03 PM

07-14-2002

Administrator Emeritus

I do not understand how simply making a recovery tape could cause such a disaster. Did you try to run that tape? If you simply were running make_recovery and this happened I think that it was coincidence and you actually have some other problem.

But in any event, after a disaster like this, vgscan is the way I would proceed. First I would "cp /etc/lvmtab /etc/lvmtab.save". Then I would run "vgscan -pv" and see if it looks reasonable. As long as you use -p nothing will actually change. If it looks good (or at least better than the current state), I would run "pvscan -v". It may tell you to run other programs next like vgchange. Follow the instructions the vgscan gives you. Good luck.

Perderabo

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vgscan

VGSCAN(8)                                                     System Manager's Manual                                                    VGSCAN(8)

NAME

       vgscan - scan all disks for volume groups and rebuild caches

SYNOPSIS

       vgscan [-d|--debug] [-h|-?|--help] [--ignorelockingfailure] [--mknodes] [-P|--partial] [-v|--verbose]

DESCRIPTION

       vgscan  scans all SCSI, (E)IDE disks, multiple devices and a bunch of other disk devices in the system looking for LVM physical volumes and
       volume groups.  Define a filter in lvm.conf(5) to restrict the scan to avoid a CD ROM, for example.

       In LVM2, vgscans take place automatically; but you might still need to run one explicitly after changing hardware.

OPTIONS

       See lvm for common options.

       --mknodes
              Also checks the LVM special files in /dev that are needed for active logical volumes and creates any missing ones and removes unused
              ones.

SEE ALSO

       lvm(8), vgcreate(8), vgchange(8)

Sistina Software UK                                      LVM TOOLS 2.02.95(2) (2012-03-06)                                               VGSCAN(8)