NAME

vgsync − synchronize stale logical volume mirrors in one or more volume groups

SYNOPSIS

/etc/vgsync volume_group_name ... 

REMARKS

This software requires installation of optional LVM MIRRORING software (not included in the standard HP-UX operating system) before it can be used. 

DESCRIPTION

The vgsync command synchronizes the physical extents in each mirrored logical volume in the volume group specified by volume_group_name. Synchronization occurs only on the physical extents that are stale mirrors of the original logical extent. 

The synchronization process can be time consuming, depending on the hardware characteristics and the amount of data.  Unless disabled, the mirrors within a volume group are synchronized automatically when the volume group is activated by the vgchange -a y command. 

EXTERNAL INFLUENCES

Environment Variables

LANG determines the language in which messages are displayed. 

If LANG is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of LANG. 

If any internationalization variable contains an invalid setting, vgsync behaves as if all internationalization variables are set to "C".  See environ(5).

EXAMPLES

Synchronize the mirrors on volume group /dev/vg04:

vgsync /dev/vg04

SEE ALSO

lvsync(1M), vgchange(1M), vgdisplay(1M). 

Hewlett-Packard Company  —  HP-UX Release 9.03: April 1994