11-10-2009
We have eliminated slow syncing of mirrors because there aren't any mirrors.
We have eliminated wrong parameters to "newfs" or "extendfs" because LVM and "bdf" agree.
The usual reason for this discrepancy is that a program or user is deleting files which are open by an application which is still running. Usually in this circumstance "bdf" is right and "du" is wrong.
There are other possible reasons like embryonic files.
Do you get the disc space back after a reboot or application recycle perhaps?
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vgsync(1M) vgsync(1M)
NAME
vgsync - synchronize stale logical volume mirrors in LVM volume groups
SYNOPSIS
vg_name ...
Remarks
This command requires the installation of the optional HP MirrorDisk/UX software, which is not included in the standard HP-UX operating
system.
If the volume group input arguments belong to a combination of volume groups version 1.0 and 2.0 or higher, the arguments may not be pro-
cessed in the order they are listed on the command line.
DESCRIPTION
The command synchronizes the physical extents of each mirrored logical volume in the volume group specified by vg_name .... Synchroniza-
tion 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 command.
Arguments
recognizes the following argument:
vg_name The path name of a volume group.
EXTERNAL INFLUENCES
Environment Variables
determines the language in which messages are displayed.
If is not specified or is null, it defaults to "C" (see lang(5)).
If any internationalization variable contains an invalid setting, all internationalization variables default to "C" (see environ(5)).
EXAMPLES
Synchronize the mirrors on volume group
WARNINGS
It is not advisable to interrupt a process.
SEE ALSO
lvsync(1M), vgchange(1M), vgdisplay(1M).
Requires Optional HP MirrorDisk/UX Software vgsync(1M)