NAME

       vdodumpmetadata - dump the metadata regions from a VDO device

SYNOPSIS

       vdodumpmetadata [--no-block-map] [--lbn=lbn] vdoBacking outputFile

DESCRIPTION

       vdodumpmetadata  dumps  the metadata regions of a VDO device to another file, to enable save and transfer
       of metadata from a VDO without transfer of the entire backing store.

       vdoBacking must be the path of the VDODataLV as described in lvmvdo(7).

       vdodumpmetadata will produce a large output file. The expected size is roughly equal  to  VDO's  metadata
       size. A rough estimate of the storage needed is 1.4 GB per TB of logical space.

OPTIONS

       --no-block-map
              Omit the block map. The output file will be of size no higher than 130MB + (9 MB per slab).

       --lbn  Saves  the block map page associated with the specified LBN in the output file. This option may be
              specified up to 255 times.  Implies --no-block-map.

EXAMPLE

       # lvchange -ay vdo1/vdo0pool_vdata
       # vdodumpmetadata /dev/mapper/vdo1-vdo0pool_vdata vdo1-meta-dump
       # lvchange -an vdo1/vdo0pool_vdata

SEE ALSO

       lvmvdo(7), lvchange(8), vdodebugmetadata(8)

Red Hat                                            2023-03-38                                 VDODUMPMETADATA(8)