---
name: "vdodumpmetadata"
section: "8"
platform: "linux"
package: "vdo"
version: "8.3.1.1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/vdodumpmetadata"
---

# vdodumpmetadata(8)

dump the metadata regions from a VDO device

## 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)](/lvmvdo/7.md).

**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)](/lvmvdo/7.md), [**lvchange**(8)](/lvchange/8.md), [**vdodebugmetadata**(8)](/vdodebugmetadata/8.md)