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

# vdodebugmetadata(8)

load a metadata dump of a VDO device

## NAME

vdodebugmetadata - load a metadata dump of a VDO device

## SYNOPSIS

**vdodebugmetadata** \[**--pbn=*pbn*** ...\] \[**--searchLBN=*lbn*** ...\] *filename*

## DESCRIPTION

**vdodebugmetadata** loads the metadata regions dumped by **vdodumpmetadata**. It should be run under GDB, with a breakpoint on the function doNothing.

Variables vdo, slabSummary, slabs, and recoveryJournal are available, providing access to the VDO super block state, the slab summary blocks, all slab journal and reference blocks per slab, and all recovery journal blocks.

Please note that this tool does not provide access to block map pages.

## OPTIONS

- \--pbn

  Print the slab journal entries for the given PBN. This option may be specified up to 255 times.

- \--searchLBN

  Print the recovery journal entries for the given LBN. This includes PBN, increment/decrement, mapping state, recovery journal position information, and whether the recovery journal block is valid. This option may be specified up to 255 times.

## SEE ALSO

**vdo**(8), **[vdodumpmetadata(8)](/vdodumpmetadata/8.md).**