# phpman > man > cache_repair(8)

[cache_repair(8)](https://www.chedong.com/phpMan.php/man/cacherepair/8/markdown)                        System Manager's Manual                       [cache_repair(8)](https://www.chedong.com/phpMan.php/man/cacherepair/8/markdown)



## NAME
       **cache**___**repair** - repair cache binary metadata from device/file to device/file.

## SYNOPSIS
       **cache**___**repair** [_options_] **-i** {device|file} **-o** {device|file}

## DESCRIPTION
       **cache**___**repair**  reads binary cache metadata created by the respective device-mapper target from
       one device or file, repairs it and writes it to another device or file. If written to a meta‐
       data device, the metadata can be processed by the device-mapper target.

       This tool cannot be run on live metadata.

## OPTIONS
### -h, --help
              Print help and exit.

### -V, --version
              Print version information and exit.

### -i, --input {device|file}
              Input file or device containing binary metadata.

### -o, --output {device|file}
              Output file or device for repaired binary metadata.

           If a file is then it must be preallocated, and large enough to hold the
           metadata.


## EXAMPLE
       Reads  the binary cache metadata from file metadata, repairs it and writes it to logical vol‐
       ume /dev/vg/metadata for further processing by the respective device-mapper target:

           $ cache_repair -i metadata -o /dev/vg/metadata


## DIAGNOSTICS
       **cache**___**repair** returns an exit code of 0 for success or 1 for error.

## SEE ALSO
       **cache**___**[dump**(8)](https://www.chedong.com/phpMan.php/man/dump/8/markdown), **cache**___**[check**(8)](https://www.chedong.com/phpMan.php/man/check/8/markdown), **cache**___**[restore**(8)](https://www.chedong.com/phpMan.php/man/restore/8/markdown)

## AUTHOR
       Joe Thornber <<ejt@redhat.com>>, Heinz Mauelshagen <<HeinzM@RedHat.com>>



System Manager's Manual                  Device Mapper Tools                         [cache_repair(8)](https://www.chedong.com/phpMan.php/man/cacherepair/8/markdown)