How to Specify Next Volume Directory in Unrar

When extracting multi-volume RAR archives, the unrar utility expects all parts to reside in the same folder by default. Because the command-line version of unrar lacks a dedicated startup flag to define a secondary search path for subsequent volumes, handling split archives across different locations requires either responding to the interactive runtime prompt, piping the path through standard input for automation, or unifying the locations using symbolic links. This guide details how to implement each method cleanly.

Method 1: Use the Interactive Prompt

If unrar cannot locate the next volume (such as .part2.rar or .r01) in the current working directory, extraction halts and it prompts you to provide the location.

Start extracting the first volume:

unrar x /path/to/first_part/archive.part01.rar

When the initial volume finishes extracting, unrar outputs a prompt similar to:

Cannot find volume: archive.part02.rar
Insert disk with this volume and press Enter, or enter the new path:

Type the absolute or relative path to the directory containing the requested volume (or the full path to the file itself) and press Enter.

unrar will switch to the specified directory and continue processing from there.

Method 2: Automate with Standard Input Piping

If you run unrar inside an automated script and cannot manually respond to the prompt, pipe the directory path into the command using echo or printf.

printf "/path/to/subsequent_volumes/\n" | unrar x /path/to/archive.part01.rar

When unrar finishes the first file and requests the next volume, it reads the path directly from stdin without interrupting script execution. If you have volumes scattered across more than two directories, provide each directory on a new line:

printf "/path/to/part2/\n/path/to/part3/\n" | unrar x /path/to/archive.part01.rar

Method 3: Consolidate with Symbolic Links (Recommended)

The most reliable approach to avoid extraction failures or halted scripts is to link all multi-volume files into a single temporary directory before calling unrar.

Create a temporary staging folder:
```
mkdir /tmp/rar_staging
```

Create symbolic links to all volumes:

ln -s /path/to/dir1/archive.part01.rar /tmp/rar_staging/
ln -s /path/to/dir2/archive.part02.rar /tmp/rar_staging/
ln -s /path/to/dir3/archive.part03.rar /tmp/rar_staging/

Extract from the staging directory to your target destination:

unrar x /tmp/rar_staging/archive.part01.rar /target/output/dir/

Remove the staging directory once extraction completes:
```
rm -rf /tmp/rar_staging
```

Because all volume links reside in the same folder, unrar detects and processes each subsequent volume automatically.