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A file archiver is computer software which brings together a group of files into a single archive file. An archive file is therefore a collection of files and directories that are stored in one file. There are many advantages of storing multiple files this way. For example, an archive is a great way to store backup data, transfer files to another directory, or to a different computer. Archive files are often compressed to save disk space and reduce transfer times.
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This type of utility lets users compress, decompress, and archive files and directories. Most archivers also store additional metadata such as user and group permissions, timestamps, and directory structures. Other features often found in archive managers include support for multiple volumes, encryption, Unicode names, password protection, and integration into the shell.
Linux has a good range of open source archive managers, both console based (such as tar) or sporting an attractive graphical user interface and integrating with a desktop environment.
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find $ptn | egrep -v "$(cat tarX_$ptn)" | afio -z -Z -P bzip2 -v -T 3k | -o {workdir}/${now}_${f}.afio > ${workdir}/${now}_${f}.log 2>&1
It's like a better cpio. Unlike tar, you can have corrupted files within, and still get the rest.