(tar)Matching Format Parameters

Comparing Archives Members with Files

Basic tar Operations

Matching the Format Parameters
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   Some format parameters must be taken into consideration when
modifying an archive:

   Compressed archives cannot be modified.

   You have to specify the block size of the archive when modifying an
archive with a non-default block size.

   Multi-volume archives can be modified like any other archive.  To add
files to a multi-volume archive, you need to only mount the last volume
of the archive media (and new volumes, if needed).  For all other
operations, you need to use the entire archive.

   If a multi-volume archive was labeled using `--label=ARCHIVE-LABEL'
(`-V ARCHIVE-LABEL') (
FIXME: pxref Archive Label
   ) when it was created, `tar' will not automatically label volumes
which are added later.  To label subsequent volumes, specify
`--label=ARCHIVE-LABEL' (`-V ARCHIVE-LABEL') again in conjunction with
the `--append' (`-r'), `--update' (`-u') or `--concatenate' (`-A')
operation.
FIXME: example

FIXME: xref somewhere, for more information about format parameters.