AIX & TAR related stuff Post: 302772197

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Operating Systems AIX AIX & TAR related stuff Post 302772197 by bakunin on Sunday 24th of February 2013 09:10:17 AM

02-24-2013

Registered User

Quote:

Originally Posted by MichaelFelt

but it used to be if you restored a file using tar all the zero bytes that are not on disk actually get written to the "tape" AND these zero bytes get restored. (so called sparse files getting backed up and restored as "full" files.

This is true. From the AIX 6.1 manual:

Quote:

tar does not preserve the sparse nature of any file that is sparsely allocated. Any file that was originally sparse before the restoration will have all space allocated within the filesystem for the size of the file.

IMHO "tar" is a good device to bundle some files up to an archive. If one wants to bundle the source files for a software project or to create a snapshot of ones HOME-directory it is a tool worth considering. "tar" plays in the same league as "cpio", "pax" and probably some other tools, "backup" among them.

As Michael hinted at "tar" is platform-independent to a quite unparalleled degree. This is as much an advantage as it is a limiting factor because of some limitations. And for system-wide backups i would use "mksysb" and "savevg" solely under AIX - neither "tar" nor any of the other aforementioned programs.

Just my 2 cents.

bakunin

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LEARN ABOUT OSF1

dxarchiver

dxarchiver(8)						      System Manager's Manual						     dxarchiver(8)

NAME

       dxarchiver - Archives and restores files to and from disk and tape devices

SYNOPSIS

       /usr/bin/X11/dxarchiver

OPTIONS

       The  Archiver  application  accepts  all of the standard X Toolkit command line options, which are documented in the OPTIONS section in the
       X(1X) reference page.

DESCRIPTION

       Use the Archiver application, dxarchiver, to: Copy and store multiple files to a single, named archive file or output device such as a tape
       or floppy disk Uncompress incoming archive files and compress newly created files Retrieve stored files from an archive file or device such
       as a tape or floppy disk

       Invoke the Archiver application from the CDE Application Manager from the following categories:

       Application Group:	System_Admin
       System Admin Subgroup:	Daily Admin

FILES

       Defaults that are shared by the GUI and CLI The Archiver application The Archiver help volume  Directory  containing  Archiver  application
       icons Application defaults file that sets the default values for the X resources Archiver message catalog Archiver online help location IDs
       for on-item help i18n_motif_shared_text.cat

	      Message catalog containing application-independent messages i18n_motif_shared_text_LocIds.cat

	      Message catalog containing application-independent location IDs for on-item help

SEE ALSO

       Commands: cpio(1), pax(1), tar(1), X(1X)

       Files: cpio(4), tar(4)

       System Administration

																     dxarchiver(8)