Extracting files from corrupted tape


 
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Old 03-28-2008
Extracting files from corrupted tape

I've got a backuptape in cpio format that was accidentally overwritten with a very small batch file. As I assume that the cpio header has been overwritten, I cannot extract files from the backup in the conventional manner:

( cpio -itv </dev/rct0
cpio: this is not a cpio file, bad header)

I've tried dd if=/dev/rct0 of=output which has produced a single large file The cpio actually records the contents of three directories. As these are large I'm hoping that I can recover data from the second and third directories.

Is there a specific dd expression (or any other expression) that I can use to strip out the contents ?

All suggestions appreciated. Thanks.

Martin
 
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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)