mksysb file packing


 
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Operating Systems AIX mksysb file packing
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Old 01-25-2007
mksysb file packing

Hi,

I have a tape made with mksysb on an AIX machine that will not restore, the system is dead to the point of needing an op sys reload.

I am trying to restore some critical data files and can read the tape image with dd on another system (SCO). I have worked out the file headers enough to bring off the files from the backup, but mksysb has packed (compressed) files with any great size.

Does anyone know what packing algorithm is used so I can unpack the files ? its not standard pack or compress from what I can tell.

Any help greatfully received !

Thanks.
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aset.restore(1M)					  System Administration Commands					  aset.restore(1M)

NAME
aset.restore - restores system files to their content before ASET is installed SYNOPSIS
aset.restore [-d aset_dir] DESCRIPTION
aset.restore restores system files that are affected by the Automated Security Enhancement Tool (ASET) to their pre-ASET content. When ASET is executed for the first time, it saves and archives the original system files in the /usr/aset/archives directory. The aset.restore utility reinstates these files. It also deschedules ASET, if it is currently scheduled for periodic execution. See asetenv(4). If you have made changes to system files after running ASET, these changes are lost when you run aset.restore. If you want to be abso- lutely sure that you keep the existing system state, it is recommended that you back-up your system before using aset.restore. You should use aset.restore, under the following circumstances: You want to remove ASET permanently and restore the original system (if you want to deactivate ASET, you can remove it from schedul- ing). You are unfamiliar with ASET and want to experiment with it. You can use aset.restore to restore the original system state. When some major system functionality is not working properly and you suspect that ASET is causing the problem; you may want to restore the system to see if the problem persists without ASET. aset.restore requires root privileges to execute. OPTIONS
The following options are supported: -d aset_dir Specify the working directory for ASET. By default, this directory is /usr/aset. With this option the archives directory will be located under aset_dir. FILES
/usr/aset/archives archive of system files prior to executing aset ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWast | +-----------------------------+-----------------------------+ SEE ALSO
aset(1M), asetenv(4), attributes(5) System Administration Guide: Basic Administration SunOS 5.10 11 Oct 1991 aset.restore(1M)