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OpenVMS Hobbyist Program | Alpha Systems Forums | Alpha Hardware Forum
Author Grab OpenVMS Save Set from Tape in Linux/Win?

Posts: 6
Joined: 28.10.10
Posted on October 31 2010 13:55
(I wasn't sure which section to post this in so I decided to put it here)

I have a few OpenVMS backup tapes which contain save sets (.bck) created by the BACKUP tool. Unfortunately, I do not have access to a physical OpenVMS system to read and restore them. I do however have FreeAXP... but from my understanding you can't connect physical hardware to it.

What I'm hoping to do is someone pull the .bck off the tape drive and transfer it to FreeAXP to restore it.

I did some research and came across this page:

It talks about how to use Linux's DD to grab files off a VMS tape created with the COPY command. Would I be able to use this method to grab the .bck file even though the tapes were created with the Backup tool? Is this even possible?
Author RE: Grab OpenVMS Save Set from Tape in Linux/Win?

Posts: 6
Joined: 28.10.10
Posted on November 02 2010 15:28
So I ended up trying vmsbackup and it wasn't what I needed. Instead of allowing me to pull the .bck from the tape, it would extract files within the saveset. So I instead tried DD.

This is what i discovered:

Openvms saveset tapes have essentially two files on them:
1) The tape header
2) The .bck

You skip the header file on the tape by using the Linux command:
mt -f /dev/yourtapedrive fsf

Now that you are positioned at the .bck file, dd it directly off the tape.
dd if=/dev/yourtapedrive bs=8192(i used the tape blocksize) of=/where_you_want_it_to_go/saveset.bck

I next made an iso with imgburn and so it could be mounted in FreeAXP. A MAJOR note is at some step in the process the saveset's file attributes are lost. Unless these are restored backup will not accept the file. But not to fear! You can restore them using the HP freeware tool @RESET_BACKUP_SAVESET_FILE_ATTRIBUTES.COM.

http://h71000.www7.hp.com/openvms/freeware/backup.html (information on OpenVMS tapes and DD)
http://tldp.org/HOWTO/VMS-to-Linux-HOWTO/x838.html (HP reset saveset file attributes tool)
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