tape listing

[ajay]

On Mon, 18 Jul 2005 Bob McClure Jr wrote :
>On Mon, Jul 18, 2005 at 07:00:55AM -0000, ajay wrote:
> >
> > On Fri, 15 Jul 2005 Rick Stevens wrote :
> > >ajay wrote:
> > >>  hi gurus
> > >>
> > >>i try to list my tape hp 40gb (under compression)
> > >>
> > >>------------------------------------------------------
> > >>[root at tivimtech ajay]# tar vft /dev/st0
> > >>tar: This does not look like a tar archive
> > >>tar: Skipping to next header
> > >>tar: Archive contains obsolescent base-64 headers
> > >>
> > >>-------------------------------------------------------
> > >>
> > >>it do not list anything and gives this error and comes out.
> > >>is there any way i can mount it, if yes what is mount type ?
> > >>
> > >>i use this command to backup:
> > >>i am very sure it does backup as i checked date against backup.log
> > >>it changes everyday and shows latest date time as supposed.
> > >>
> > >># Daily Backup on the Dat
> > >>tar cvfz /dev/st0 /home /data /etc /var/spool/mail /var/www  >/var/log/backup.log &
> > >>
> > >>It is scheduled in cron.
> > >>
> > >>here is some part of this log.....
> > >>
> > >>UW PICO(tm) 4.2                    File: /var/log/backup.log
> > >>
> > >>
> > >>home/
> > >>home/niteen/
> > >>home/niteen/.bash_history
> > >>home/niteen/.addressbook
> > >>home/niteen/.addressbook.lu
> > >>home/niteen/.bash_logout
> > >>home/niteen/.bash_profile
> > >>home/niteen/.bashrc
> > >>home/niteen/.canna
> > >>home/niteen/.emacs
> > >>home/niteen/.esd_auth
> > >>home/niteen/.fetchmailrc
> > >>home/niteen/.fonts.cache-1
> > >>home/niteen/.gtkrc
> > >>home/niteen/.gtkrc-1.2-gnome2
> > >>home/niteen/.ICEauthority
> > >>home/niteen/.mailboxlist
> > >>home/niteen/.pinerc
> > >>home/niteen/.recently-used
> > >>home/niteen/.rhn-applet.conf
> > >>home/niteen/.viminfo
> > >>
> > >>..............................
> > >>
> > >>I am confussed why it says "This does not look like a tar archive" ??
> > >>
> > >>
> > >>help me from this dilemma !!!
> > >
> > >Did you rewind the tape before trying to list its contents?
> > >
> > ># mt -f /dev/st0 rewind
> > ># tar tvf /dev/st0
>
>Actually, your device, /dev/st0, rewinds after each operation.  If you
>were using the non-rewinding device, /dev/nst0, you would have to
>rewind it in a separate command.
>
> > i wrote "mt -f /dev/st0 rewind" but it returns silent , no error messg , no attempt on tape to rewind it.
> >
> > i am confused why ?
> >
> > it just comes to prompt without doing anything, no activity , no message at all.
>
>That means the tape is already rewound.  If in doubt, you can issue
>
>   mt -f /dev/st0 reten
>
>and it will retension the tape by winding it all the way to the end
>and back again.
>
> > i checked "mt -f /dev/st0 offline" to confirm "mt" function though.
> > It works and tape ejects immediately .
> >
> > scratching my head why not with "rewind" option!
>
>It's working.  That's not your problem.
>
> > awaiting your reply
> >
> > thanks and regards
> >
> > ajay
>
>Cheers,

thanks now i got it and its working that is showing list .
i have one more query.

what is the proper command to restore data?
i issued :

tar xvfzp /dev/st0 /home/user

as i want to pick up only this particular user data , not entire tape .
i know it is hardly 4MB , but after firing this currsor strucks there and tape becomes busy "doing something" for unlimited time .

nothing comes out of tape even half and hour after.

i will be thankful for your suggestion.

also tell how can i also preserve ownership of data?
and can i use a file containing folder/file enteries inspite of defining individual folders name with tar command. if yes what is that file format and how to fit it in tar command ? 

regards

ajay
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