topic Re: Info about back-up in Operating System - HP-UX

Info about back-up

Dario_4 — Fri, 16 Nov 2001 09:47:06 GMT

Hi,
i wuold like to know which is the best way to back-up /home/try (and all the dir under it) on a tape?
Whit fbackup, inclueded into the file graph_file all the dir or with tar (tar cvf try.tar /home/try) .

Thanks

Re: Info about back-up

James Beamish-White — Fri, 16 Nov 2001 09:51:52 GMT

Depends on your needs. Fbackup is faster, but is locked to HP-UX, while tar is standard across all unix.

If you only use HP-UX, then I'd go wth fbackup.

Party on Dude!
James

Re: Info about back-up

Dario_4 — Fri, 16 Nov 2001 09:56:22 GMT

Ok,
you are right.
But for back-up all direcory under /home/try on tape?

tar cvf try.tar /home/try

Is sufficent?

Thanks

Re: Info about back-up

Thierry Poels_1 — Fri, 16 Nov 2001 09:56:46 GMT

Hi,

again "It depends"
fbackup is the most flexible tool, but only supported on HP-UX.
tar (and cpio) is the most compatible one, can be read on other unixes (even SCO, Linux, ...), but is less flexible than fbackup in restoring specific files to specific directories.

regards,
Thierry.

Re: Info about back-up

Deepak Extross — Fri, 16 Nov 2001 10:09:27 GMT

<< tar cvf try.tar /home/try
Is sufficent? >>

this would backup /home/try into a tar file try.tar in the directory from where you run the command. If you want it to go to the tape drive, don't use the 'f' flag.
"tar cv /home/tar" will send it to the default tape drive. Or use "tar cvf /dev/rmt/0m /home/tar" to send it to teh device /dev/rmt/0m.
You dont need to use a tar file name if you're writing to tape.

Also, I'd suggest you specify the relative path instead of an absolute path.
If your tar was created with "tar cv /home/tar", then when you untar it, it will overwrite or create the /home/tar directory.
Instead, do a "cd /home/tar ; tar cvf ./". You can untar this in any convenient directory when you need to.

Re: Info about back-up

Deepak Extross — Fri, 16 Nov 2001 10:12:16 GMT

oops..read "home/tar" as "home/try" in my last posting.

sed 's/home\/tar/home\/try/' last_post > new_post

:-)

Re: Info about back-up

Dario_4 — Fri, 16 Nov 2001 10:24:33 GMT

Eheh,
no problem Deepack. You are a master.
Do you suggest:

cd /home/try ; tar cvf ./ ??

This command, back up /home/tar and all the dir under /home/try to tape?

Thank you very much

Re: Info about back-up

Deepak Extross — Fri, 16 Nov 2001 10:30:21 GMT

Uh-oh..bad day.
It should be
"cd /home/try ; tar cv ./"
Or, if you want to specify the device name (say, if you have more than one tape drive and dont want to overwrite somebody else's tape)
"cd /home/try ; tar cvf ./"
Your tape drive could be /dev/rmt/0m or /dev/rmt/1m or whatever.

Hmmm..I didnt see that profile of yours before :-)

Re: Info about back-up

Deepak Extross — Fri, 16 Nov 2001 10:47:41 GMT

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x316efd3f91d3d5118ff40090279cd0f9,00.html

- Playing Shylock and Lovin' It -

Re: Info about back-up

Alexander M. Ermes — Fri, 16 Nov 2001 11:02:37 GMT

Hi there.
Nice discussion, guys. What about the limit of tar or cpio with files larger than 2 GB ?
If you stay with HP machines, use fbackup in command line mode for these files.
For other systems think about OmniBack II.
Rgds
Alexander M. Ermes

Re: Info about back-up

Fred Martin_1 — Fri, 16 Nov 2001 14:25:00 GMT

If you elect to use cpio, the command would like somthing like this:

find /home | cpio -ocuvB > /dev/rmt/tapedev

That would backup everything under /home.

Restoring:

cpio -iBdcvm "filename" < /dev/rmt/tapedev

Listing tape contents:

cpio -ictBv < /dev/rmt/tapedev

Do a 'man' on cpio for the switches that would best fit what you are doing.

Re: Info about back-up

Sanjay_6 — Fri, 16 Nov 2001 14:48:27 GMT

Hi Fabrizio,

Maybe this can help you,

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90742/B2355-90742_top.html&con=/hpux/onlinedocs/B2355-90742/00/00/51-con.html&toc=/hpux/onlinedocs/B2355-90742/00/00/51-toc.html&searchterms=backup&queryid=20011116-064758

Here are some links on backup commands.

Tar

http://docs.hp.com/cgi-bin/onlinedocs.py?mpn=B2355-90680&service=hpux&path=../B2355-90680/00/00/53&title=HP-UX%20Reference%20Volume%201%3A%20Section%201

Cpio

http://docs.hp.com/cgi-bin/onlinedocs.py?mpn=B2355-90680&service=hpux&path=../B2355-90680/00/00/53&title=HP-UX%20Reference%20Volume%201%3A%20Section%201

Fbackup

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90681/B2355-90681_top.html&con=/hpux/onlinedocs/B2355-90681/00/00/78-con.html&toc=/hpux/onlinedocs/B2355-90681/00/00/78-toc.html&searchterms=cpio&queryid=20011116-064922

Hope this helps.

Regds