Very Computer

by **G. Hugh SON** » Thu, 18 Nov 1999 04:00:00

> >Well,.. We have a DAT drive and our tape is that of 120meter (DDS-120).

> >Do you know how many GB it can save?

> afaik, 120 meter means DDS2, 4gb standard - 8gb compressed

> ciao
> marco

Thanks for the info.
We (Soan and I) have been using the "rhbackup..noarch.rpm" backup
utility
program. BTW, rhbackup disappeared when RH-6.0 appeared.
We realized that it does not handle multi-volume. That was the reason
why we began experimenting with "dump-restore" in the first place.
I think dump does not do "compression".

So folks,
What backup utility program do you use? Is BRU free to use in academic
institutions such as ours. "Taper" per se does not work. Maybe,
because
of "-b 64" is missing somewhere. I don't know. Our backup
requirements
include

1) should do "incremental", ("tar" cannot)
2) should do it under cron ("taper" cannot) for incremental.
3) should do multi-volume in the forground for full (rhbackup cannot)
4) it would be nice if it can do compression (dump cannot)

Thanks

--
G. Hugh Song

Department of Information and Communications
Kwangju Institute of Science and Technology

by **Jaap Schelleke** » Thu, 18 Nov 1999 04:00:00

[..]

Quote:>1) should do "incremental", ("tar" cannot)

I thought GNU tar could do that

Quote:>4) it would be nice if it can do compression (dump cannot)

I sometimes use compression with dump, just pipe it to gzip and write
to tape with dd. Not ideal but it works.
BTW Dump for linux has problems with multi volume backups. This is from my
mape page (a 5.1 system):

The Linux port of dump is not able yet to produce correct multi-volume
backups.

Cheers -- Jaap

by **Leonard Even** » Thu, 18 Nov 1999 04:00:00

> > >Well,.. We have a DAT drive and our tape is that of 120meter (DDS-120).

> > >Do you know how many GB it can save?

> > afaik, 120 meter means DDS2, 4gb standard - 8gb compressed

> > ciao
> > marco

> Thanks for the info.
> We (Soan and I) have been using the "rhbackup..noarch.rpm" backup
> utility
> program. BTW, rhbackup disappeared when RH-6.0 appeared.
> We realized that it does not handle multi-volume. That was the reason
> why we began experimenting with "dump-restore" in the first place.
> I think dump does not do "compression".

> So folks,
> What backup utility program do you use? Is BRU free to use in academic
> institutions such as ours. "Taper" per se does not work. Maybe,
> because
> of "-b 64" is missing somewhere. I don't know. Our backup
> requirements
> include

> 1) should do "incremental", ("tar" cannot)
> 2) should do it under cron ("taper" cannot) for incremental.
> 3) should do multi-volume in the forground for full (rhbackup cannot)
> 4) it would be nice if it can do compression (dump cannot)

> Thanks

> --
> G. Hugh Song

> Department of Information and Communications
> Kwangju Institute of Science and Technology

You can do incremental backups with tar. Here is my
tar script for backing up everything which changed since
the last backup. In my case, I do it to a zipdisk, but you
could modify this to do it to a tape. You would have to
store the date of the last incremental backup somewhere;
I do it on the zipdisk. You would also have to use
mt commands to position yourself on the tape. And I would
strongly recommend using the eof option of mt to add an EOF
after each record. Then you can use mt fsf skipping twice
for each record to position the tape.

mount /zipdos
DAY=`date +%j-%H-%M` #day of the year-hour-min
FILE=/zipdos/incr_"$DAY".tgz
cd /
DIRS="./home ./etc ./boot ./root ./usr/local ./var"
/bin/tar --exclude cache --exclude opt --exclude magma -czlf $FILE -N
"`cat /zipdos/tar.date`" $DIRS
date > /zipdos/tar.date
du -s /zipdos
umount /zipdos
--

Dept. of Mathematics, Northwestern Univ., Evanston, IL 60208

by **marco viol** » Thu, 18 Nov 1999 04:00:00

Quote:>requirements include

>1) should do "incremental", ("tar" cannot)

jaap is right: tar -G/-g

Quote:>2) should do it under cron ("taper" cannot) for incremental.

tar

Quote:>3) should do multi-volume in the forground for full (rhbackup cannot)

tar -M (look also -F)

Quote:>4) it would be nice if it can do compression (dump cannot)

tar -Z/-z/--use-compress-program PROG

i'm not sure if i've seen a new dump on cola, take a look

ciao
marco

by **coffe** » Fri, 19 Nov 1999 04:00:00

> > >Well,.. We have a DAT drive and our tape is that of 120meter (DDS-120).

> > >Do you know how many GB it can save?

> > afaik, 120 meter means DDS2, 4gb standard - 8gb compressed

> > ciao
> > marco

> Thanks for the info.
> We (Soan and I) have been using the "rhbackup..noarch.rpm" backup
> utility
> program. BTW, rhbackup disappeared when RH-6.0 appeared.
> We realized that it does not handle multi-volume. That was the reason
> why we began experimenting with "dump-restore" in the first place.
> I think dump does not do "compression".

> So folks,
> What backup utility program do you use? Is BRU free to use in academic
> institutions such as ours. "Taper" per se does not work. Maybe,
> because
> of "-b 64" is missing somewhere. I don't know. Our backup
> requirements
> include

> 1) should do "incremental", ("tar" cannot)
> 2) should do it under cron ("taper" cannot) for incremental.
> 3) should do multi-volume in the forground for full (rhbackup cannot)
> 4) it would be nice if it can do compression (dump cannot)

> Thanks

> --
> G. Hugh Song

> Department of Information and Communications
> Kwangju Institute of Science and Technology

Hello G.

I also use a Surestore Dat 8 drive and find them kinda nice.

The Drive unfortunately doesnt work well with Taper. I get consistant
segmentation faults. This is a compatibility issue from what I can find
on the subject. Here is what I do.

Wrote an executable script that uses tar for backing up. I backup all
the major directories - /home, /etc, /usr, /root, /boot, ect...

Incidently, The HP Surestore Dat 8 drive is very suseptible to dirt and
dust in the gears. If you take the top cover off the drive you will see
a metal "Gear Box" at the front held in by one small screw. This needs
to be taken out and cleaned periodically. You will have to take off the
bottom cover also to do this as the drive belt is ran underneath the
"Drive Gear".

Just some helpful info on the Dat 8 drives. If anyone has questions on

coffee
--

coffee at indy dot net * ICQ 1614986
Kokomo, Indiana, USA

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