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Tar Backup on Tape Device

HP-UX 11.31
Occasional Advisor

Tar Backup on Tape Device

Hi,

I want to take full server backup (tar) on tape device with RedHat linux OS.

Device and tape details are as below:-

*********************************************
[root@eilindex tmp]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda8 4.9G 349M 4.3G 8% /
/dev/sda1 999M 5.6M 993M 1% /boot/efi
/dev/sda2 79G 2.1G 73G 3% /data
none 2.0G 0 2.0G 0% /dev/shm
/dev/sda9 3.9G 40M 3.7G 2% /home
/dev/sda3 15G 69M 14G 1% /opt
/dev/sda7 4.9G 69M 4.5G 2% /tmp
/dev/sda5 9.7G 3.6G 5.6G 40% /usr
/dev/sda4 9.7G 148M 9.0G 2% /var


[root@eilindex /]# mt -f /dev/st0 status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x47 (TR-5).
Soft error count since last status=0
General status bits on (41010000):
BOT ONLINE IM_REP_EN

**********************************************

Kindly help me in this.

Regards,
Ranjeet
7 REPLIES
Michal Kapalka (mikap)
Honored Contributor

Re: Tar Backup on Tape Device

hi,

what exactly ???

OS backup or data backup ( just directory structure )

mikap
HP-UX 11.31
Occasional Advisor

Re: Tar Backup on Tape Device

Hi,

I want to take all data backup.

Regards,
Ranjeet
Prasanth V Aravind
Trusted Contributor

Re: Tar Backup on Tape Device

>> I want to take all data backup.

it seems you want backup of all files/dirs under root (/)

1. cd /
2. tar -cvf /dev/st0 .

if you want to take backup of particular filesystem.

tar -cvf /dev/st0 /filesystem_name


GUdluck
Prasanth
Nafez ALNajjar
Frequent Advisor

Re: Tar Backup on Tape Device

Hi,

I would recommend using bzip2 compression as:

#tar -cjvf /dev/st0 /

Steven Schweda
Honored Contributor

Re: Tar Backup on Tape Device

> I would recommend using bzip2 compression
> [...]

Using a reasonably modern tape drive, with
hardware compression, I would not.
Nafez ALNajjar
Frequent Advisor

Re: Tar Backup on Tape Device

>Using a reasonably modern tape drive, with
>hardware compression, I would not.

are you pretty sure that you can read 1year old tapes with new hardware ??
We have seen that is not true. We use softwrae instead.
Steven Schweda
Honored Contributor

Re: Tar Backup on Tape Device

> are you pretty sure that you can read 1year
> old tapes with new hardware ??

I'm quite sure that I can read my older tapes
with my newer tape drives. When I need
compatible hardware, I normally buy
compatible hardware.

> We have seen that is not true.

Perhaps you should buy compatible hardware,
instead of whatever (unspecified) stuff you
have been buying.

> We use softwrae instead.

And you have my permission to do that, but I
prefer to do things in an easy, reliable way,
which does not consume huge amounts of my
limited CPU power doing a job which many
modern tape drives can do without any
external help.