Backing up data to tape WAS [SunHELP] mt and ufsdump problem

[Jarrett Carver]

The fsf command will only work if you have already used the tape once.

Since FSF will try and fast forward over 1 EOF mark. If you have never wrote 
to the tape, there is no EOF mark and it will forward to the end of the tape 
without finding the EOF mark it is looking for.

I think what you want to do is UFSDUMP to a no-rewind tape device. This will 
allow you to dump all partitions to a single tape (provided the tape has the 
right capacity).

Example set the following to run one after the other:

ufsdump 0uf /dev/rmt/0cbn /dev/dsk/c0t0d0s0
ufsdump 0uf /dev/rmt/0cbn /dev/dsk/c0t0d0s1
ufsdump 0uf /dev/rmt/0cbn /dev/dsk/c0t0d0s3
mt -f /dev/rmt/0 rewind

After it is done, to restore from s3 you would need to

mt -f /dev/rmt/0n fsf 2
ufsrestore if /dev/rmt/0n

(Note YOU MUST use the non-rewind device on both commands, otherwise the 
tape will rewind. I know it obvious, but you would be surprised how many 
people miss that).

Perhaps that is what you were trying to do?



----Original Message Follows----
From: Bran Tregare <tregare at rit.com>
Reply-To: sunhelp at sunhelp.org
To: sunhelp at sunhelp.org
Subject: Backing up data to tape WAS [SunHELP] mt and ufsdump problem
Date: Sun, 11 Feb 2001 17:53:55 -0800

Shouldn't you be using TAR to get your data onto the tape drive?

  tar cvf /dev/rmt/0 *the path of the data you want to back up*

  for my box here (under solaris8) it is
         tar cvfE /dev/rmt/0 /export/home/*

that backs up all the user directories from my machine.



At 12:03 PM 2/11/01 +0000, you wrote:
>Hi
>I am trying to make a backup of my data on my Sun box. I  puted a tape
>in the
>backup device.
>when I tape the command:
>  #mt -f /dev/rmt/0 fsf
>I get this error message:
>/dev/rmt/0 fsf 1 failed: I/O error
>I have change the tape. and I have shutdown the machine and restart it
>but there
>is no change.
>Could you help me. I am using solaris 2.6 on Sun Sparc Server 20
>
>regards,
>Souleymane
>
>_______________________________________________
>SunHELP maillist  -  SunHELP at sunhelp.org
>http://www.sunhelp.org/mailman/listinfo/sunhelp

_______________________________________________
SunHELP maillist  -  SunHELP at sunhelp.org
http://www.sunhelp.org/mailman/listinfo/sunhelp


Jarrett Carver           http://www.geocities.com/solarboyz1
solarboyz1 at hotmail.com   Unix/NT Systems Administrator
___________________________________________________________

"In theory, there is no difference between theory and
practice. But, in practice, there is. "
       - Jan L.A. van de Snepscheut
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