fbackup/frecover clarification...

[Hazem Mahmoud_3]

Ok, I need some guidance here. Here is the history:
We ran fbackup and it took almost 2 hours to back up approximately 10GB of data. We were able to frecover it in a little less than an hour. So we almost excluded that method until I saw a post to a thread where Bill Hassell suggested using the -c option (great suggestion Bill!). It dropped the backup time to a half hour for the same data, which is great!
Now, the problem comes with frecover. I get the following error message:
frecover(2114): read error from input device (I/O error)
frecover(2114): read error from input device (I/O error)
frecover(2113): unable to resync backup media

and it only backs up a few files. I tried rerunning it several times and through SAM. I also saw a post that said to do the following:
frecover -x -v -f :/dev/rmt/1m
and put in the hostname, but that also did not work.
So, I have two questions:

1. How can I properly restore the backup if I used the config file with the following options?:
blocksperrecord 256
records 32
checkpointfreq 1024
readerprocesses 6
maxretries 5
retrylimit 5000000
maxvoluses 200
filesperfsm 2000

2. How can I find out what are the optimum settings in the config file for my environment? Is there a doc somewhere I can read. I have a Quantum DLT8000 drive. HP-UX 11i.

Thanks for any and all responses.

-Hazem

[Rene Mendez_4]

This option the frecover list content the tape:

frecover -xNvf /dev/rmt/1m

[Hazem Mahmoud_3]

Rene,
Thanks for the information, but that doesn't really answer my two questions above.

-Hazem

[Bryan D. Quinn]

Hello Hazem,

We use fbackup with the -c option and I have not had any problem doing an frecover. Are you sure that you have a good backup? As Rene suggested, I would try to list the contents of the tape, if you have not done so already. This does not necessarily prove that you have a good backup, but if you get an error it might suggest that you have a tape issue or something of that nature.

frecover -v -f /dev/rmt/1m -I /tmp/tape.contents

See if this command will read from the tape or if it also gives you an error.

Hope this helps!

-Bryan

[Hazem Mahmoud_3]

Bryan,
The command you gave me error'd out saying that there is no "-l" option. I tried the one from Rene and it worked, but it also gave the error message below. I'm kind of stumped as to what is wrong here. I'll try and take another backup and see what happens.

frecover(2114): read error from input device (I/O error)
frecover(2114): read error from input device (I/O error)
frecover(2113): unable to resync backup media


-Hazem

[Bryan D. Quinn]

Hello Hazem,

That should have been an uppercase i in the command.

I would definately take another backup and see what the outcome is.

-Bryan