Re: Backup using dd

From: mako <makoml_at_jcom.hone.ne.jp>
Date: Thu, 27 Sep 2001 21:52:03 GMT
Message-ID: <7cNs7.1835$kn.219077@news1.rdc1.ky.home.ne.jp>

The skip is only needed on

AIX 4K
Dec unix 64K

So, we don't need to skip on Linux as far as I know.

Please refer to news threads
"How to convert RAW <-> File datafiles of tablespace?" (2001/9/20)

And you have better to try backup files with dd is valid or not by replacing datafiles from original to backuped files while instance is down.

Hope this helps

Mako

"ctemp" <ctemp01_at_hotmail.com> wrote in message news:4d44e6cf.0109270948.23ede0e8_at_posting.google.com...
> I am trying to backup a database which datafiles are on raw device. It
> is a 8.1.7 database on Redhat 6.2. The following command supposed to
> be used:
>
> dd if=/dev/... of=/opt/... bs=<block size> skip=<header block>
>
> Question: how many header blocks I need to specify here e.g. bs=512,
> skip=???
>
> Any help info will be appreciated.
>
> Thanks,
> Yu
Received on Thu Sep 27 2001 - 16:52:03 CDT