Re: Converting from raw to filesystem

From: Radoulov, Dimitre <cichomitiko_at_gmail.com>
Date: Wed, 8 Feb 2006 18:04:12 +0100
Message-ID: <053f01c62cd1$b2a654f0$1a03310a@IBME1D11967173>

> thisis what i get after the plain dd
> dd if=/dev/rvdsystem01
> of=/usr/local/oracle/database/tempdb01/system01.dbf
> SQL> alter database open;
> alter database open
> *
> ERROR at line 1:
> ORA-01122: database file 1 failed verification check
> ORA-01110: data file 1: '/usr/local/oracle/database/tempdb01/system01.dbf'
> ORA-01251: Unknown File Header Version read for file number 1

I've always used the bs option(bs=1048576 in my case):

     bs=n  Set both input and output  block  sizes  to  n  bytes,
           superseding ibs= and obs=. If no conversion other than
           sync, noerror, and notrunc is  specified,  each  input
           block  will  be copied to the output as a single block
           without aggregating short blocks.

Example:

dd if=/dev/vx/rdsk/... of=/u01/oracle/... bs=1048576

And I found this on MetaLink:

ORA-1251
Text: Unknown File Header Version read for file number %s

---

Cause: Read of the file header returned a record but its version cannot be identified. Either the header has been corrupted, or the file is not a valid database file.
Action: Have the operating system make the correct file available to the database, or recover the file.

If you have a backup please restore the backup and retry the operation.Make sure you have specified like the following: dd if=/dev/xxx of=/a/spdevs04/ibmfs/osupport/yyy bs=4096 skip=1

Reference:

---

Note:1027958.6 MPP: (UNIX) COPYING RAW DEVICE TO FILE SYSTEM USING DD COMMAND Regards,
Dimitre

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Received on Wed Feb 08 2006 - 11:04:12 CST