RE: copy a datafile to a raw device

Well heck. Nobody else has replied, so I might take a stab at it here. I suspect that the format of the data (bits and bytes) required on a raw device is different than the format of the data in a file in a file system. I'm stretching a bit here, but I think an analogy would be what would happen if you dd a file from UFS to NTFS. The data on the NTFS might be a digital copy of what was on UFS, but it's format is totally useless in the context of NTFS.

> -----Original Message-----
> From: Gurelei [mailto:[EMAIL PROTECTED]
> Sent: Thursday, June 19, 2003 1:55 PM
> To: Multiple recipients of list ORACLE-L
> Subject: copy a datafile to a raw device
>
>
> hi all:
>
> I need to move a SYSTEM datafile from a filesystem
> to a raw device. I have shutdown the database,
> copied the file via
>
> dd if=system of=/dev/raw
>
> renamed the file in the database, but couldn't open
> the database because of the error: Unknown File Header
> Version read for file number 1.
>
> I tried another dd:
>
> dd if=system of=/dev/raw obs=32768 (32K is the db
> block size), but I got the same error. Can anyone
> see what else could be wrong with my dd command
>
> thanks
>
> Gene
>
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