Hi,
Restore the corrupted datafile from Backup and start the DB. Pls check the 
Alert<sid>.log for more info.

Venkat
--

On Thu, 30 Jan 2003 19:38:46  
 shuan.tay(PCI¾G¸R³Ô) wrote:
>Dear DBAs,
>
>My DB was down just now.
>after checking the trace file, it was an CKPT error 1242,
>using oerr will show:
>"Cause: The database is in NOARCHIVELOG mode and a database file was
>        detected as inaccessible due to media failure."
> Action: Restore accessibility to the file mentioned in the error stack
>         and restart the instance."
>
>What's the error stack means in the "Action"?
>where can i find it?
>
>Thanks in advance.


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