RE: ASM tracking datafiles

From: Luca Canali <>
Date: Thu, 26 Feb 2009 10:30:07 +0100
Message-ID: <>

ASM keeps metadata in the first allocation units of the disks (first two typically) and also has metadata files (regular ASM files with file number < 256 so that you would not see them in v$asm_file). Some info on what metadata files are available is in, more details in the book Oracle Automatic Storage Management, Osborne Oracle Press 2007, N. Vengurlekar, M. Vallath and R. Long.


-----Original Message-----

[] On Behalf Of hrishy Sent: Thursday, February 26, 2009 6:45 AM To:; Niall Litchfield; Cc:
Subject: Re: ASM tracking datafiles

Hi Dan/Niall

Thanks for providing the detailed answer i was looking for.

I have one more question though since ASM does not have a control file where does it keep the information of all the disks and diskgroups

Thanks for the valuable link its simply amazing to see the level of details on ASM on your site very handy for troubleshooting



-- Received on Thu Feb 26 2009 - 03:30:07 CST

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