RE: Lost the rawdevice mapping

From: Luca Canali <>
Date: Tue, 22 Jan 2008 16:39:25 +0100
Message-ID: <>

You should be able to recover easily from this, provided you haven't damaged your disks. The name of the rawdevices (and/or the mapping block device to raw device) is not important for ASM which keeps track of the necessary information within disk headers and other structures allocated in the disks themselves. So if you just make ALL the required storage visible to ASM in any order that should be good enough. BTW, you don't need to use rawdevices with 10.2 (on RHEL4 or higher), block devices are OK for ASM (tested).


PS: if are using RAC you would need to restore the OCR and voting disk rawdevices with the correct names though.

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

[] On Behalf Of hrishy Sent: Tuesday, January 22, 2008 3:32 PM
Subject: Lost the rawdevice mapping


We Lost the rawdevice mapping file

we do not have OS backup
ASM is unable to mount diskgroups

Is it possible to get the device mappings back


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-- Received on Tue Jan 22 2008 - 09:39:25 CST

Original text of this message