Sounds like a case for EMC...     

Not a fix, but a workaround while you wait for emc support would be to
schedule a 'nsrmm -m -f /bigdisk/_AF_Readonly'   several times a
night...    


> -----Original Message-----
> From: EMC NetWorker discussion 
> [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Lee Roth
> Sent: Friday, 28 March 2008 12:34 PM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: [Networker] adv_file read-only device dismounting itself
> 
> Networker for Unix (Solaris) V7.4
> 
> For the 2nd time in six months, I've had a very strange occurrence: My
> "read-only" (RO) adv_file disk device decides to dismount 
> itself in the
> middle of the night, causing serious havoc (read: logjam next 
> morning) on
> the remaining backups, cloning, staging, etc.

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