Re: Strange mount/unmount diskgroup

From: fairlie rego <fairlie_r_at_yahoo.com>
Date: Sun, 18 Feb 2007 15:49:37 -0800 (PST)
Message-ID: <676355.89452.qm@web31911.mail.mud.yahoo.com>

Malden,

I think this could be the same issue discussed in ML note 361173.1 Asm Diskgroup success Mount And Umount messages in alert.log during Rman Backup

Thanks
Fairlie

Mladen Gogala <mgogala_at_vmsinfo.com> wrote: I have a RAC database with a standby. Both RAC and standby are on ASM. On standby,
I used the flashback recovery area located on the DGFRA diskgroup to create standby redo
logs. There aren't any problems but I am perplexed by entries like this:

RFS[1]: Successfully opened standby log 30: '+DGFRA/adprd/onlinelog/group_30.265.614877861'

SUCCESS: diskgroup DGFRA was dismounted
SUCCESS: diskgroup DGFRA was mounted
SUCCESS: diskgroup DGFRA was dismounted

Sun Feb 18 17:51:50 2007

SUCCESS: diskgroup DGFRA was mounted
SUCCESS: diskgroup DGFRA was dismounted
SUCCESS: diskgroup DGFRA was mounted
SUCCESS: diskgroup DGFRA was dismounted

Sun Feb 18 17:51:52 2007

Media Recovery Log /BACKUP/archives/archADPRD_1_514_614435904.dbf
Media Recovery Log /BACKUP/archives/archADPRD_1_515_614435904.dbf
Media Recovery Log /BACKUP/archives/archADPRD_2_863_614435904.dbf
Media Recovery Log /BACKUP/archives/archADPRD_1_516_614435904.dbf
Media Recovery Log /BACKUP/archives/archADPRD_2_864_614435904.dbf

Media Recovery Waiting for thread 1 sequence 517

Why in the world is it unmounting/mounting the diskgroup? What useful purpose does it serve and why
doesn't the instance just leave it mounted?
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Fairlie Rego
Senior Oracle Consultant
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http://www.freelists.org/webpage/oracle-l Received on Sun Feb 18 2007 - 17:49:37 CST