We have had issues in the past with our DR test that some of the Unix file 
systems get corrupted using physical backups and restores.  

Support told me the only supported way is to do a logical backup and restore of 
those file systems.

So we take separate logical backups of our hfs and zfs datasets, the restore 
takes a long time.

Bill Miller

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of 
R.S.
Sent: Monday, October 18, 2010 10:42 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: zFS files at disaster recovery site

Crabtree, Anne D pisze:
> This was the first year that all of our OMVS files are zFS.  We recovered all 
> DASD via ADRDSSU and RESTORE jobs as usual.  When we IPL'd our production 
> system, OMVS took almost an hour to initialize.  I saw a lot of IOEZ00397I 
> messages.   A lot of the zFS files had to do some sort of recovery prior to 
> mounting.  From what I've read, that is because a physical backup was used 
> and the files were not "quiesced" prior to DUMPing with ADRDSSU.    Should 
> the zFS files be backed up separately from physical volume dumps for disaster 
> recovery purposes?  I was wondering how other companies take care of zFS 
> recovery??

1. ADRDSSU does quiesce ZFS during dump. Caution: ZFS cluster should 
have 'ZFS' attribute. See LISTCAT ENT(zfs.cluster) ALL

2. Long mount process is something known to ZFS. It depends on various 
circumstances and it's quite well described in ZFS redbook. With some 
tricks to circumvent this process. See SG24-6580-04.

-- 
Radoslaw Skorupka
Lodz, Poland


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