ADSM-L

Re: Can I enlarge a dbvol by mirroring?

2007-03-01 13:46:45
Subject: Re: Can I enlarge a dbvol by mirroring?
From: Otto Schakenbos <oschakenbos AT TELEFLEX DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 1 Mar 2007 19:45:37 +0100
Maybe you can define a third bigger dbvol copy, then delete one of the
smaller ones and define another bigger dbvol copy and then delete the
last small dbvol?

Cheers

Otto Schakenbos
System Administrator

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Allen S. Rout wrote:
On Thu, 1 Mar 2007 09:01:33 -0500, "Kauffman, Tom" <KauffmanT AT NIBCO DOT COM> 
said:




If your Dbvbols are not in a hardware raid or mirrored environment,
the correct (or paranoid) procedure would be to create a new 12 GB
dbvol AND a 12 GB dbvol mirror -- and THEN delete the 9 GB dbvol and
the 9 GB mirror. It takes a bit longer, but it is the clean way to
go.


Actually, you're still exposed there.

The procedure goes:

DEF DBVOL new
DEF DBCOPY new new-copy

DEL DBVOL old-copy

[D'oh! old is now unmirrored]

DEL DBVOL old

and for however long it takes you to copy, you stay unmirrored.

Now, this is not a huge exposure, in the scheme of things.  But it
-is- an exposure, and I don't see a reason for it.  I've wished aloud
here in the past for something like 'EMPTY DBVOL' so you can move data
off a mirrored volume onto other mirrored vols.


- Allen S. Rout