I think in the case of having to run 2 backups jobs I would run one
backup job and then run a utility job to copy the 1st set of tapes to
the remote set of tapes. 

Jim Dodds
Systems Programmer
Kentucky State University
400 East Main Street
Frankfort, Ky 40601
502 597 6114


-----Original Message-----
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Mark Llewellyn
Sent: Thursday, June 05, 2008 4:13 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: VM:Backup: Twinning Tapes to Remote Tape Unit

Greetings,

We are ramping up our Technical Recovery Plan, and intend to use
channel-
extended tape units at a remote location when performing our regular
full 
and incremental backups.  

We use CA's VM:BACKUP for file-level backups, and will be using VM:HiDRO

to capture the system image.  We're curious as to whether any other CA 
customers are using the synchronous tape "twinning" feature with one
local 
tape unit and one remote.  We've been cautioned by our network folks
that 
the response time from the remote tape unit would be quite a limiting 
factor affecting the speed of a synchronous, twinned backup.

Our other option is to simply run two backup jobs, one to the local
drive 
and one to the remote, but that effectively doubles the hit of the
backup 
jobs.

Any anecdotes or insight would be most welcome!  

Mark Llewellyn
VM Systems Support
Visa, Inc.

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