We could BEG IBM to add native VTAPE to z/VM ..  even 'lowly VSE' supports 
VTAPEs.

-----Original Message-----
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED]
Behalf Of Michael Coffin
Sent: Tuesday, June 17, 2008 1:01 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: DDR'ing 3390 DASD To Remote Location


Hi Aria,

It's weird, sometimes it takes as little as 15 minutes to DDR2CMS a
3390-3 spindle, but most times it takes 45-50 minutes.  But "all
spindles are not created equal", so you might have one that has very
little actual data on it (even if it is fully allocated for minidisks,
those minidisks might be substantially empty), and one that is full to
the gills.  Likewise, some data compacts better than others (for example
one spindle contains a bunch of 'zip' files sent to us by PC users,
those files are already well compressed and further compaction isn't
likely).  

Again, if I can't (quickly) find a means to read the disk and write to a
TCPIP stream directly (with a collector on the remote end, of course),
I'll probably replace DDR2CMS with PIPEDDR to create the intermediate
files before transmitting them.

-Mike

-----Original Message-----
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Aria Bamdad
Sent: Tuesday, June 17, 2008 1:44 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: DDR'ing 3390 DASD To Remote Location


On Tue, 17 Jun 2008 13:00:37 -0400 Michael Coffin said:
>Hi Aria,
>
>We are on an IBM 2066-0B1 with ESCON channels to an IBM 9393, running 
>with a full system load.  It would probably only take about 10 minutes 
>on a big z9 (or z10) box, lightly loaded with FICON channels..... :)

I wish!!! I am on a 2066-0B1 with ESCON channels also.  The DASD is an
EMC 8430 with lots of cache however.

Aria.

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