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Some related posts
http://archive.midrange.com/midrange-l/200410/msg00041.html 

Rob Berendt
-- 
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





"Wilt, Charles" <CWilt@xxxxxxxxxxxx> 
Sent by: midrange-l-bounces@xxxxxxxxxxxx
02/02/2005 04:47 PM
Please respond to
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>


To
"Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
cc

Subject
RE: Using DVD-RAM drive






Just an update...

I opened a PMR with IBM to get this question answered.

Apparently, though no mention of it is in the v5r2 docs or help text, the 
v5r2 SAVLIB command works like the v5r3 version.  Specifically, when 
CPRDTA(*YES) is specified, "Low software compression is used for all 
devices except optical DVD, which uses medium software compression."

Too bad v5r2 doesn't support the CPRDTA(*LOW | *MEDIUM | *HIGH) options 
that v5r3 does.

So I don't know that this DVD-RAM is going to be useful the way we 
intended, till we get to v5r3 and can take advantage of either the new 
compression options and/or the writable virtual optical support.


Charles Wilt
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
 

> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Wilt, Charles
> Sent: Wednesday, February 02, 2005 9:16 AM
> To: Midrange Systems Technical Discussion
> Subject: RE: Using DVD-RAM drive
> 
> 
> Vern,
> 
> I've looked at the help.
> 
> Doesn't explain why DTACPR(*YES) gives two different ratios 
> depending on rather you are going to a save file or the 
> DVD-RAM drive.  As you and I have both mentioned the DVD-RAM 
> drive doesn't have any built-in hardware compression/compaction.
> 
> Thus, in both cases, it is only OS/400 doing the compression.
> 
> Why then does the 3.27GB library end up at 795 MB when SAVLIB 
> goes directly to the DVD-RAM and 2.14GB when SAVLIB goes to 
> the save file??
> 
> Charles Wilt
> iSeries Systems Administrator / Developer
> Mitsubishi Electric Automotive America
> ph: 513-573-4343
> fax: 513-398-1121
> 
> 

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