RE: Using DVD-RAM drive

["Wilt, Charles" <CWilt@xxxxxxxxxxxx>]

Vern,

Thanks!  I took a look at it and think it might be the answer I'm looking for.

Doesn't look like the easiest API to use.  Have you actually used it?

Thanks,

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

> -----Original Message-----
> From: midrange-l-bounces+cwilt=meaa.mea.com@xxxxxxxxxxxx
> [mailto:midrange-l-bounces+cwilt=meaa.mea.com@xxxxxxxxxxxx]On 
> Behalf Of
> vhamberg@xxxxxxxxxxx
> Sent: Wednesday, February 02, 2005 5:59 PM
> To: Midrange Systems Technical Discussion
> Subject: RE: Using DVD-RAM drive
> 
> 
> Well, to mess things up a bit, there is an API at V5R2, the 
> QSRSAVO API, that can use all the compression options. It is 
> equivalent to SAVOBJ, without the 300-object specification 
> limit - you have to use a user space. So it's not the 
> prettiest, but I think there are generic ways to use it. 
> There is no SAVLIB equivalent - but SAVLIB basically just 
> saves the library object itself along with all its objects.
> 
> Vern
> -------------- Original message -------------- 
> 
> > 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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