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1. Multiple-CD There are lists of CD creating utilities for AS/400. Last I checked (a while ago) none of the people working seriously with this has managed multible CD's, so I guess that it is not easy to solve. Have another check - maybe it's becoming 'common knowledge'. Otherwise - if you are one of the more brilliant men - you might try to make dumps of multivolume-tapes. 2. Zip'ping: In addition to the IBM solution mentioned by Peter Dow, somebody has ported the GNU program GZIP to AS/400 and compiled the C program for you. This is of cause also GNU. 3. Our 'National Archive' in Denmark has published a very serious scientificly based evaluation of different medias (in Danish). The conclusion was: CD's are far more reliable than tape medias, CD drives are more likely to stay 'current technology' for a long time. So do use CD's but preferable CD's that can be put directly into AS/400. And of cause nothing will last forever and nothing is 100% reliable. Henrik http://hkrebs.dk > Date: Tue, 04 Dec 2001 16:54:35 -0600 > From: Brad Jensen <brad@elstore.com> > Organization: Electronic Storage Coporation > To: midrange-l@midrange.com > Subject: Writing multiple CD volumes for the AS/400? > Reply-To: midrange-l@midrange.com > > I have a neat little product, Niagra CD Recorder, that plugs > into an AS/400 and looks like a tape dirve. You savlib to it, it > writes it out to a CD Recorder. > > One problem is that I don't know how to make multiple-CD > volumes, so if the savlib is over 650 MB, I can't do it on > multipler CDs. What I mean is, I know how to do it, I just don't > know what IBM expects as a signal on the CD that the volume is > continued on the next CD. > > Anybody know, or know who to ask at IBM, or where to get info? > > I looked for a redbook that tells this, if it is out there I > haven't found it. (No surprise.) > > Second is I have been doing some savlibs thru this to a PC disk, > and ZIP compressing them. Library of program souce and object > code compress about 60%. Librarys full of database files > compress up to 94%! > > (That AS/400, not PC/INS stuff). > > Which means you could backup as much as 10 gigabytes of data on > a CD (they cost about 25 cents to 50 cents.) > > You cannot read that CD on an AS/400 directly, but - but - there > are c libraries to do this sort of compression. If IBM would put > the decompression in the AS/400 side, I would use the same on my > side to create the CDs. > > And the other thing I can do is stand in the middle between the > tape connection and the CD, and transparently decompress it (and > fix my multiple volume problem also.) > > (Pat pending.) > > Would you guys be neervous about using CDs as a backup format? > Would you be okay with using them in my 'drive' (actually a PC > with SCSI connection and CD/RW) rather than directly on the > AS/400 if they are over 650 MB? > > This has been in use for about 4 years by the way. We never got > excited about it because of the capacity problems. > > Brad Jensen > > ESC - We bring strange things to life > > > > > -- > Brad Jensen brad@elstore.com > President > Electronic Storage Corporation Tulsa OK USA > 918-664-7276 > > LaserVault Report Retrieval & Data Mining > www.Laservault.com > > www.eufrates.com - Add distance learning to > your site with easy course preparation >
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