Re: as400 cd rom -- MIDRANGE-L

>  From:    mboceanside@worldnet.att.net (Pat Barber)
>  
>  MacWheel99@aol.com wrote:
>  > 
>  > For some models of AS/400, 
>  > the cd rom shares port with tape drive & you have
>  > to remap port to use cd rom when you need cd then remap back to tape 
drive
>  > when need to do a backup.
>  
>  Say what ??? Which model do you think does this ??

We know for a fact, because that was our reality for many years on AS/436.

We could not use our tape drive & our CD Rom at the same time.  We had to map 
the port to one or the other.  Since we used the tape drive daily for 
backups, this meant the CD Rom was useable only when we re-mapped so we could 
not use the tape drive until we were done with the CD Rom & mapped it back. 

Now what I do not know is how common that reality is across the AS/400 model 
lines.  I suspect that at the low end of the model range there might be a 
limitation on the number of hardware ports available for which this sort of 
thing shows up in other scenarios.

I have also seen the scenario on PCs ... when I first got a tape backup 
system on my home PC in 1993, tape backups were a rarety in the home PC 
market & the only way I could get it installed was to use the same port as my 
diskette drive, which meant that only one could be run at a time ... 
fortunately the switcheroo was built into my tape backup software, so that it 
grabbed the port until I was done, then returned the port to the diskette 
drive. 

> From: list_receiver@csiltd.co.uk (Mike Buglass)
>  
>  I think you are getting mixed up with the System 36 virtual machine. This
>  requires you to map the CD drive to either T1 or TC in order to use it

This was true ALSO for the AS/400 side.
It was true for the entire hardware.
When the port was mapped to the tape drive, we could not use the CD Rom.
When the port was re-mapped to the CD Rom, we could not use the tape drive
It was one or the other, irrespective of SSP or OS/400

We are now on a 170 - some stuff is faster, some stuff slower than same tasks 
on 436 - on balance, I am not impressed with the change in performance ... I 
have been given a mountain of re-programming work because of jobs that ran 
efficently on 436 that now need to be re-thought to eventually work as good 
on the 170 ... same version of OS

Al Macintyre  ���
http://www.cen-elec.com MIS Manager Programmer & Computer Janitor

Y2K is not the end of my universe, but a re-boot of that old Chinese curse.
The road to success is always under construction.
Accept that some days you are the pigeon and some days the statue.
Murphy's Mom brought wrong baby home from hospital so it should be Kelly's 
Law.
If consistency is the hobgoblin of little minds, only geniuses work here.
When you want it cheap - you get what you paid for.
When in doubt, read the manual, assuming you can find the right one.
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