[comp.sys.amiga.tech] Recoverable ram disk

dave@cs.arizona.edu (David P. Schaumann) (03/19/90)

Help!  I have an A500 w/a A501 ram expander, for a total of 1 meg main memory.
I wanted to create a rad: of size 440k.  So, I went into MountList, changed
HiCyl to 39, mounted it ok, but when I referenced it, no icon came up on
workbench.  Also, when I tried to 'cd' to it, I got the message "can't find
device rad:" or some such.  When I change HiCyl back down to 21, everything
works fine.
  I suspect this is caused by the fact that when I try to mount it, I don't
have a contiguous 440k memory segment available, but it says nothing about
this in the docs that I have.
  Can anyone confirm this?  Is there a way of working around this (besides
buying more RAM :)?

Thanx for any and all help,	|   /\  /\  /\/\  /\	Hi, my name is Cliff.
Dave Schaumann			|  /  \/\ \/   /\/  \/\ Drop over some time.
dave@cs.arizona.edu		| / /\   \/   /  \     \   ba ha ha ha ha ha ha

dave@cs.arizona.edu (David P. Schaumann) (03/20/90)

Still trying to get a 440k rad: drive.

I did some expermenting.  First, I made the 1st 2 lines of my startup sequence
file as thus:
c:mount rad:
c:copy c:ls rad:

And then tried various values for HiCyl.  The bottom line is I got up to 35
before weirdness set in.  Along the way, I also discovered that my rad: 
device was coming out of CHIP RAM!!!!!  No matter how big this sucker is, I
definitely want it in FAST ram.  BTW, I tried inserting
"SYS:system/FastMemFirst" as the first line, but it changed nothing.  Can
anybody (please?) tell me how to make my rad: come from fast ram?

Thank youThank youThank youThank youThank youThank youThank youThank you
Dave Schaumann
dave@cs.arizona.edu

koleman@pnet51.orb.mn.org (Kurt Koller) (03/23/90)

>before weirdness set in.  Along the way, I also discovered that my rad: 
>device was coming out of CHIP RAM!!!!!  No matter how big this sucker is, I
>definitely want it in FAST ram.  BTW, I tried inserting
>"SYS:system/FastMemFirst" as the first line, but it changed nothing.  Can
>anybody (please?) tell me how to make my rad: come from fast ram?

If in yur mountlist there is a line like "BufMemType=3" change it to 
"BufMemType=1"
 
This specifies public ram rather than chip.  A value of '5' would specify fast
Ram only, and would die if it was run on a system without it.

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