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Path: utzoo!linus!vaxine!wjh12!genrad!decvax!dartvax!uvm-gen!punia
From: punia@uvm-gen.UUCP (David Punia)
Newsgroups: net.micro,net.micro.16k,net.micro.cpm
Subject: Re: Floppy disk information request
Message-ID: <193@uvm-gen.UUCP>
Date: Thu, 21-Jun-84 09:08:13 EDT
Article-I.D.: uvm-gen.193
Posted: Thu Jun 21 09:08:13 1984
Date-Received: Sat, 23-Jun-84 06:36:22 EDT
References: <9102@lanl-a.UUCP>
Organization: University of Vermont (780a)
Lines: 19


	One thing to keep in mind regarding your Rainbow is that many SSDD 
diskettes may work (indeed, I have even had success with SSSD disks), but
the diskette manufacturers certify their diskettes to certain performance 
levels. They all come from the same bin. Those that can't hack the required
performance of a denser media are certified as SD. I wouldn't suggest 
punching extra holes in the diskette to use the second side for reasons 
cited in another reply (emjhm@uokvax). If you choose to use diskettes that 
the manufacturer will back up, you want SSDD and 96 TPI. Certain manufacturers
claim to certify the entire surface of their media, in which case the 96 TPI
clause could be ignored. Other SSDD media will only be certified for 40 or 48
TPI operation, so you take your chances. There may be bad areas between tracks
that your rainbow will attempt to use. I have heard that there is public 
domain software that will check a diskette for bad sectors and set up a list
for the operating system so as to avoid using these areas, but I have no
detailed info on that.

	Hope you enjoy your Rainbow. Good Luck!