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- Newsgroups: comp.sys.ibm.pc.misc
- Path: sparky!uunet!spool.mu.edu!wupost!sdd.hp.com!saimiri.primate.wisc.edu!ames!pacbell.com!att-out!cbfsb!cbnewsg.cb.att.com!rnichols
- From: rnichols@cbnewsg.cb.att.com (robert.k.nichols)
- Subject: Re: 3.5" dis , 1.44MB, or 2.0MB :SUMMARY
- Message-ID: <1992Dec12.010836.13147@cbfsb.cb.att.com>
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- References: <Bz2Iu3.n2w@acsu.buffalo.edu> <Bz3rEK.JEs@acsu.buffalo.edu>
- Date: Sat, 12 Dec 1992 01:08:36 GMT
- Lines: 21
-
- In article <Bz3rEK.JEs@acsu.buffalo.edu> v120q4jf@ubvmsb.cc.buffalo.edu (Vax Crazie (ROB B.)) writes:
- ...
- > I guess Sony just uses their "2.0 MB unformatted"
- >as a marketing tool for the person who is a sucker.
- ...
-
- Hardly. Sony has no way to know how you might format those disks.
- FDFORMAT ver 1.8 can get 1.68MB at the same bit density on those same
- 80 tracks. Norton Backup gets about the same capacity by formatting
- the data area with 1024-byte sectors instead of 512. The box of disks
- on my desk right now shows both the unformatted and formatted
- capacities. It says, "Formats to IBM: 1.44MB." Of course, that's not
- necessarily true either, as I just pointed out.
-
- All 3.5" HD disks will have the identical capacity if formatted the
- same way. It's not the same situation as with tape, where different
- lengths can be packaged in the same physical shell.
-
- Bob Nichols
- AT&T Bell Laboratories
- rnichols@ihlpm.ih.att.com
-